GE Video Game Controller Entelli Switch 250 User Manual
GE Zenith Controls  
e
Entelli-Switch 250  
Microprocessor Controller  
Transfer Switch Control Panel  
71R-2000  
5/03  
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Operation and Maintenance Manual  
Safety / Installation  
DANGER  
HAZARDOUS VOLTAGE  
(Can Cause Severe Injury or Death)  
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.  
The safe operation of your switch is GE Zenith’s focus.  
Final Equipment Inspection  
The proper storage, installation, operation and mainte-  
Prior to energizing the transfer switch:  
1. Remove any debris incurred, with a vacuum, due  
to shipment or installation.  
nance will help increase the life of the switch.  
CAUTION  
Due to hazardous voltage and current, GE Zenith rec-  
ommends that a GE Zenith Certified technician or a  
qualified electrician must perform the  
2. Verify that all cabled connections are  
correct and that phase rotation of both sources  
match.  
3. Check engine start connections.  
4. Verify the correct connection of all  
control wires.  
installation and maintenance of the switch.  
5. Check settings of all timers and adjust  
as necessary.  
6. Adjust any optional accessories as required.  
7. Check the lug torque values of the power  
connections.  
Equipment Inspection  
and Storage  
Once you have received the transfer switch, inspect  
it for any damage. This includes damage to the  
enclosure, power panel, control panel and wiring  
harness. If any damage is found or suspected, file a claim  
as soon as possible with the carrier and notify the nearest  
GE Zenith representative.  
NOTE:  
Lug torque values are specified  
in the power panel manual.  
8. Make sure that all covers and barriers are  
installed and properly fastened.  
NOTE:  
Power panels ship from GE Zenