ABB SPAU 331 C User Manual
SPAU 331 C  
Voltage relay  
User´s manual and Technical description  
U<  
3U<<  
U
2
U
U
U
U
IRF  
IRF  
12 23 31  
f = 50Hz  
n
=
=
o
U
U
100V 110V ( U )  
n
n
/
5
60Hz  
100V 110V ( U  
)
/
0
SPAU 331 C  
STEP  
STEP  
0.8  
10  
0.5  
50  
U
aux  
1
2
3
4
5
6
7
8
U<  
U
U
>
o
n
[
%
]
STEP  
SG1  
STEP  
SG1  
U
n
2
20  
0.4  
1.2  
–
80...265 V  
SGR  
~
18...80 V  
–
0.5  
t
[
]
s
>
1
0
>
t
s
[ ]  
k<  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
0.05  
1.0  
0.1  
1.0  
U1  
U2  
U3  
SPCU 1C6  
SPCU 3C15  
0.6  
0
0
0
0
0
0
0
0
0
0
0
0
3U<<  
U
U
>>  
o
n
[
%
]
80  
U
n
[
]
<
1
2
3
4
5
U
n
n
t
U
1
2
3
4
5
6
7
8
U
U
U
/
%
/
U
o
(
n
n
U
/
U
/
0
0
1
1
10  
0.1  
1.2  
1.0  
>
)
o
o
max  
U
n
∞
<<  
(U  
t
t >>  
>>  
%
%
)
]
3
n
RESET  
RESET  
[
>
U
n
n
t
U
/
/
/
min  
(U  
n
0.5  
0.5  
[
]
t
<
)
U
[
s
]
t <  
>>  
t
s
[ ]  
(
3
<<  
)
%
[
[
]
<
0.05  
1.0  
U
t
t
0.1  
/
/
>
U
>>  
U<  
o
o
U<<  
]
<<  
%
t
RS 613  
Ser.No.  
SPCU 1C6  
SPC 000  
SPCU 3C15  
Two-stage residual overvoltage relay module The under voltage stage U< can be given defi-  
containing a low-set residual overvoltage stage nite time characteristic or inverse time charac-  
Features  
U > and a high-set residual overvoltage stage teristic while the under voltage stage 3U<< fea-  
0
U >>  
0
tures definite time characteristic only  
Both residual overvoltage stages feature definite Numerical display of setting values, currently  
time characteristic and wide setting ranges  
measured values, fault values, operate times,  
event messages etc.  
Two-stage undervoltage relay module containing  
a higher under voltage stage U< and a lower Serial interface for connection of the relay to  
undervoltage stage 3U<<  
the serial bus and a substation level communi-  
cation and reporting system and/or a remote  
control system  
The three-phase undervoltage stage U< starts if  
one or more of the phase-to-phase voltages fall  
below the set start level  
High system reliability and availability through  
integrated self-supervision system with auto-  
diagnostics capabilities in the relay modules  
The three-phase under voltage stage 3U<< starts  
if all three phase-to-phase voltages fall below the  
set start level  
The voltage relay SPAU 331 C is intended for The voltage relay SPAU 331 C is a member of  
the supervision of the bus bar voltages of distri- the SPACOM product family and as such it is  
bution substations, both the residual voltage and provided with a serial communication port.  
the phase-to-phase voltages. The complete volt- Over the serial communication port and an  
age relay contains two protection relay modules. optional bus connection module of the SPA-  
The residual voltage is measured with a residual ZC_ series the relay can be connected to the  
overvoltage relay module type SPAU 1C6 in- optical fibre SPA bus and further to a substa-  
cluding two operation stages. The phase-to- tion level data communication and reporting  
phase voltage is measured with an undervoltage system and/or a remote control system.  
relay module type SPCU 3C15.  
Application  
3
When the residual voltage of the monitored tic the operate time is a function of the meas-  
network exceeds the set start level of the low-set ured voltage and the set time multplier k and  
Description of  
operation  
residual overvoltage stage U > the relay mod- the operate time is shorter the lower the meas-  
0
ule SPCU 1C6 starts. If the fault persists the ured voltage. The undervoltage stage 3U<< fea-  
U > stage trips after the set operate time t> has tures definite time characteristic only.  
0
elapsed. Correspondingly, the high-set residual  
overvoltage stage U >> starts when its set start By turning switch SG1/5 on the front panel of  
0
level is exceeded and trips when its set operate the undervoltage relay module SPCU 3C15 in  
time t>> has elapsed.  
position 1, the operation of the undervoltage  
stage U< can be blocked, when at least one of  
When one of the phase-to-phase voltages of the the measured phase-to-phase voltages falls be-  
monitored network falls below the set start level low 0.2 x U . Further, the operation of the un-  
n
of the undervoltage stage U<, the relay module dervoltage stage U< can be blocked by the start  
SPCU 3C15 starts. If the undervoltage situa- signal of the undervoltage stage 3U<<, switch  
tion persists the U< stage trips after the set (at SG1/8 in position 1.  
definite time mode) or calculated (at inverse  
time mode) operate time t< has elapsed. Corre- Tripping of both operation stages of the under-  
spondingly, the under voltage stage 3U<< starts voltage relay module and the residual voltage  
when all three phase-to-phase voltages simulta- relay module can be blocked by means of an  
neously fall below the set start level and trips external control signal applied to the control  
when its set operate time t<< has elapsed.  
input 10-11 of the relay. The operation stages  
to be blocked are selected with switches 4 and 5  
The operation of the undervoltage stage U< can of switch group SGB in the relay modules re-  
be given inverse time characteristic or definite spectively, see section "Signal flow diagram".  
time characteristic. At inverse time characteris-  
Fig. 1. Operation diagram for the undervoltage relay module SPCU 3C15 when selector switch  
SG1/5 = 1, i.e. starting of the undervoltage stage is blocked at voltage levels under 0.2 x U .  
n
U</U  
SS1  
TS1  
Set start level of the undervoltage stage U<  
Start signal of the undervoltage stage U<  
Trip signal of the undervoltage stage U<  
n
4
Connections  
Fig. 2. Connection diagram for the voltage relay SPAU 331 C.  
U
Auxiliary supply voltage  
Output relays  
aux  
A, B…F  
IRF  
SGR  
U1  
U2  
U3  
Self-supervision alarm  
Switchgroup for programming of starting and tripping signals  
Residual overvoltage relay module SPCU 1 C6  
Undervoltage relay module SPCU 3C15  
Unoccupied module place  
U4  
U5  
U6  
SPA-ZC_  
Rx/Tx  
Output relay module SPTR 6B3  
Power supply module SPGU 240A1 or SPGU 48B2  
Energizing input module SPTE 4B9  
Bus connection module  
Optical fibre receiver (Rx) and transmitter (Tx) of the bus connection module  
5
Fig. 3. Rear wiew of the voltage relay SPAU 331 C.  
6
Specification of input and output terminals  
Terminal Function  
number  
13-14  
13-15  
16-17  
16-18  
19-20  
19-21  
28-29  
28-30  
Phase-to-phase voltage U (100 V)  
12  
Phase-to-phase voltage U (110V)  
12  
Phase-to-phase voltage U (100 V)  
23  
Phase-to-phase voltage U (110 V)  
23  
Phase-to-phase voltage U (100 V)  
31  
Phase-to-phase voltage U (110 V)  
31  
Residual voltage U (100 V)  
0
Residual voltage U (110V)  
0
10-11  
61-62  
External blocking signal BS1  
Auxiliary supply voltage. The positive pole (+) of the DC supply is connected to  
terminal 61. The auxiliary supply voltage range is marked on the system front plate  
of the relay.  
63  
Protection earth (PE)  
65-66  
Tripping output relay A (heavy-duty) for all stages, U >, U >>, U< and 3U<<  
0
0
67-68-69 Alarm signal output relay B for stages stages U >>, U< and 3U<<  
0
73-74-75 Alarm and start signal output relay C for stage U<  
76-77-78 Alarm and start signal output relay D for stage 3U<<  
79-80-81 Alarm signal output relay E for stage U >  
0
70-71 -72 Self-supervision output relay F. In normal service conditions the contact gap 70-72  
is closed. In a fault situation the contact gap 71-72 closes.  
NOTE!  
Detailed information about the programming of starting and tripping signals in  
switchgroups SGB and SGR is given in the section "Signal flow diagram and  
conficuration switches".  
The voltage relay SPAU 331 C can be connected connectors of the optical fibres are blugged into  
to the optical fibre SPA data bus by means of a the counter connectors Rx and Tx of the bus  
9-pole D type connector located on the rear connection module and the optical fibres are  
panel of the voltage relay, and a matching bus linked from one protection relay to another and  
connection module type SPA-ZC_. The opto- to the control data communicator.  
7
3. The front panels of both relay modules are  
provided with a numerical display for indi-  
cation of measured and set values, two push-  
buttons marked STEP and RESET, a pro-  
gramming switchgroup SG1 for selection of  
relay functions and four setting knobs for op-  
eration values. The STEP push-button can  
be used for scanning through the measured  
and set values of the module and for presen-  
tation of the values concerned on the display  
of the module. The RESET push-button is  
used for resetting locally the red operation  
indicators for tripping. An unreset operation  
indicator does not affect the operation of the  
relay module and thus, the module is  
constantely operative.  
Operation  
indicators and  
push-buttons  
2
5
=
=
f = 50Hz  
n
U
U
100V 110V ( U )  
/
n
n
60Hz  
100V 110V ( U )  
/
0
SPAU 331 C  
U
aux  
1
2
3
4
5
6
7
8
–
80...265 V  
SGR  
~
18...80 V  
–
1
0
U1  
U2  
U3  
SPCU 1C6  
SPCU 3C15  
0
0
0
0
0
0
0
0
0
0
0
0
4. The front panels of the relay modules are pro-  
vided with a red LED used as a self-supervi-  
sion alarm indicator IRF which indicates that  
the self-supervision system has detected a per-  
manent fault in the protection relay. Further,  
the relay modules are provided with separate  
LED indicators on the front panel for indi-  
cation of the measured residual and phase-  
to-phase voltages.  
[
]
<
1
2
3
U
n
n
U
1
2
3
4
5
6
U
U
U
/
%
/
o
(
(
/
/
n
n
U
/
U
/
U
>
)
o
o
max  
U
n
>>  
)
]
3
U
n
<<  
U
n
[
>
>>  
4 t  
5 t  
t
t
%
[
U
/
min  
(U  
n
]
%
<
)
U
n
(
3
<<  
)
%
[
[
]
<
7 t  
8 t  
t
t
/
/
]
<<  
%
RS 613  
Ser.No.  
5. The cover of the protection relay case is made  
of transparent, UV-stabilized polycarbonate  
polymer and provided with three push-but-  
tons for scanning of the relay parameters by  
means of the separate displays of the mod-  
ules and the STEP push-buttons inside the  
cover. To enable resetting of the modules by  
means of the RESET push-buttons, the cover  
of the relay case must be opened using the  
locking screws for the case.  
Fig. 4. System front panel of the voltage relay  
SPAU 331 C.  
1. The green LED U on the system panel is  
aux  
lit when the power supply of the relay is op-  
erating.  
2. The relay modules are provided with two  
operating stages and each stage has its own  
yellow/red LED operation indicator. The op-  
eration indicator goes on with a yellow light  
when the operation stage starts and with a  
red light if the stage delivers a tripping signal  
as well.The LED indicators can be given self-  
reset or manual reset mode of operation. Nor-  
mally, when the stage resets, the red opera-  
tion indicator remains lit after being switched  
on to indicate by whitch stage the tripping  
was initiated.  
Detailed operation instructions are given in the  
manuals describing the individual relay mod-  
ules and in the document "General characteris-  
tics of C-type relay modules".  
8
In certain applications it may be necessary to control and blocking signals can be routed in-  
alter the factory settings of the configuration side the relay to obtain the protection functions  
switches of the relay SPAU 331 C. Fig. 5 illus- required by the intended application.  
trates schematically how the starting, tripping,  
Signal flow  
diagram and  
configuration  
switches  
(U3)  
(U2)  
(U1)  
SPC 000  
SPCU 3C15  
SPCU 1C6  
Fig. 5. Control signal routes between the relay modules of the voltage relay SPAU 331 C.  
9
Configuration  
switches  
Part of the starting and tripping signals from The switchgroups SGB on the PC-boards of the  
the relay modules are permanently connected relay modules SPCU 1C6 and SPCU 3C15 are  
to the output relays, whereas part of the output used for routing incoming external blocking sig-  
signals are routed through switchgroup SGR. nals to the protection stages to be blocked.  
The switchgroup is located at the front edge of  
the output relay module. The switches are set The functions of the switchgroups SGB and  
through the opening in the relay system front SGR are described in the tables as follows:  
panel.  
Switchgroup SGR on relay system panel  
Switch Function  
Factory  
setting  
SGR/1 Tripping signal from stage U< to output relay A  
SGR/2 Tripping signal from stage 3U<< to output relay A  
1
1
1
1
1
1
1
1
SGR/3 Tripping signal from stage U > to output relay A  
0
SGR/4 Tripping signal from stage U >> to output relay A  
0
SGR/5 Tripping signal from stage U< to output relay B  
SGR/6 Tripping signal from stage 3U<< to output relay B  
SGR/7 Starting signal from stage U< to output relay C  
SGR/8 Starting signal from stage 3U<< to output relay D  
Switchgroup SGB on PC-board in residual overvoltage relay module SPCU 1C6  
Switch Function  
Factory  
setting  
SGB/1 Not in use  
SGB/2 Not in use  
SGB/3 Not in use  
SGB/4 Blocking signal BS1 for blocking of U >-tripping  
SGB/5 Blocking signal BS1 for blocking of U >>-tripping  
SGB/6 Not in use  
SGB/7 Not in use  
SGB/8 Not in use  
0
0
0
0
0
0
0
0
0
0
Switchgroup SGB on PC-board in undervoltage relay module SPCU 3C15  
Switch Function  
Factory  
setting  
SGB/1 Not in use  
SGB/2 Not in use  
SGB/3 Not in use  
SGB/4 Blocking signal BS1 for blocking of U<-tripping  
SGB/5 Blocking signal BS1 for blocking of 3U<<-tripping  
SGB/6 Not in use  
SGB/7 Not in use  
SGB/8 Not in use  
0
0
0
0
0
0
0
0
10  
The power supply module is located behind the The power supply type is marked on the system  
system front panel of the relay together with front panel.  
the output relay module. The supply module is  
Power supply  
module  
a separate relay module and can be withdrawn The power supply module is a transformer con-  
after removal of the system front panel. The nected, i.e. galvanically separated primary and  
power supply module produces the voltages re- secondary circuits, flyback type rectifier. The  
quired by the relay modules from the auxiliary primary circuit is protected by a fuse F1, 1A  
supply voltage.  
(slow) in SPGU 240 A1 and 4A (fast) in SPGU  
48 B2, which are located on the printed circuit  
There are two types of power supply modules, board of the module.  
differing only in input voltage:  
When the power supply is on, a green LED in-  
dicator U is lit on the system panel. The su-  
SPGU 240 A1:  
Nominal voltage U = 110/120/230/240 V ac pervision of the supply voltages for the electron-  
aux  
n
U = 110/125/220 V dc  
ics is located on the regulating modules. The  
self-supervision alarm is given if any of the sec-  
ondary voltages differ more than 25% from the  
nominal value. Also, if the power supply mod-  
ule is missing, or if there is no auxiliary supply  
to the voltage regulator at all, an alarm is given.  
n
Operative range U = 80...265 V ac/dc  
SPGU 48 B2:  
Nominal voltage U = 24/48/60 V dc  
n
Operative range U = 18...80 V dc  
11  
The output relay module SPTR 6B3 is located plate. The module contains all output relays,  
behind the system front panel of the relay to- A...F, the control circuits of the relays as well as  
gether with the power supply module. The out- the electronic circuitry of the external control  
put relay module forms its own withdrawable inputs.  
Output relay  
module  
relay module after removal of the system front  
Fig. 6. Block diagram for the output relay module SPTR 6B3.  
TS1/U1 Tripping signal of U >-stage  
0
TS2/U1 Tripping signal of U >>-stage  
0
SS1/U2  
TS1/U2 Tripping signal of U>-stage  
SS2/U2 Starting signal of U<-stage  
TS2/U2 Tripping signal of U<-stage  
Starting signal of U>-stage  
BS1  
A
B
External blocking input signal to U<-stage  
Tripping output relay A (heavy-duty) for all stages, U >, U >>, U> and U<  
0
0
Alarm signal output relay B for stages U >>, U> and U<  
0
C
D
Alarm signal output relay C for stage U>  
Alarm signal output relay D for stage U<  
E
F
IRF  
SGR  
ENA  
Alarm signal output relay E for stage U >  
Self-supervision output relay F  
Self-supervision input signal  
Switchgroup for programming of starting and tripping signals  
Enable output signal from control circuits  
0
The input and output signals of the output re- be pointed out that the relay modules have to  
lay module are related to the fixed positions of be plugged into the relay case as illustrated in  
the relay modules which cannot be changed in the figure on the front page in order to secure  
the relay housing. The output signals from each that the connection diagram drawn for the re-  
relay module and PC-board location are wired lay assembly also would correspond to the physi-  
individually to the output relay module. It must cal function of the protective device.  
12  
Technical data  
(modified 2002-04)  
Energizing inputs  
Rated voltage U  
100 V  
110 V  
n
Terminal numbers  
- phase-to-phase voltage U  
- phase-to-phase voltage U  
- phase-to-phase voltage U  
13-14  
16-17  
19-20  
28-29  
13-15  
16-18  
19-21  
28-30  
12  
23  
31  
- residual voltage U  
0
Continuous voltage withstand  
2 x U  
<0.5 VA  
n
Burden at rated voltage U  
n
Rated frequency f , according to order  
50 Hz or 60 Hz  
n
External control inputs  
Terminal numbers  
External control voltage  
Current drain, typically  
10-11  
18...265 V dc or 80...265 V ac  
2...15 mA  
Contact outputs  
Tripping outputs  
Terminal numbers  
- trip relay A  
Rated voltage  
Continuous current carrying capacity  
Make and carry for 0.5 s  
Make and carry for 3 s  
65-66  
250 V dc/ac  
5 A  
30 A  
15 A  
Breaking capacity for dc when the control circuit  
time constant L/R ≤40 ms at 48/110/220 V dc  
5A /3A /1 A  
Signalling outputs  
Terminal numbers  
- alarm relay B  
- alarm relay C  
- alarm relay D  
- alarm relay E  
- self-supervision relay F  
Rated voltage  
Continuous current carrying capacity  
Make and carry for 0.5 s  
Make and carry for 3 s  
Breaking capacity for dc when the control circuit  
time constant L/R ≤40 ms at 48/110/220 V dc  
67-68-69  
73-74-75  
76-77-78  
79-80-81  
70-71-72  
250 V dc/ac  
5 A  
10 A  
8 A  
1A /0.25A /0.25A  
Auxiliary power supply  
Voltage range of power supply modules:  
SPGU 240 A1  
- Nominal voltage U  
110/120/230/240 V ac  
110/125/220 V dc  
80...265 V ac/dc  
n
- Operative range  
SPGU 48 B2  
- Nominal voltage U  
- Operative range  
24/48/60 V dc  
18...80 V dc  
n
Power consumption under quiescent/  
operation conditions  
10 W / 15 W  
13  
Residual overvoltage relay module SPCU 1C6  
See "Technical data" in the document 1MRS 750509-MUM EN for the relay module.  
Two-stage undervoltage relay module SPCU 3C15  
See "Technical data" in the document 1MRS 750588-MUM EN for the relay module.  
Data communication  
Transmission mode  
Coding  
Fibre-optic serial bus  
ASCII  
Data transfer rate, selectable  
Optical bus connection module powered from  
the host relay  
300, 1200, 2400, 4800 or 9600 Bd  
- for plastic-core cables  
SPA-ZC 21 BB  
- for glass-fibre cables  
SPA-ZC 21 MM  
Optical bus connection module powered from  
the host relay or from an external power source  
- for plastic-core cables  
SPA-ZC 17 BB  
SPA-ZC 17 MM  
- for glass-fibre cables  
Insulation Tests *)  
Dielectric test IEC 60255-5  
Impulse voltage test IEC 60255-5  
Insulation resistance measurement IEC 60255-5  
2 kV, 50 Hz, 1 min  
5 kV, 1.2/50 µs, 0.5 J  
>100 MΩ, 500 Vdc  
Electromagnetic Compatibility Tests *)  
High-frequency (1 MHz) burst disturbance test  
IEC 60255-22-1  
- common mode  
2.5 kV  
1.0 kV  
- differential mode  
Electrostatic discharge test IEC 60255-22-2 and  
IEC 61000-4-2  
- contact discharge  
6 kV  
8 kV  
- air discharge  
Fast transient disturbance test IEC 60255-22-4  
and IEC 61000-4-4  
- power supply  
4 kV  
2 kV  
- I/O ports  
14  
Emission tests  
Radiated and conducted emission according  
to EN 55011  
Class A  
EMC tests  
CE approved and tested according to  
EN 50081-2 and EN 50082-2  
Environmental conditions  
Service temperature range  
Temperature dependence  
-10...+55°C  
<0.2%/°C  
Transport and storage temperature range  
according to IEC 60068-2-8  
Damp heat test according to IEC 60068-2-30  
Degree of protection by enclosure of flush mounting  
relay case according to IEC 60529  
Weight of fully equipped relay  
-40...+70°C  
≤95%, 55°C, 6 cycles  
IP54  
5.5 kg  
*) The tests do not apply to the serial port, which is used exclusively for the bus connection module.  
15  
When the voltage relay SPAU 331 C is operat- If the relay malfunctions or the operating val-  
ing under the conditions specified in "Techni- ues differ from those specified, the relay should  
cal data", the relay requires practically no main- be overhauled. Minor measures can be taken by  
tenance. The voltage relay includes no parts or the customer but any major repair involving the  
components that are sensitive to physical or elec- electronics has to be carried out by the manu-  
trical wear under normal operating conditions. facturer. Please contact the manufacturer or his  
nearest representative for further information  
Maintenance  
and repair  
Should the temperature and humidity at the about checking, overhaul and recalibration of  
operating site differ from the values specified, the relay.  
or the atmosphere contain chemically active  
gases or dust, the relay should be visually in- The protection relay contains circuits sensitive  
spected in association with the secondary test- to electrostatic discharge. If you have to with-  
ing of the relay. This visual inspection should draw a relay module, ensure that you are at the  
focus on:  
same potential as the module, for instance, by  
touching the case.  
- Signs of mechanical damage to relay case and  
terminals  
Note!  
- Collection of dust inside the relay case; remove Protective relays are measuring instruments and  
with compressed air should be handled with care and protected  
- Signs of corrosion on terminals, case or inside against moisture and mechanical stress, espe-  
the relay  
cially during transport.  
Residual overvoltage relay module  
Two-stage undervoltage relay module  
Power supply modules  
SPCU 1C6  
SPCU 3C15  
Spare parts  
- U = 80...265 V ac/dc (operative range)  
SPGU 240 A1  
SPGU 48 B2  
aux  
- U = 18...80 V dc (operative range)  
aux  
Output relay module  
Interface module  
SPTR 6B3  
SPTE 4B9  
Case (including connection module)  
Bus connection module  
SPTK 4B9  
SPA-ZC 17_ or SPA-ZC 21_  
Delivery  
alternatives  
Type  
Equipment  
SPCU SPCU  
1C6 3C15  
SPAU 331 C1 Basic version, residual voltage and undervoltage module  
SPAU 331 C3 Basic version, residual voltage module alone  
SPAU 331 C5 Basic version, undervoltage module alone  
x
x
x
x
Delivery versions of the voltage relay SPAU 331 C.  
16  
The basic model of the protection relay case is by 80 mm and type SPA-ZX 303 by 120 mm.  
designed for flush-mounting. When required, When projecting mounting is preferred a relay  
the mounting depth of the case can be reduced case type SPA-ZX 306 is used. The relay case  
by using raising frames: type SPA-ZX 301 re- for projecting mounting is provided with front  
duces the depth by 40 mm, type SPA-ZX 302 connectors.  
Dimension  
drawings  
and mounting  
293  
259  
229  
226  
34  
30  
214 ±1  
a
b
Panel cut-out  
Raising frame  
a
b
SPA-ZX 301  
SPA-ZX 302  
SPA-ZX 303  
219  
74  
179 114  
139 154  
Fig. 6. Dimension and mounting drawings for overvoltage, undervoltage and residual voltage  
relay SPAU 331 C.  
The relay case is made of profile aluminium and rear panel. Each screw terminal is dimensioned  
2
finished in beige.  
for one or two wires of maximum 2.5 mm . A  
connection diagram adjacent to the terminal  
The rubber gasket fitted to the mounting collar blocks illustrates the connection of the termi-  
provides an IP54 degree of protection by enclo- nals.  
sure between the relay case and the mounting  
base.  
The 9-pole D-type connector is intended for  
serial communication of the relay. A 25-pole D-  
The hinged cover of the case is made of trans- type connector is used for connecting the dis-  
parent, UV-stabilized polycarbonate polymer turbance recorder module via the RS 232 C port  
and provided with two sealable locking screws. on the front panel to an output device.  
The rubber gasket of the cover provides an IP54  
degree of protection between the case and the The bus connection modules (SPA-ZC 17_ or  
cover.  
SPA-ZC 21_) and fibre-optic cables recom-  
mended by the manufacturer should always be  
The required input and output connections are used for the serial communication.  
made to the multi-pole terminal blocks on the  
17  
Voltage relay  
Order numbers  
and ordering  
information  
SPAU 331 C1  
SPAU 331 C3  
SPAU 331 C5  
RS 613 031 - AA, CA, DA, FA  
RS 613 033 - AA, CA, DA, FA  
RS 613 035 - AA, CA, DA, FA  
The letter combinations of the order number denote the rated frequency f and  
n
the operative range of the auxiliary supply voltage:  
AA: f = 50 Hz, U = 80...265 V ac/dc  
n
aux  
CA: f = 50 Hz, U = 18...80 V dc  
n
aux  
DA: f = 60 Hz, U = 80...265 V ac/dc  
n
aux  
FA: f = 60 Hz, U = 18...80 V dc  
n
aux  
Ordering example:  
1. Number and type designation  
2. Order number  
3. Rated frequency  
4. Auxiliary voltage  
5. Accessories  
5 pcs SPAU 331 C1  
RS 613 031 - AA  
f = 50 Hz  
n
U
= 110 V dc  
aux  
5 raising frames SPA-ZX 301  
5 bus connection modules SPA-ZC 17 MM2A  
–
6. Special requirements  
18  
SPCU 1C6  
Residual overvoltage relay module  
User´s manual and Technical description  
B
U
U
IRF  
o
STEP  
10  
0.5  
50  
> [%]  
U
U
o
n
STEP  
SG1  
2
20  
>
[s]  
t
1
2
3
4
5
6
7
8
0.05  
1.0  
80  
>>[%]  
U
U
o
n
0
1
10  
RESET  
0.5  
>>  
[s]  
t
0.05  
1.0  
U
>
U
>>  
o
o
SPCU 1C6  
1MRS 750509-MUM EN  
SPCU 1C6  
Residual overvoltage  
relay module  
Issued 96-12-02  
Version A (replaces 34 SPCU 2 EN1)  
Checked L-W U  
Approved TK  
Data subject to change without notice  
Features .......................................................................................................................... 2  
Description of operation................................................................................................. 3  
Block diagram................................................................................................................. 4  
Front panel ..................................................................................................................... 5  
Operation indicators....................................................................................................... 5  
Settings ........................................................................................................................... 6  
Selector switches ............................................................................................................. 6  
Measured data................................................................................................................. 7  
Recorded information..................................................................................................... 8  
Menu chart ..................................................................................................................... 9  
Technical data ............................................................................................................... 10  
Serial communication parameters ................................................................................. 11  
Event codes.............................................................................................................. 11  
Data to be transferred over the serial bus ................................................................. 12  
Fault codes.................................................................................................................... 15  
Contents  
Low-set residual overvoltage stage U > with Local display of measured and set values as well  
definite time operation characteristic, setting as data recorded at the moment of a relay op-  
Features  
0
ranges 2...20% x U and 10...100% x U  
eration  
n
n
High-set residual overvoltage stage U >> with Flexible selection of special operational features  
0
definite time operation characteristic, setting for particular applications  
ranges 10...80% x U or 2...16% x U  
n
n
Continuous self-supervision of hardware and  
The operation of the high-set residual over- software. At a permanent fault the alarm out-  
voltage stage can be set out of function by se- put relay picks up and the other outputs are  
lecting the setting ∞, infinitive  
blocked.  
Effective suppression of harmonics of the input  
energizing voltages  
2
The residual overvoltage relay module type The setting range of the start value of the low-  
SPCU 1C6 is used in a variety of different pro- set stage U > is selected with switch SG1/5.Two  
Description of  
operation  
0
tection relay units where it constitutes a non- setting ranges are available, that is 2...20% x U  
n
directional general earth-fault protection mod- and 10...100% x U .  
n
ule which measures the residual voltage of the  
electrical power system.  
The setting range of the start value of the high-  
set stage U >> is selected with switch SG1/6.Two  
0
The residual overvoltage module contains two setting ranges are available, that is 2...16% x U  
n
overvoltage stages,that is a low-set stage U > and or 10...80% x U .  
0
n
a high-set stage U >>.  
0
The operation of the two operating stages is  
The low-set or high-set voltage stage starts if provided with a so called latching facility, which  
the measured voltage exceeds the set start value means that the operation output is kept alerted,  
of the stage concerned. When starting, the con- although the signal which caused the operation  
cerned stage delivers a starting signal SS1 or SS2 disappears. The latching function is selected  
and simultaneously the operation indicator of with switch SG1/4. The latched output and the  
the stage is lit with yellow colour. If the over- output relay can be reset in three different ways;  
voltage situation lasts long enough to exceed the (i) by pressing push buttons STEP and RESET  
set operation delay, the stage that started also simultaneously, (ii) via the serial inter-face us-  
operates generating a trip signal, TS1 alt. TS2. ing the command V101 or (iii) via the serial  
The operation indicator of the stage that oper- interface using the command V102. When al-  
ated turns red. The start and operation indica- ternative (ii) is used all recorded information is  
tors are provided with memory control, which maintained but if the alternatives (i) or (iii) is  
means that they can be given the self-reset or used the recorded information is erased.  
the latching mode of operation. The latching  
indicators are reset with the RESET push-but- The residual voltage signal input is provided  
ton on the front panel or by means of the com- with an effective filter by means of which  
mand V101 or V102 via the serial port.  
hamonics of the measured residual voltage is  
suppressed, see Fig. 1.  
The tripping of the low-set overvoltage stage  
U > can be blocked by routing a blocking sig-  
nal BTS1 to the low-set stage. Similarly, the trip-  
0
dB 10  
0
ping of the high-set stage U >> is blocked by a  
0
blocking signal BTS2. The blocking signals are  
routed by means of switchgroup SGB on the  
PC board of the relay module.  
-10  
-20  
-30  
-40  
-50  
-60  
The setting range of the operation time t> of  
the low-set overvoltage stage U > is selected with  
0
switches SG1/1 and SG1/2. Three setting ranges  
are available.  
Switches SG1/7 and SG1/8 are used for select-  
ing the setting range for the operation time t>>  
0
1
2
3
4
5
6
7
of the high-set stage U >>. Three setting ranges  
f/fn  
0
are available.  
Fig. 1. Filter characteristics of the residual volt-  
age input circuit.  
3
Block diagram  
Fig. 2. Block schematic diagram of the residual overvoltage relay module SPCU 1C6.  
U
Measured residual voltage  
0
BS1, BS2, BS3 Incoming external blocking signals  
BTS1  
BTS2  
SG1  
SG2  
SGB  
SS1  
TS1  
SS2  
TS2  
Y
Blocking of tripping of stage U >  
0
Blocking of tripping of stage U >>  
0
Selector switchgroup on the relay module front panel  
Function selector switchgroup for the operation indicators  
Selector switchgroup on the PC board for blocking signals  
Start signal of stage U >  
0
Trip signal of stage U >  
0
Start signal of stage U >>  
0
Trip signal of stage U >>  
0
Yellow indicator, starting  
Red indicator, tripping  
R
NOTE!  
ule.The signals wired to the terminals are shown  
in the signal diagram in the manual of the con-  
cerned protection relay unit.  
All input and output signals of the relay mod-  
ule are not necessarily wired to the terminals of  
every protection relay unit utilizing this mod-  
4
Front panel  
B
U
Simplified device symbol  
U
IRF  
o
Self-supervision alarm  
indicator  
Voltage measurement indicator  
Start voltage setting knob  
Display for set and  
measured values  
STEP  
10  
0.5  
50  
> [%]  
U
U
o
n
STEP  
SG1  
2
20  
and indicator of stage U >  
0
Display step push-button  
>
[s]  
t
Operation time setting knob  
1
2
3
4
5
6
7
8
0.05  
1.0  
80  
and indicator of stage U >  
0
Selector switchgroup  
Switchgroup indicator  
Reset push-button  
>>[%]  
U
U
o
n
Start voltage setting knob and  
0
1
10  
indicator of stage U >>  
0
RESET  
0.5  
>>  
[s]  
t
Operation time setting knob  
0.05  
1.0  
U
and indicator of stage U >>  
0
>
U
>>  
o
o
Operation indicators  
Relay module type  
designation  
SPCU 1C6  
Fig. 3. Front panel of the residual overvoltage relay module SPCU 1C6.  
Both voltage stages have their own yellow/red An unreset operation indicator does not affect  
LED indicators. Yellow light indicates starting the protective functions of the relay module.  
of the concerned overvoltage stage and red light  
Operation  
indicators  
indicates that the overvoltage stage has operated. The self-supervision alarm indicator IRF indi-  
cates that the self-supervision system has de-  
The four LED indicators can, independently of tected a permanent internal relay fault. The in-  
one another, be given a non-latching or a latch- dicator is lit with red light shortly after the fault  
ing mode of operation. The latching mode has been detected. At the same time the relay  
means that the indicator remains lit after being module puts forward a control signal to the self-  
switched on, although the overvoltage stage, supervision system output relay of the protec-  
which controls the indicator, resets. If, for in- tion relay unit.  
stance, the yellow start indicator is given the  
latching mode and the red indicator the non- Additionally, in most fault cases, a fault code  
latching mode, the yellow indicator is lit, when showing the nature of the fault appears on the  
the stage starts, which then turns red if and when display of the module. The fault code, consist-  
the stage operates. When the overvoltage stage ing of a red number one (1) and a green three-  
resets only the yellow indicator remains lit. The digit code number, indicates what type of in-  
indicators, which have been given the latching ternal fault that has been detected. When a fault  
mode, are reset locally by pushing the RESET message appears, the fault code should be noted  
push-button or by remote control over the SPA down for later use when relay overhaul or re-  
bus using the command V102.  
pair is to be carried out.  
5
The setting values are shown by the three tor below the setting knob shows, when lit,  
rightmost digits of the display. A LED indica- which setting value is presented on the display.  
Settings  
U >/U  
0
Start voltage value of the U > stage, expressed as a percentage of the rated voltage  
n
0
of the energizing input used. The setting range is 2...20% x U when SG1/5 = 0,  
n
and 10...100% x U when SG1/5 = 1.  
n
t> [s]  
Operate time of the U > stage, expressed in seconds. The setting range is deter-  
mined by the position of switches SG1/1 and SG1/2. Selectable operate time set-  
0
ting ranges 0.05...1.00 s, 0.5...10.0 s and 5...100 s.  
U >>/U Start voltage value of the U >> stage, expressed as a percentage of the rated voltage  
0
n
0
of the energizing input used. The setting range is 10...80% x U when SG1/6 = 0,  
n
and 2...16% x U when SG1/6 = 1. The setting ∞, infinite, (displayed as - - -) sets  
n
the high-set stage U >> out of operation.  
0
t>> [s]  
Operate time of the U >> stage, expressed in seconds. The required setting range,  
0.05...1.00 s, 0.5...10.0 s or 5.00...100 s, is selected with switches SG1/7 and  
0
SG1/8.  
Further, the checksum of the selector switch- eration of the switchgroup SG1 can be verified.  
group SG1 is shown on the display when the An example of how the checksum is calculated  
LED indicator below the switchgroup is lit. By is shown in the manual "General characteristics  
means of the displayed checksum and the of C type relay modules".  
checksum manually calculated the proper op-  
Additional functions required by individual switches, 1...8, as well as the switch positions 0  
applications are selected by means of the func- and 1 are marked on the relay module front  
tion selector switches of switchgroup SG1 lo- panel.  
Selector switches  
cated on the front panel. The numbering of the  
Switch Function  
SG1/1 Selection of setting range for the operate time t> of low-set stage U >.  
0
SG1/2  
SG1/1 SG1/2 Operate time t>  
0
1
0
1
0
0
1
1
0.05...1.00 s  
0.5...10.0 s  
0.5...10.0 s  
5...100 s  
SG1/3 Not in use. Has to be set in position 0.  
SG1/4 Selection of latching function for the tripping signals TS1 and TS2.  
When SG1/4 = 0, the trip signals reset to the initial state (= the output relay drops off),  
when the measuring signal causing the operation falls below the set start voltage level.  
When SG1/4 = 1, the trip signals remain activated (= the output relay remains picked  
up), although the measuring signal falls below the set start voltage level. Then the trip  
signals are reset by pressing the push-buttons STEP and RESET simultaneously or  
with the commands V101 or V102 via the serial port.  
SG1/5 Selection of setting range for the start voltage value of the low-set stage U >.  
0
When SG1/5 = 0, the setting range is 2...20% x U .  
n
When SG1/5 = 1, the setting range is 10...100% x U .  
n
6
Switch Function  
SG1/6 Selection of setting range for the start voltage value of the high-set stage U >>.  
0
When SG1/6 = 0, the setting range is 10...80% x U and ∞, infinite.  
n
When SG1/6 = 1, the setting range is 2...16% x U and ∞, infinite.  
n
SG1/7 Selection of setting range for the operate time t>> of the high-set stage U >>.  
0
SG1/8  
SG1/7 SG1/8 Operate time t>>  
0
1
0
1
0
0
1
1
0.05...1.00 s  
0.5...10.0 s  
0.5...10.0 s  
5...100 s  
Switchgroup SG2 is a so called software switch- eration can be separately set for each indicator.  
group, which is located in the third submenu The mode of operation is set by means of the  
of switchgroup SG1. The mode of operation, checksum, which can be calculated from the  
i.e. self-reset or manually reset, of the LED in- following table. Normally the start indications  
dicators U > and U >> is determined by the are self-reset and the operation indications  
0
0
switches of switchgroup SG2. The mode of op- manually reset.  
Indicator Manually reset  
Start indicator U >  
Factory default  
1
2
4
8
0
2
0
8
0
Operation indicator U >  
0
Start indicator U >>  
0
Operation indicator U >>  
0
Checksum  
15  
10  
The PC board of the relay module contains a in various protection relay units. Instructions  
switchgroup SGB including switches 1...8. The for setting of switchgroup SGB are given in the  
switches 1...3 are used for selecting the starting user's manual of the different protection relay  
signals, whereas switches 4...8 are used for rout- units.  
ing the blocking signals to the voltage module  
The measured values are displayed by the three data to be displayed are indicated by a lit LED  
rightmost digits on the display. The measured indicator.  
Measured data  
Indicator Measured data  
U
0
Residual voltage measured by the relay module, expressed as a percentage of the  
rated voltage of the energizing input used.  
7
The leftmost red digit displays the address  
number of the register, the rightmost three green  
digits display the recorded data.  
Recorded  
information  
Register/ Recorded data  
STEP  
1
Maximum residual voltage measured by the module, as a percentage of the rated  
voltage U of the used energizing input. If the module operates, the voltage value at  
n
the moment of operation is stored in the memory. Any new operation erases the old  
value and updates the register with the new value. The same thing happens if the  
measured voltage exceeds a previously recorded maximum value.  
2
3
4
Number of starts of the low-set overvoltage stage U >, n (U >) = 0...255.  
0
0
Number of starts of the high-set overvoltage stage U >>, n (U >>) = 0...255.  
0
0
Duration of the latest start situation of stage U > as a percentage of the set operate  
0
time t>. Any new start resets the counter, which then starts counting from zero.  
When the stage has operated, the counter reading is 100.  
5
0
Duration of the latest start situation of stage U >> as a percentage of the set operate  
time t>>. Any new start resets the counter, which then starts recounting from zero.  
When the stage has operated, the counter reading is 100.  
0
Display of blocking signals and other external control signals. The rightmost digit  
indicates the state of the blocking inputs of the relay module. The following states  
may be indicated:  
0 = no blockings  
1 = operation of the U > stage blocked  
0
2 = operation of the U >> stage blocked  
0
3 = operation of both stages blocked  
In this register the second digit from he right is constantly zero. The leftmost digit  
indicates the state of the remote reset control input, if applicable. The following  
states may be indicated:  
0 = remote reset control input not energized  
1 = remote reset control input energized  
From this register it is possible to move on to the TEST mode, where the start and  
operation signals of the module can be activated one by one. For further details see  
manual "General characteristics of C type relay modules".  
A
The address code of the protection relay module in the serial communication sys-  
tem. The serial communication is broken if the relay module is given the address  
code 0 (zero). Register A is provided with the following subregisters:  
1. Selection of data transfer rate for the serial communication. Selectable values  
300, 1200, 2400, 4800 and 9600 Bd. Default value 9600 Bd.  
2. Bus communication monitor. If the relay module is connected to a serial com-  
munication system and the serial communication system is in operation the coun-  
ter of the bus communication monitor will show the value 0 (zero). If the com-  
munication is broken the numbers 0…255 are scrolling in the counter.  
3. Password required when changing relay module settings via remote control  
Registers 1...5 are set to zero by pressing the data transfer rate of the serial communication  
push buttons STEP and RESET simultaneously and the password are not erased by a supply  
or by remote control using the command V102. voltage interruption. Instructions for setting the  
The register values are also erased if the auxil- address code and the data transfer rate are given  
iary power supply of the module is interrupted. in the manual "General characteristics of C type  
The address code of the relay module, the set relay modules".  
8
Menu chart  
MAIN MENU  
SUBMENU  
STEP 0.5 s  
RESET 1 s  
BACKWARD STEP 0.5 s  
FORWARD STEP 1 s  
Display off. Normal state  
SUBMENU  
Residual voltage U  
= Value that can be set in the setting mode  
0
S
T
E
P
Remotely set start  
voltage x p1  
Alerted start voltage,  
U >  
Remotely set  
percentage p1  
stage  
U >  
0
0
B
A
C
K
W
A
R
D
Remotely set ope-  
ration time t> x p2  
Alerted operation time t>,  
Remotely set  
percentage p2  
stage U >  
0
Remotely set start  
Alerted start voltage,  
Remotely set  
percentage p3  
U >>  
voltage U >> x p3  
stage  
0
0
.5  
s
Remotely set ope-  
ration time t>> x p4  
Alerted operation time t>>,  
U >>  
stage  
Remotely set  
percentage p4  
M
A
I
0
N
Alerted checksum,  
switchgroup SG1  
Remotely set  
checksum of SG1  
Remotely set  
checksum of SG1  
Chechsum  
of SG2  
M
E
N
U
Recorded maximum value of the  
1
2
3
U
residual voltage  
0
S
T
E
P
Number of starts of the  
residual voltage stage U >  
0
F
O
R
W
A
R
D
Number of starts of the  
U >>  
residual voltage stage  
0
Duration of the latest start  
1
s
4
5
0
A
U >  
event stage  
0
Duration of the latest start  
event of stage U >>  
0
SS1  
TS1 SS2 TS2  
Incoming blocking signals  
IRF  
000  
0
Bus communication  
monitor 0 ... 255  
Relay module  
address code  
Data transfer  
rate (Bd)  
Password  
Fig. 4. Main menu and submenus of the residual overvoltage relay module SPCU 1C6.  
The procedure for entering a submenu or a set- scribed in detail in "General characteristics of  
ting mode and configuring the module is de- C type relay modules".  
9
Technical data  
Low-set overvoltage stage U >  
0
Start voltage U >  
Start time, typically  
2...20% x U or 10...100% x U  
70 ms  
0
n
n
Operate time  
Reset time  
0.05...1.00 s, 0.5...10.0 s or 5...100 s  
<100 ms  
Drop-off/pick-up ratio, typically  
Operate time accuracy  
Operation accuracy  
0.96  
±2% of set value or ±40 ms  
- 10...100% x U  
±3% of set value  
±5% of set value  
n
- 2...20% x U  
n
High-set overvoltage stage U >>  
0
Start voltage U >>  
10...80% x U and ∞, infinite or  
0
n
2...16% x U and ∞, infinite  
n
Start time, typically  
Operate time  
70 ms  
0.05...1.00 s, 0.5...10.0 s or 5...100 s  
Reset time  
<100 ms  
0.96  
±2% of set value or ±40 ms  
Drop-off/pick-up ratio, typically  
Operate time accuracy  
Operation accuracy  
- 10...80% x U  
±3% of set value  
±5% of set value  
n
- 2...16% x U  
n
10  
The substation level control data communica- event mask is formed by multiplying the above  
tor is able to read, over the SPA serial bus, the numbers either with 0, event not included or 1,  
event messages of the relay module, e.g. start event included in reporting and by adding the  
and trip messages, from the residual overvoltage products, see instructions for checksum calcu-  
relay module SPCU 1C6. The events can be lation.  
Serial  
communication  
parameters  
Event codes  
printed out in the format: time (ss.sss) and event  
code. The event codes of the relay module are The event mask may take a value within the  
E1...E8 , E50 and E51. Additional event codes range 0...255. The default value of the residual  
relating to the data communication are gener- overvoltage relay module SPCU 1C6 is 85,  
ated by the data communication equipment.  
which means that any start or operation event  
is included in the reporting, but no resettings.  
The event codes E1...E8 and the events repre- The event codes E50...E54 and the events rep-  
sented by these can be included in or excluded resented by these cannot be excluded from the  
from the event reporting by writing, via the SPA reporting.  
bus, an event mask (V155) to the relay module.  
The event mask is a binary number coded to a Event codes of residual voltage relay module  
decimal number. The event codes E1...E8 are SPCU 1C6:  
represented by the numbers 1, 2, 4...128. The  
Code Event  
Weighting Default  
coefficient setting  
E1  
E2  
E3  
E4  
E5  
E6  
E7  
E8  
Starting of stage U >  
1
2
4
1
0
1
0
1
0
1
0
0
Starting of stage U > reset  
0
Tripping of stage U >  
0
Operation of stage U > reset  
8
0
Starting of stage U >>  
16  
32  
64  
128  
0
Starting of stage U >> reset  
0
Tripping of stage U >>  
0
Operation of stage U >> reset  
0
Default value of event mask V155  
85  
E50  
E51  
E52  
E53  
Restart of microprocessor  
Overflow of event register  
Temporary interruption in the data communication  
No response from the relay module over the data  
communication bus  
The relay module responds again over the data  
communication bus  
*
*
*
-
-
-
*
*
-
-
E54  
0 not included in the event reporting  
1 included in the event reporting  
* no code number, always included in event reporting  
-
cannot be set  
NOTE!  
In the SPACOM system the event codes E52...  
E54 are generated by the station level control  
data communicator, e.g. type SRIO 1000M.  
11  
Data to be  
transferred over  
the serial bus  
In addition to the event code data transfer, the module over the serial communication bus.  
input data (I data), output data (O data), set- Further, part of the data can be changed over  
ting values (S), memorized data (V data) and the SPA bus by separate commands. All data  
some other data can be read from the relay information is available in channel 0.  
Data  
Code  
Data  
direct.  
Values  
Input data  
Energizing input voltage  
Blocking of operation of stage U >  
I1  
I2  
R
R
0...250% x U  
0 = no blocking  
n
0
1 = operation of stage U >  
0
blocked  
Blocking of operation of stage U >>  
I3  
R
0 = no blocking  
1 = operation of stage I >>  
0
0
blocked  
Output data  
Starting of stage U >  
O1  
O2  
O3  
O4  
R
R
R
R
0 = stage U > not started  
0
0
1 = stage U > started  
0
Operation of stage U >  
0 = stage U > not tripped  
0
0
1 = stage U > tripped  
0
Starting of stage U >>  
0 = stage U >> not started  
o
0
1 = stage U >> started  
0
Operation of stage U >>  
0 = stage U >> not tripped  
0
0
1 = stage U >> tripped  
0
Setting values  
Alerted start value of stage U >  
Alerted operate time of stage U >  
S1  
S2  
S3  
R
R
R
2...100% x U  
0.05...100 s  
0
n
0
Alerted start value of stage U >>  
2...80% x U  
0
n
999 = ∞, infinite  
0.05...100 s  
0...255  
Alerted operate time of stage U >>  
Alerted checksum of switchgroup SG1  
S4  
S5  
R
R
0
Start value of stage U >,  
set with the setting knob  
S11  
S12  
S13  
S14  
S15  
R
R
R
R
R
2...100% x U  
0.05...100 s  
0
n
Operate time of stage U >,  
0
set with the setting knob  
Start value of stage U >>,  
2...80% x U  
n
999 = ∞, infinite  
0.05...100 s  
0
set with the setting knob  
Operate time of stage U >>,  
0
set with the setting knob  
Checksum of switchgroup SG1,  
set with the switches  
0...255  
Remotely setting percentage of the  
S21  
R, W  
R, W  
R, W  
R, W  
R, W  
0...999%  
0...999%  
0...999%  
0...999%  
0...255  
start value of stage U >  
0
Remotely setting percentage of the operate S22  
time of stage U > or time multiplier  
0
Remotely set percentage for the  
S23  
S24  
start value of stage U >>  
0
Remotely setting percentage for the  
operate time of stage U >>  
0
Remotely set checksum of switchgroup SG1 S25  
12  
Data  
Code  
Data  
direct.  
Values  
Remotely set start value of stage U >  
Remotely set operate time of stage U >  
S31  
S32  
S33  
R
R
R
2...100% x U  
0.05...100 s  
0
n
0
Remotely set start value of stage U >>  
2...80% x U  
0
n
999 = ∞, infinite  
0.05...100 s  
0...255  
Remotely set operate time of stage U >>  
Remotely set checksum of switchgroup SG1 S35  
S34  
R
R
0
Max. measured voltage or voltage  
at operation  
V1  
R
0...250% x U  
n
Number of starts of stage U >  
V2  
V3  
V4  
R
R
R
0...255  
0...255  
0...100%  
0
Number of starts of stage U >>  
0
Duration of the latest start  
situation of stage U >  
Duration of the latest start  
0
V5  
R
0...100%  
situation of stage U >>  
0
Resetting of output relays and  
operation indicators  
Resetting of output relays and operation  
indicators and erasing of recorded data  
V101  
V102  
W
W
1 = output relays and  
operation indicators reset  
1 = output relays and  
operation indicators  
reset and registers  
(codes V1…V5) erased  
Remote control of settings  
V150 R, W  
0 = setting with knobs  
S11...S15 activated  
1 = remote settings  
S31...S35 activated  
Event mask word  
V155 R, W  
V156 R, W  
0...255, see section  
"Event codes"  
0…15, see section  
"Selector switches"  
Manual reset or self-reset mode of  
operation of the LED indicators  
Opening of password for remote settings  
Changing or closing of password  
for remote settings  
V160  
V161  
W
W
1...999  
0...999  
Activation of self-supervision function  
V165  
W
1 = self-supervision output  
is activated and the IRF  
indicator turns on in  
about 5 seconds, where-  
after the self-supervision  
system and the IRF  
indicator reset  
Internal fault code  
V169  
V200  
R
R
0…255  
1...254  
Data communication address of  
the relay module  
Program version  
V205  
R
070_  
13  
Data  
Code  
Data  
direct.  
Values  
Type designation of the relay module  
Reading of event register  
F
L
R
R
SPCU 1C6  
Time, channel number  
and event code  
Re-reading of event register  
B
R
R
Time, channel number  
and event code  
Reading of module status data  
C
0 = normal state  
1 = module been subject  
to automatic reset  
2 = overflow of event register  
3 = events 1 and 2 together  
Resetting of module status data  
Time reading or setting  
C
T
W
0 = resetting  
R, W  
00.000...59.999 s  
R = data to be read from the module  
W = data to be written to the module  
The data transfer codes L, B, C andT have been The settings S21...S25 allow reading or writ-  
reserved for the event data transfer between the ing. A condition for writing is that the pass-  
relay module and the control data communi- word V160, for remote setting has been opened.  
cator.  
The variables S31...S35 contain the remote set-  
ting values.  
The event register can be read by the L com-  
mand only once. Should a fault occur, for ex- When the values of the variables S21...S24 are  
ample, in the data transfer, it is possible, by us- to be changed, the variables can be given a per-  
ing the B command, to re-read the contents of centage factor within the range 0...999. It is  
the event register once already read by means of possible to alter a setting value beyond the set-  
the L command. When required, the B com- ting ranges specified in the technical data of the  
mand can be repeated.  
relay module. However, the validity of the set-  
ting values are guaranteed only within the set-  
The setting values S1...S5 are the alerted set ting ranges specified in the technical data.  
values currently used by the protection relay  
module. These values are set either by remote Activation of the self-supervision function  
control or by means of the setting knobs. The (V165) prevents the relay module from operat-  
values S11...S15 are set with the setting knobs ing as long as the self-supervision output is ac-  
and the selector switches. Variables S21...S25 tivated and the IRF indicator is lit.  
are set as percentage values via remote control.  
14  
Once the self-supervision system has detected a a red digit one (1) and a green code number  
permanent relay fault, the IRF LED on the front that indicates the fault type. The fault code  
panel of the module is lit, and at the same time should be recorded and stated when service is  
the normally operated signal relay of the self- ordered.  
Fault codes  
supervision system drops off.  
The fault codes of the residual overvoltage relay  
In most fault situations an auto-diagnostic fault module SPCU 1C6 are explained in the follow-  
code is shown on the relay display. The fault ing table:  
code cannot be reset. The fault code consists of  
Fault code Explanation  
4
30  
50  
Faulty output relay path or missing output relay card  
Faulty program memory (ROM)  
Faulty working memory (RAM)  
195  
131  
67  
203  
139  
75  
Too low a value in reference channel with multiplier 1  
Too low a value in reference channel with multiplier 5  
Too low a value in reference channel with multiplier 25  
Too high a value in reference channel with multiplier 1  
Too high a value in reference channel with multiplier 5  
Too high a value in reference channel with multiplier 25  
No interruptions from the A/D-converter  
253  
15  
SPCU 3C15  
Undervoltage relay module  
User´s manual and Technical description  
U<  
3U<<  
U
U
U
IRF  
12 23 31  
STEP  
0.8  
U<  
STEP  
SG1  
U
n
1.2  
0.4  
0.5  
t
[ ]  
< s  
k<  
1
2
3
4
5
6
7
8
0.1  
1.0  
0.6  
3U <<  
U
n
0
1
0.1  
1.2  
1.0  
RESET  
0.5  
[ ]  
t << s  
0.1  
U<  
U<<  
SPCU 3C15  
1MRS 750588-MUM EN  
SPCU 3C15  
Undervoltage  
relay module  
Issued 96-12-02  
Version A (replaces 34 SPCU 4 EN1)  
Checked LWU  
Approved TL  
Data subject to change without notice  
Features .......................................................................................................................... 2  
Description of operation................................................................................................. 3  
Block diagram................................................................................................................. 4  
Front panel ..................................................................................................................... 5  
Start and operation indicators......................................................................................... 5  
Settings ........................................................................................................................... 6  
Selector switches ............................................................................................................. 6  
Measured data ................................................................................................................ 7  
Recorded information..................................................................................................... 8  
Menu chart ................................................................................................................... 10  
Inverse time characteristics ........................................................................................... 11  
Technical data .............................................................................................................. 12  
Serial communication parameters ................................................................................. 13  
Event codes ............................................................................................................. 13  
Data to be transferred over the serial bus ................................................................. 14  
Fault codes.................................................................................................................... 17  
Contents  
Three-phaseundervoltagestageU<whichoper- OperationofstagesU<and3U<<canbeblocked  
ates when one of the three energizing voltages by an external control signal  
falls below the set start value  
Features  
Starting and operation of stage U< can be auto-  
Three-phase undervoltage stage 3U<< which matically blocked on loss of energizing voltage  
operates when all three energizing voltages si-  
multaneously fall below the set start value  
Digital display of measured and set values and  
data recorded at the moment of operation  
The undervoltage stage U< can be given either  
definite time or inverse time operation charac- Continuous self-supervision of hardware and  
teristic  
software of the relay module including self-  
diagnostics  
Starting of stage U< can be blocked by an  
external control signal  
2
The undervoltage relay module SPCU 3C15 acteristic, definite time or inverse time. The  
measures three voltages. The module includes inverse time operation of stage U< has one  
two undervoltage stages. One of the stages ope- operation characteristic.  
Description of  
operation  
ratesifatleastoneofthethreemeasuredvoltages  
falls below the set start value, while the other If all the three voltages measured by the module  
stage operates when all of the three voltages fall fall below the set start value of the 3U<< stage,  
below the set start value.  
the module delivers a start signal SS2 when the  
set start time has elapsed. The start time of the  
If one of the three voltages measured by the 3U<< stage is selected by means of switch SG1/6.  
module falls below the set start value of stage Two alternative start time values are available.  
U<, the module delivers a start signal SS1 after  
the set start time has elapsed. The start time of After the preset operate time t<<, an operation  
stage U< is selected by means of the selector signalTS2isdeliveredbytheundervoltagestage  
switches 1 and 2 of switchgroup SG1 and four 3U<<, if all the three voltages remain below the  
alternative start time values are available.  
set start value. One out of the two setting ranges  
available for the operate time is selected with  
After the preset operate time t<, the under- switch SG1/7.  
voltage stage U< delivers an operation signal  
TS1. The setting range of the operate time, To avoid unwanted operations, for instance,  
0.1…1.0 s or 1…10 s, is selected by means of during an auto-reclose sequence, starting and  
switch SG1/4. If the operation of the U< stage operation of the undervoltage stage U< can be  
isbasedoninversetimeoperationcharacteristic, blocked by means of switch SG1/5. The bloc-  
the operate time depends on how much the king function is activated if one of the three  
voltage falls below the set start value. Switch measured voltages falls to a value below 0.2 x U .  
n
SG1/3 is used for selecting the operation char- This function is illustrated in fig. 1.  
Fig. 1. Operation characteristic of stage U< of the undervoltage relay module, when the selector  
switch SG1/5 = 1.  
The operation of stage U< can be blocked when meansofswitchgroupSGBontherelaymodule.  
stage 3U<< starts. The selection is made with Instructionsforsettingtheswitchgrouparegiven  
switch SG1/8.  
intheuser'smanualoftheconcernedprotection  
relay unit and in the diagram illustrating the  
The operation of both stages can be blocked by signals between the relay modules of the protec-  
means of external blocking signals. The block- tion relay unit.  
ingsareselectedseparatelyforeachrelayunit,by  
3
Block diagram  
Fig. 2. Block diagram for undervoltage relay module SPCU 3C15.  
U , U , U  
31  
BS1, BS2, BS3  
Measured phase-to-phase voltages  
External blocking signals for the operation of stage U<  
Blocking signal for the operation of stage U<  
Blocking signal for the operation of stage 3U<<  
Front panel selector switchgroup  
Selector switchgroup for blocking configuration (on the PC board)  
Start signal of stage U<  
Trip signal of stage U<  
Start signal of stage 3U<<  
Trip signal of stage 3U<<  
Yellow indicator  
12  
23  
BTS1  
BTS2  
SG1  
SGB  
SS1  
TS1  
SS2  
TS2  
Y
R
Red indicator  
Note!  
ule.Thesignalswiredtotheterminalsareshown  
in the signal diagram illustrating the concerned  
protection relay unit, see user's manual.  
All input and output signals of the relay module  
are not necessarily wired to the terminals of  
every protection relay unit including this mod-  
4
Front panel  
U<  
3U<<  
Simplified module symbol  
U
U
U
IRF  
12 23 31  
Self-supervision alarm  
indicator  
Indicators for measured voltages  
Numerical display  
STEP  
0.8  
U<  
Setting knob and indicator for  
starting value of stage U<  
STEP  
SG1  
U
n
1.2  
0.4  
Display step push-button  
0.5  
Setting knob and indicator for  
the operate time t< or the time  
multiplier k< of stage U<  
t
[ ]  
< s  
k<  
1
2
3
4
5
6
7
8
0.1  
1.0  
Selector switch-  
group SG1  
0.6  
3U <<  
Setting knob and indicator for the  
start value of stage 3U<<  
U
n
Switchgroup indicator  
Reset push-button  
0
1
0.1  
1.2  
1.0  
RESET  
0.5  
Setting knob and indicator for the  
operate time t<< of stage 3U<<  
[ ]  
t << s  
0.1  
U<  
U<<  
Start/operation indicators  
Type designation of  
the relay module  
SPCU 3C15  
Fig. 3. Front panel of undervoltage relay module SPCU 3C15.  
Each stage has its own yellow/red operation The self-supervision alarm indicator IRF indi-  
indicator. Yellow light indicates starting of the cates that the self-supervision system has de-  
operation stage and red light indicates that the tected a permanent fault. The indicator is lit  
Start and  
operation  
indicators  
stage has delivered a tripping signal.  
with red light shortly after a permanent internal  
fault has been detected. At the same time the  
The red indicator remains lit when the opera- relay module delivers a control signal to the self-  
tion stage resets, thus indicating which protec- supervision output relay of the protection relay.  
tion stage operated. The operation indicator is Further, in most fault cases, a fault code indicat-  
reset by pressing the RESET push-button. The ing the type of fault appears on the display of the  
function of the relay module is not affected by relay module. The fault code is to be recorded to  
an unreset operation indicator.  
serve the subsequent fault location and repair  
actions.  
5
The setting values are shown by the three lit, the setting value currently being shown on  
rightmost green digits of the display. The LED the display.  
Settings  
indicator below the setting knob shows, when  
U</U  
t< [s]  
Start value of stage U< as a multiple of the rated voltage of the relay energizing input.  
n
Setting range 0.4…1.2 x U .  
n
Operate time of stage U<, expressed in seconds, at definite time operation charac-  
teristic. The required setting range, 0.10…1.00 s or 1.00…10.0 s, is selected with  
switch SG1/4. At IDMT mode of operation the setting range 0.1…1.0 of the  
multiplier k> is 0.05…1.00.  
3U<</U Start value of stage 3U<< as a multiple of the rated voltage of the energizing input.  
n
Setting range 0.1…1.2 x U .  
n
t<< [s]  
Operate time of stage 3U<< expressed in seconds. The setting range is selected with  
switch SG1/7, alternatives 0.10…1.00 s and 1.00…10.0 s.  
Further, the checksum of the selector switch- switches have been set and that they work prop-  
group SG1 is indicated on the display when the erly. An example of calculating the checksum is  
indicator under the switchgroup is lit. In this given in the description "General characteristics  
way a check can be made to prove that the of C-type relay modules".  
Additional relay functions required in various front panel of the relay module. The numbering  
applicationsareselectedbymeansoftheselector of the switches, 1…8, and the switch positions,  
switches of switchgroup SG1 located on the 0 and 1, are marked on the front panel.  
Selector switches  
Switch Function  
SG1/1 Selection of start time for the undervoltage stage U<.  
SG1/2  
SG1/1 SG1/2  
Start time  
0
1
0
1
0
0
1
1
0.1 s  
1 s  
5 s  
30 s  
SG1/3 Selection of definite time or IDMT mode of operation for the undervoltage stage U<  
SG1/4 and the setting range of the operate time at definite time mode of operation.  
SG1/3 SG1/4 Mode of operation Operate time t<  
0
0
1
1
0
1
0
1
Definite time  
Definite time  
Inverse time  
Inverse time  
0.1…1.0 s  
1…10 s  
-
-
6
Switch Function  
SG1/5 Selection of automatic blocking of starting and tripping of the undervoltage stage U<.  
When SG1/5 = 0, the undervoltage stage U< always operates when at least one of the  
measured voltages falls below the set start value.  
When SG1/5 = 1, the starting and tripping of the undervoltage stage U< is blocked if  
at least one of the three measured voltages falls to a value below 0.2 x U . This feature  
n
can be used for preventing unnecessary startings and tripping during auto-reclose  
sequences.  
SG1/6 Selection of start time for undervoltage stage 3U<<.  
When SG1/6 = 0, the start time is 0.1 s.  
When SG1/6 = 1, the start time is 1 s.  
SG1/7 Selection of setting range for the operate time t<< of the undervoltage stage 3U<<.  
When SG1/7 = 0, the setting range of the operate time is 0.1…1.0 s.  
When SG1/7 = 1, the setting range of the operate time is 1…10 s.  
SG1/8 Operation of undervoltage stage U< blocked by start signal from stage 3U<<.  
When SG1/8 = 0, the stage U< always operates, irrespective of the operation of stage  
3U<<.  
When SG1/8 = 1, the operation of stage U< is blocked on starting of stage 3U<<.  
The PC board of the relay module contains a stage 3U<< in various protection relay units.  
switchgroup SGB with eight switches. The Switches 4 and 6 are used for configuring block-  
switches 1…3 are used for configuring the start ing signals to stage U<. Instructions for setting  
signals going from the module, whereas the the switchgroup SGB are given in the user's  
switches 5, 7 and 8 are used for configuring the manual of the protection relay unit and in the  
blocking signals applied on the undervoltage signal diagram of the relay.  
Measured values are presented with the right- bepresentedareindicatedbyLEDindicatorson  
most three green digits on the display. Data to the front panel.  
Measured data  
Indicator Measured data  
U
U
U
The U voltage measured by the module as a multiple of the rated voltage of the  
relay energizing input.  
12  
23  
31  
12  
The U voltage measured by the module as a multiple of the rated voltage of the  
23  
relay energizing input.  
The U voltage measured by the module as a multiple of the rated voltage of the  
31  
relay energizing input.  
7
The leftmost red digit on the display indicates  
the register address and the three rightmost  
digits the recorded information.  
Recorded  
information  
Register/ Recorded information  
STEP  
1
Minimum voltage measured by the module as a multiple of the rated voltage of the  
relay energizing input, the last time when one of the three measured voltages passed  
below the set start value of stage U<. Operation of the undervoltage stage stops the  
data recording sequence. Starting of the undervoltage stage erases a previously  
recorded value and starts a new recording sequence.  
2
3
Maximum voltage measured by the module after the previous resetting of the  
registers, as a multiple of the rated voltage of the relay energizing input.  
Lowest level of the highest voltage of the three voltages measured by the module the  
lasttimewhenstage3U<<wasactivated,asamultipleoftheratedvoltageoftherelay  
energizing input. A new start of the stage erases the previous value and starts a new  
data recording sequence. Operation of the stage stops the recording sequence.  
4
Minimum voltage measured by the module after the previous resetting of the  
registers, as a multiple of the rated voltage of the relay.  
5
6
7
Number of starts of the undervoltage stage U<, n (U<) = 0…255.  
Number of starts of the undervoltage stage 3U<<, n (U<<) = 0…255.  
Duration of the latest start event of the undervoltage stage U<, expressed as a  
percentage of the set operate time t<, or, at IDMT mode of operation of the  
calculated operate time. A new start resets the counter, which starts counting from  
zero again. If the stage has tripped, the counter reading is 100.  
8
0
Duration of the latest start situation of the undervoltage stage 3U<<, expressed as  
a percentage of the set operate time t<<. A new start resets the counter, which starts  
recounting from zero. If the stage has tripped, the counter reading is 100.  
Display of blocking signals and other external control signals. The rightmost green  
digit indicates the state of the blockings of the undervoltage stages. The following  
states are indicated:  
0 = no blockings  
1 = operation of the undervoltage stage U< blocked  
2 = operation of the undervoltage stage 3U<< blocked  
3 = operation of both stages blocked  
The middle digit of the register is always a zero. The leftmost green digit indicates  
the state of the remote reset input, if any. The following states are indicated:  
0 = remote reset control input not energized  
1 = remote reset control input energized  
From this register it is possible to move on to the TEST mode, where the starting  
and tripping signals of the module can be activated one by one. For further details  
see description "General characteristics of C-type relay modules".  
8
Register/ Recorded information  
STEP  
A
The address code of the measuring relay module, required by the serial communi-  
cation system.  
Submenu 1: Selection of the data transfer rate.  
Submenu 2: Bus traffic monitor. If the relay module is connected to a data  
communication system and the communication is operating, the counter reading  
ofthe bus traffic monitorwillbe 0. Otherwisethe numbers0...255arecontinuously  
rolling in the counter.  
Submenu3:Passwordrequiredforremotesetting.Thepasswordgiveninthesetting  
mode of a submenu must always be entered via the serial communication before the  
settings can be altered remotely.  
If the module is connected to a control data communicator, for instance type SRIO  
1000M and the data communication is operating, the counter of the monitor is  
zero. If the communication is interrupted the digits 0…255 are continuously  
scrolling in the counter.  
When the display is dark, the register can be re- the password are not erased by interruptions in  
entered by pressing the STEP push-button.  
theauxiliarysupply. Theinstructionsforsetting  
theaddressandthedatatransferratearegivenin  
The registers 1…8 are cleared by pressing the the manual "General characteristics of C-type  
pushbuttonsSTEPandRESETsimultaneously relay modules".  
or via the SPA bus using the command V102.  
The registers are also cleared if the auxiliary At the initial state when none of the stages has  
power supply to the module is interrupted. The started, the reading of register 1 is "000" and  
address code of the relay module, the data trans- that of register 3 is "- - -".  
fer rate of the serial communication system and  
9
Menu chart  
MAIN MENU  
SUBMENU  
STEP 0,5 s  
RESET 1 s  
Display switched off. State also reached after 5 min. time-out  
Voltage U measured  
12  
= value to be set in the setting mode  
Voltage U measured  
23  
S
T
E
P
STEP BACKWARD 0,5 s  
STEP FORWARD 1 s  
Voltage U measured  
31  
SUBMENU  
B
A
C
K
W
A
R
D
Remote setting  
percentage p1  
Remote setting  
value U< x p1  
Set starting value U<  
of stage U<  
1
1
1
1
1
2
2
2
2
2
Remote setting  
percentage p2  
Remote setting  
value t< x p2  
Set starting time  
t<(k<) of stage U<  
Remote setting  
percentage p3  
Set starting value  
3U<< of stage 3U<<  
Remote setting  
value 3U<< x p3  
.5  
s
Remote setting  
value t<< x p4  
Remote setting  
percentage p4  
Set operating time  
t<< of stage 3U<<  
M
A
I
N
Remotely set  
checksum  
Checksum of switch-  
group SG1  
Remotely set  
checksum  
M
E
N
U
Min. voltage measured during the last  
starting of U<  
1
Max. voltage measured after resetting  
2
3
4
S
T
E
P
Min. voltage measured during the last  
starting of 3U<<  
F
O
R
W
A
R
D
Min. voltage measured after resetting  
Number of startings of U<- stage  
Number of startings of 3U<<- stage  
5
1
s
6
7
Duration of the latest starting situation of  
stage U<  
Duration of the latest starting situation of  
stage 3U<<  
8
Incoming  
blockings  
SS1  
TS1  
SS2  
TS2 Trip  
test  
0
0
000  
Baud rate  
setting (Bd)  
Bus communication  
monitor 0…255 (s)  
Password for  
remote setting  
Module  
addres code  
1
2
A
3
Fig. 4. Main menus and submenus of the undervoltage relay module SPCU 3C15.  
The procedure for entering a submenu or a described in detail in "General characteristics of  
setting mode and configuring the module is C-type relay modules".  
10  
At IDMT operation characteristic the operate Recording of the operation time does not start  
time of the undervoltage stage U< is shorter the until the voltage falls to a value of 6% below the  
lower the voltage in comparison with the set set start value. The operate time accuracy stated  
Inverse time  
characteristics  
start voltage.  
in the technical data applies when the voltage  
falls to a level of 10% below the set start value.  
The operation of the U< stage is based on an The undervoltage stage includes one operation  
IDMT operation characteristic, when the selec- characteristic with one degree of inversity.  
tor switch SG1/3 on the front panel is in the  
position 1. The relationship between time and  
voltageatanIDMToperationcharacteristiccan  
be expressed as:  
k< x a  
U< - U  
U<  
t =  
+ d [s]  
p
(
)
where  
= operate time /s  
t
k< = time multiplier  
U = voltage value /V  
U< = set start voltage /V  
a
= constant 480  
= constant 32  
= constant 0.055  
= constant 2  
b
d
p
t/s  
1000  
100  
10  
1
k<  
1,0  
0,7  
0,4  
0,2  
0,1  
0,1  
0,01  
U/U<  
0,5  
0,7  
0,6  
0,8  
0,9  
1,0  
Fig. 5. Inverse time operation characteristic of the undervoltage stage U<.  
11  
Technical data  
Undervoltage stage U<  
Start voltage U<  
Start time  
0.4…1.2 x U  
n
0.1 s, 1 s, 5 s or 30 s  
Operate time at definite time operation  
characteristic  
1.1…1.00 s or 1…10 s  
Time multiplier k< at IDMT operation  
characteristic  
Reset time  
0.1…1.00  
≤80 ms  
≥1.03  
Drop-off/pick-up ratio  
Operate time accuracy at definite time operation  
characteristic and start time accuracy  
Operate time accuracy at IDMT operation  
characteristic  
±2% of set value or ±25 ms  
±25 ms or the inaccuracy appearing  
when the measured voltage varies ±3%  
±3% of set value  
Operate accuracy  
Undervoltage stage 3U<<  
Start voltage 3U<<  
Start time  
0.1…1.2 x U  
0.1 s or 1.0 s  
n
Operate time at definite time operation  
characteristic  
Reset time  
0.1…1.0 s or 1…10 s  
≤80 ms  
Drop-off/pick-up ratio  
- when the start value of the 3U<< stage >0.4  
- when the start value of the 3U<< stage <0.4  
Operate time accuracy and start time accuracy  
Operate accuracy  
≤1.03  
approx. 1.1  
±2% of set value or ±25 ms  
±3% of set value  
12  
The substation level control data communica- represented by the numbers 1, 2, 4...128. The  
tor is able to read, over the SPA serial bus, the event mask is formed by multiplying the above  
event data of the module, e.g. starting and numbers either by 0 (event not included in  
tripping, from the undervoltage relay module reporting) or 1 (event included in reporting)  
SPCU 3C15. Event information called for are and adding up the numbers received (compare  
printed out in the format: time (ss.sss) and event calculation of checksum).  
Serial  
communication  
parameters  
Event codes  
code.TheeventcodesofthemoduleareE1...E8,  
E50 and E51. Furthermore, the substation level The event mask may have a value in the range  
control data communicator forms event codes 0...255. The default value of the undervoltage  
relating to the data communication.  
relay module SPCU 3C15 is 85, which means  
that all startings and trippings are included in  
ThecodesE1...E8andtheeventsrepresentedby the reporting, but not the resetting. The codes  
these can be included in or excluded from the E50...E54 and the events represented by these  
event reporting by writing, over the SPA bus, a cannot be excluded from the reporting.  
so called event mask (V155) to the module. The  
event mask is a binary number coded to a EventcodesforundervoltagerelaymoduleSPCU  
decimal number. The event codes E1...E8 are 3C15:  
Code Event  
Weighting Default  
coefficient setting  
E1  
E2  
E3  
E4  
E5  
E6  
E7  
E8  
Starting of undervoltage stage U<  
1
2
4
1
0
1
0
1
0
1
0
Starting of undervoltage stage U< reset  
Tripping of undervoltage stage U<  
Tripping of undervoltage stage U< reset  
Starting of stage 3U<<  
Starting of stage 3U<< reset  
Tripping of stage 3U<<  
8
16  
32  
64  
128  
Tripping of stage 3U<< reset  
Default value of event mask V155  
85  
E50  
E51  
E52  
E53  
Restart of microprocessor  
Overflow of event register  
Temporary interruption in data communication  
No response from the relay module over the data  
communication bus  
The module responds again over the data  
communication bus  
*
*
*
-
-
-
*
*
-
-
E54  
0 not included in the event reporting  
1 included in the event reporting  
* no code number, always included in event reporting  
-
cannot be set  
NOTE!  
In the SPACOM system the event codes E52...  
E54 are generated by the station level control  
data communicator, e.g. type SRIO 1000M.  
13  
Data to be  
transferred over  
the serial bus  
In addition to the event code data transfer, the over the serial communication bus. Further,  
input data (I data), output data (O data), setting part of the data can be changed over the SPA bus  
values (S), memorized data (V data) and some by separate commands. All data information is  
other data can be read from the relay module available in channel 0.  
Data  
Code  
Data  
direct.  
Values  
Measured voltage U  
Measured voltage U  
Measured voltage U  
I1  
I2  
I3  
I4  
R
R
R
R
0…9.99 x U  
0…9.99 x U  
0…9.99 x U  
0 = no blocking  
1 = tripping of stage U<  
blocked  
12  
23  
31  
n
n
n
Blocking of undervoltage stage U<  
Blocking of undervoltage stage 3U<<  
I5  
R
0 = no blocking  
1 = tripping of stage 3U<<  
blocked  
Starting of undervoltage stage U<  
Tripping of undervoltage stage U<  
Starting of undervoltage stage 3U<<  
Tripping of undervoltage stage 3U<<  
O1  
O2  
O3  
O4  
R
R
R
R
0 = U< stage not started  
1 = U< stage started  
0 = U< stage not tripped  
1 = U< stage tripped  
0 = 3U<< stage not started  
1 = 3U<< stage started  
0 = 3U<< stage not tripped  
1 = 3U<< stage tripped  
Activated start value of stage U<  
Activated operate time t< of stage U<  
or time multiplier k<  
Activated start value of stage 3U<<  
Activated operate time t<< of stage 3U<<  
Activated checksum of switchgroup SG1  
S1  
S2  
R
R
0.4…1.2 x U  
0.1…10 s or  
0.1…1.0  
0.1…1.2 x U  
0.1…10 s  
n
S3  
S4  
S5  
R
R
R
n
0…255  
Start value of stage 3U<,  
set with the setting knob  
S11  
S12  
S13  
S14  
S15  
R
R
R
R
R
0.4…1.2 x U  
n
n
Operate time or time multiplier of stage  
3U< , set with the setting knob  
Start value of stage 3U<<,  
set with the setting knob  
Operate time of stage 3U<<,  
set with the setting knob  
0.1…10 s or  
0.1…1.0  
0.1…1.2 x U  
0.1…10 s  
0…255  
Checksum of switchgroup SG1,  
(set with the switches)  
Remote setting percentage of the  
start value for stage U<  
Remote setting percentage for the operate  
time or time multiplier of stage U<  
Remote setting percentage for the start  
value of stage 3U<<  
Remote setting percentage for the operate  
time of stage 3U<<  
Remotely set checksum of  
S21  
S22  
S23  
S24  
S25  
R, W  
R, W  
R, W  
R, W  
R, W  
0…999%  
0…999%  
0…999%  
0…999%  
0…255  
switchgroup SG1  
14  
Data  
Code  
Data  
direct.  
Values  
Remote setting of the start value  
of stage U<  
Remote setting of the operate time  
or time multiplyer of stage U<  
Remote setting of the start value  
of stage 3U<<  
Remote setting of the operate time  
of stage 3U<<  
Remotely set checksum of  
switchgroup SG1  
S31  
S32  
S33  
S34  
S35  
R
R
R
R
R
0.4…1.2 x U  
n
n
0.1…10 s or  
0.1…1.0  
0.1…1.2 x U  
0.1…10 s  
0…255  
Minimum voltage measured after  
starting of stage U<  
Maximum voltage measured after resetting V2  
Minimum voltage measured after  
starting of stage 3U<<  
V1  
R
0…9.99 x U  
n
R
R
0…9.99 x U  
0…9.99 x U  
n
n
V3  
Minimum voltage measured after resetting V4  
R
R
R
R
0…9.99 x U  
0…255  
0…255  
n
Number of starts of stage U<  
Number of starts of stage 3U<<  
Duration of the latest start event  
of stage U<  
V5  
V6  
V7  
0…100%  
Duration of the latest start event  
of stage 3U<<  
V8  
R
0…100%  
Resetting of recorded data  
Remote control of settings  
V102  
V150  
W
1 = registers V1…V8 are reset  
R, W  
0 = potentiometer settings  
S11…S15 activated  
1 = remote settings  
S31…S35 activated  
Event mask word  
V155  
R, W  
0…255, see section  
"Event codes"  
Opening of password for remote  
settings  
Changing or closing of password  
for remote settings  
V160  
V161  
W
W
1…999  
0…999  
Activation of self-supervision function  
V165  
W
1 = self-supervision output  
is activated and IRF in-  
dicator turns on in about  
5 seconds, after which the  
self-supervision system  
andtheIRFindicatorreset  
Data communication address  
of the relay module  
V200  
V205  
W
R
1…254  
Program version  
018 _  
15  
Data  
Code  
Data  
direct.  
Values  
Type designation of the relay module  
Reading of event register  
F
L
R
R
SPCU 3C15  
Time, channel number  
and event code  
Re-reading of event register  
B
R
R
Time, channel number  
and event code  
Reading of module status data  
C
0 = normal state  
1 = module been subject  
to automatic reset  
2 = overflow of event register  
3 = events 1 and 2 together  
Resetting of module status data  
Time reading or setting  
C
T
W
0 = resetting  
R, W  
00.000…59.999 s  
R = data to be read from the relay module  
W = data to be written to the relay module  
The data transfer codes L, B, C and T have been The settings S21...S25 allow reading or writing.  
reserved for the event data transfer between the Acondition for writing is that password V160,  
relay module and the control data communica- for remote setting has been opened. The vari-  
tor.  
ables S31...S35 contain the remote setting val-  
ues.  
The event register can be read by the L com-  
mand only once. Should a fault occur, for exam- WhenthevaluesofthevariablesS21...S24areto  
ple, in the data transfer, it is possible, by using bechanged,the variablescanbegivenapercent-  
the B command, to re-read the contents of the age factor within the range 0...999. It is possible  
event register once already read by means of the to alter a setting value beyond the setting ranges  
L command. When required, the B command specified in the technical data of the relay mod-  
can be repeated.  
ule. However, the validity of the setting values  
are guaranteed only within the setting ranges  
The setting values S1...S5 are the alerted set specified in the technical data.  
values currently used by the protection relay  
module. These values are set either by remote Activation of the self-supervision funktion  
control or by means of the setting knobs. The (V165) prevents the relay module from operat-  
values S11...S15 are set with the setting knobs ing as long as the self-supervision output is  
and the selector switches. Variables S21...S25 activated and the IRF indicator is lit.  
are set as percentage values via remote control.  
16  
Once the self-supervision system has detected a code cannot be reset. The fault code consists of  
permanentrelayfault, theIRFLEDonthefront a red digit one (1) and a green code number that  
panel of the module is lit, and at the same time indicatesthefaulttype.Thefaultcodeshouldbe  
the normally operated signal relay of the self- recorded and stated when service is ordered.  
supervision system drops off.  
Fault codes  
The fault codes of the undervoltage relay mod-  
In most fault situations an auto-diagnostic fault ule SPCU 3C15 are explained in the following  
code is shown on the relay display. The fault table:  
Fault code Explanation  
4
30  
50  
Faulty output relay path or missing output relay card  
Faulty program memory (ROM)  
Faulty working memory (RAM)  
195  
131  
67  
203  
139  
75  
Too low a value in reference channel with multiplier 1  
Too low a value in reference channel with multiplier 5  
Too low a value in reference channel with multiplier 25  
Too high a value in reference channel with multiplier 1  
Too high a value in reference channel with multiplier 5  
Too high a value in reference channel with multiplier 25  
No interruptions from the A/D-converter  
253  
17  
General characteristics of  
C-type relay modules  
User´s manual and Technical description  
B
I
I
>
>>  
I
I
L2 I  
IRF  
L1  
L3  
Self-supervision alarm indicator  
(Internal Relay Fault)  
Indicators for measured values  
Display, 1 + 3 digits  
STEP  
1.5  
0.5  
13  
I
I
>
Setting knob 1  
with indicator  
STEP  
SG1  
n
0.5  
2.5  
Step push-button (STEP)  
Stage 1  
>
[s]  
t
Setting knob 2  
with indicator  
k
1
2
3
4
5
6
7
8
0.05  
1.0  
20  
Programming switches SG1  
I
I
>>  
Setting knob 3  
with indicator  
n
0
1
2.5  
Switchgroup indicator  
RESET  
Stage 2  
0.5  
Reset push-button (RESET)  
>>[s]  
t
Setting knob 4  
with indicator  
0.04  
1.0  
I
>
I
>>  
Start/operation indicators  
SPCJ 3C3  
1MRS 750328-MUM EN  
General characteristics of  
C-type relay modules  
Issued 96-02-19  
Version A (replaces 34 SPC 2 EN1)  
Checked L-W U  
Approved TK  
Data subject to change without notice  
Push-buttons .................................................................................................................. 2  
Programming switches SG1 ............................................................................................ 2  
Setting knobs .................................................................................................................. 3  
Display ........................................................................................................................... 3  
Display main menu ................................................................................................... 3  
Display submenu ....................................................................................................... 4  
Setting mode ............................................................................................................. 4  
Example: Operation in setting mode ......................................................................... 5  
Stored information .................................................................................................... 6  
Trip-test mode........................................................................................................... 7  
Example: Trip-test function ...................................................................................... 8  
Operation indicators....................................................................................................... 9  
Fault codes...................................................................................................................... 9  
Contents  
The front panel of the relay module contains settings, e.g. for setting the address of the relay  
two push-buttons. The STEP button is used for module and the data transfer rate for the serial  
stepping forward in the display and the RESET communication when the modules are used in  
button for resetting the red indicators. Addi- relay packages provided with this quality. (See  
tionally, the push-buttons are used for certain section Display).  
Push-buttons  
Part of the settings and the selections of the checksum of the switchgroup is shown on the  
operating characteristics for the relay modules display. The checksum can be used for checking  
in various applications are made with the pro- that the switches are properly set. Fig. 2 gives an  
grammingswitchesSG1onthefrontpanel. The example of calculating the checksum.  
indicator of the switchgroup glows when the  
Programming  
switches SG1  
Fig. 2. Example of calculating the checksum of programming switchgroup SG1.  
When the checksum calculated according to the The function of the programming switches of  
example is equal to the checksum indicated on the individual measuring relay modules is speci-  
the display of the relay module, the switches are fiedinthedescriptionofthemoduleconcerned.  
properly set.  
2
Most of the operating values and operating In addition to the settings made with the setting  
times are set by means of the setting knobs on knobs, most modules allow so called remote  
the front panel of the relay module. Each setting setting. This means that the settings made by  
knob has its own (LED) indicator which glows means of the setting knobs of the module and  
when the concerned setting value is shown on the checksum of the programming switchgroup  
Setting knobs  
the display.  
may be altered through an instruction over the  
serial communication bus. Remote setting is  
If a setting knob is turned while the display is possible if the password in the register A is  
showing another measured or set value, the known, and the remote settings are not acti-  
value being set automatically appears on the vated,i.e.parameterV150=0.Thecircumstance  
display. Simultaneously, the indicator for the that the remote settings are activated is shown  
concerned setting starts glowing.  
with a flashing light of the indicator of the  
setting knob, the value of which currently is  
being displayed.  
The measured and set values as well as the data When the auxiliary voltage is connected to a  
recorded are shown on the display of the meas- measuring relay module, the module initially  
uring relay module. The display consists of four tests the display by stepping through the digits  
digits. The three digits (green) to the right 1...9 for about 15 seconds. When the test is  
indicate the measured, set or stored value and finished the display turns dark. The testing can  
the digit at the extreme left (red) the number of be interrupted by pressing the STEP button.  
theregister. Themeasuredorsetvaluedisplayed The protective functions of the module are  
is indicated by a yellow LED indicator. The operative throughout the testing.  
number of the register glows only when a stored  
Display  
value is displayed.  
Display main menu  
All the data required during normal operating From a dark display only forward movement is  
conditions are accessible from the main menu possible. When keeping the STEP button de-  
whichpresentsthemeasuredvaluesinreal-time, pressed, the display is continuously moving in  
the normal setting knob settings as well as the forward direction stopping for a while at the  
most important memorized data.  
dark point.  
The data to be shown in the main menu are Unless the display is switched off by stepping to  
selected to the display in a certain sequence by the dark point, it remains activated for about 5  
means of the STEP button. When pressing the minutes from the last pressing of the STEP  
STEP button for about one second, the display button and then goes out.  
moves forward in the display sequence. When  
pressing it for about 0.5 seconds, the display  
moves backwards in the display sequence.  
3
Display submenu  
Less important values and values not very often display moves forward when pressing the STEP  
set are displayed in the submenus. The number button for one second and backward when  
of submenus varies with different relay module pressing it for 0.5 seconds. The return to the  
types. The submenus are presented in the de- main menu has taken place when the red STEP  
scription of the concerned module.  
display turns dark.  
A submenu is entered from the main menu by When entering a submenu from a measured or  
pressing the RESET button for about one sec- set value indicated by a LED indicator, the  
ond. When the button thereafter is released, the indicator remains glowing and the address win-  
red digit (STEP) of the display starts flashing, dow (STEP) of the display starts flashing. A  
indicatingthatone is ina submenu. Goingfrom flashing address window when no LED indica-  
one submenu to another or back to the main tor is lit indicates that the submenu of a register  
menu follows the same principle as when mov- has been entered.  
ing from the main menu display to another; the  
Fig. 3. Example of the main and submenus for the settings of the overcurrent relay module SPCJ  
3C3. The settings made with the setting knobs are in the main menu and they are displayed by  
pressing the STEP button. In addition to the setting knob settings the main menu contains the  
measured current values as well as the registers 1…5, as well as 0 and A. The remote setting  
percentage and remote setting value are located in the submenus for the settings and are activated  
on the display by pressing the RESET button.  
Setting mode  
Theregistersofthemainmenuandthesubmenus pressed slightly in excess of the STEP button.  
also contain parameters to be set. The settings Returnfromthesettingmodetothemainmenu  
are made in the so called setting mode, which is or submenu is possible by pressing (for about 10  
accessible from the main menu or a submenu by s) the RESET button until the green digits on  
pressing the RESET button, until the digit at the display stop flashing. If the module is left in  
the extreme right starts flashing (about 10 s). the setting mode, it will return automatically to  
The flashing digit is set by means of the STEP the start condition after about 5 minutes.  
button. The flashing is moved on from digit to  
digit by pressing the RESET button.  
The values to be set in the setting mode are for  
instance the address code of the relay module  
A set value is stored in the memory by pressing and the data transfer rate for the serial commu-  
the push-buttons STEP and RESET simultane- nication. Further the percentage values for the  
ously. In practice the RESET button must be remote settings can be changed.  
4
Example 1:  
Function in the setting mode. Manual setting of g)  
the address code of a relay module and the data Set the digit by means of the STEP button.  
transfer rate for the serial communication. The  
initial value for the address code is 146.  
a)  
Presspush-buttonSTEPuntilregisteraddressA  
appears on the display.  
h)  
Store the set address number in the memory of  
the relay module by pressing the RESET and  
STEP button simultaneously. At the moment  
the information enters the memory, the three  
green dashes flash in the display, i.e. A—.  
b)  
Press the RESET button for about 10 s until the  
right most digit starts flashing.  
i)  
Leave the setting mode by pressing the RESET  
button for about 10 s, until the display stops  
flashing.  
c)  
PresstheSTEPbuttonrepeatedlytosetthedigit  
to the value desired.  
j)  
Then enter submenu 1 of register A by pressing  
the RESET button for approx. one second. The  
register address A is then replaced by a flashing  
d)  
Press the RESET button to make the middle of 1. This submenu is used for setting the data  
the green digits flash. transfer rate of the serial communication.  
e)  
k)  
Set the middle address digit by means of the The data transfer rate for the serial communica-  
STEP button.  
tion is set and stored in the same way as the  
address, see sections b...i, except that the con-  
tinuously glowing register address has been re-  
placed by a flashing 1.  
l)  
After storing the data transfer rate for the serial  
communication you may return to the main  
f)  
Press the RESET button to make the left most menu of register A by pressing the STEP button  
green digit flash. for about 0.5 second.  
5
Stored information  
The parameter values measured at the moment Register A contains the address code of the relay  
when a fault occurs are recorded in the registers, moduleasrequiredbytheserialcommunication  
in some modules also the setting values. The system. Example 1 on page 4 shows how the  
recorded data, except for some setting param- address code is altered. Submenu 1 of register A  
eters, are set to zero by pressing the push- contains the data transfer rate value expressed in  
buttons STEP and RESET simul-taneously. kilobaud for the serial communication.  
The data in normal registers are erased if the  
auxiliary voltage supply to the relay is disrupted, Submenu 2 of register A contains a bus traffic  
only the set values and the number of monitorfortheSPACOMsystem. Iftheprotec-  
autoreclosings are maintained in the registers at tive relay, which contains the relay module, is  
a voltage failure.  
linked to a system including the control data  
communicator and the data communication  
Thenumberoftheregistersvarieswithdifferent system is operating, the counter reading of the  
module types. The function of the registers are monitorwillbezero.Otherwisethedigits1...255  
illustrated in the descriptions of the separate are continuously rolling in the monitor.  
relay modules. Additionally, the system panel  
contains a simplified list of the data recorded by Submenu 3 contains the password required for  
the various relay modules of the relay assembly. changing the remote settings. The address code,  
the data transfer rate for the serial communica-  
All C-type relay modules are provided with two tion and the password can be set manually or via  
general registers: register 0 and register A.  
the serial communication bus. For manual set-  
ting see example 1.  
Register0contains, incodedform, theinforma-  
tion about e.g. external blocking signals and The start value for the address code and the  
status information for the circuit breaker. The password is 001 and that for the data transfer  
codes are explained in the descriptions of the rate 9.6 kilobaud.  
relay modules.  
6
Trip-test mode  
Register 0 also allows access to the so called The selected starting or tripping is activated by  
Trip-test function, which allows the output simultaneouspressingofthepush-buttonsSTEP  
signalsoftherelaymoduletobeactivatedoneby and RESET. The signal remains activated as  
one. If the auxiliary relay module of the protec- long as the two push-buttons are being pressed.  
tion assembly is in place, the auxiliary relays will  
be included in the testing.  
Theself-supervisionoutputisactivatedbypress-  
ingtheSTEPbuttononcewhennosettingknob  
When pressing the RESET button for about 10 indicator is flashing. The IRF output is acti-  
seconds, the three green digits to the right start vated in about 5 seconds after pressing of the  
flashing to indicate that the relay module is in STEP button, and resets after that. Simultane-  
testposition. Theindicatorsofthesettingknobs ously, the display returns to the main menu and  
indicate by flashing which output signal can be performs the initial testing indicated by rolling  
activated. The required output function is se- digits 0...9 in the display several times.  
lected by pressing the RESET button for about  
1 second, until the following LED indicator Thesignalsareselectedintheorderillustratedin  
starts flashing.  
fig. 4.  
The indicators of the setting knobs refer to the  
following output signals:  
Setting knob 1 SS1  
Setting knob 2 TS1  
Setting knob 3 SS2  
Setting knob 4 TS2  
No indication IRF  
Starting of stage 1  
Tripping of stage 1  
Starting of stage 2  
Tripping of stage 2  
Self-supervision  
IRF  
SS1  
TS1  
SS2  
TS2  
REGISTER 0  
RESET  
10 s  
RESET  
1 s  
RESET  
1 s  
RESET  
1 s  
RESET  
1 s  
RESET  
1 s  
STEP  
STEP+  
RESET  
STEP+  
RESET  
STEP+  
RESET  
STEP+  
RESET  
Fig. 4. Sequence order for selecting the output signals in the Trip-test mode.  
Ife.g. theindicatorofthesettingknob2(second Trip-test sequence scheme, by pressing the  
from the top) is flashing, and the push-buttons RESET button for about 10 seconds. If the  
STEP and RESET are being pressed, the signal module is left in the Trip-test mode, it will  
TS1 (tripping of stage 1) is activated. Return to return automatically after approx. 5 minutes.  
the main menu is possible at any stage of the  
7
Example 2:  
Trip-test function. Forced activation of the out- d)  
puts is made as follows:  
Press the RESET button for about 1 second  
until the indicator of the second setting knob  
starts flashing.  
a)  
Step forward on the display to register 0.  
e)  
Press the push-buttons RESET and STEP si-  
multaneously to activate tripping of stage 1 (e.g.  
the I>-stage of the overcurrent module SPCJ  
b)  
Press the RESET button for about 10 seconds 3C3). The indicator of the concerned stage  
until the three green digits to the right and the starts glowing red.  
LED indicator of the uppermost setting knob  
start flashing.  
f)  
Starting and tripping of the second stage is  
c)  
activated in the same way as stage 1. The indica-  
Press the push-buttons RESET and STEP si- torofthethirdorfourthsettingstartsflashingto  
multaneously. Then the starting of stage 1 (e.g. indicate that the concerned stage has been acti-  
the I>-stage of the overcurrent module SPCJ vated.  
3C3) is activated and, simultaneously, the indi-  
cator of the stage starts glowing yellow.  
g)  
To activate the self-supervision output step to-  
wards the test position, where no indicator is  
flashing. Press the STEP button once. In about  
5 seconds the red IRF indicator starts glowing  
and the IRF output is activated. Shortly thereaf-  
ter the indicator goes out and the output auto-  
matically resets. At the same time the module  
leaves the test position.  
h)  
It is possible to leave the trip test mode at any  
step of the sequence scheme by pressing the  
RESET button for about 10 seconds until the  
three digits to the right stop flashing.  
8
A measuring relay module is provided with two The operation indicator starts glowing yellow  
separate operating stages, each of which with its when the operating stage starts and red when a  
ownyellow/redoperationindicatoronthelower delayed tripping operates. The functions of the  
Operation  
indicators  
part of the front plate of the relay module.  
start and operation indicators are described in  
detail in the different protection relay module  
manuals.  
In addition to the protective functions the relay In most fault situations a fault code, indicating  
module is provided with a self-supervision sys- the nature of the fault, appears on the display of  
tem which continuously supervises the function the module. The fault code, which consists of a  
of the microprocessor, its program execution reddigit(1)andathreedigitgreencodenumber,  
Fault codes  
and the electronics.  
cannot be removed from the display by reset-  
ting. When a fault occurs, the fault code should  
When the self-supervision system has detected a be recorded and stated when service is ordered.  
permanent fault in the relay module, the red  
IRF indicator on the panel starts glowing soon  
after the fault was discovered. At the same time  
the module puts forward a signal to the self-  
supervision contact of the relay assembly.  
9
ABB Oy  
Substation Automation  
P.O.Box 699  
FIN-65101 VAASA  
Finland  
Tel. +358 (0)10 22 11  
Fax.+358 (0)10 22 41094  
www.abb.com/substationautomation  

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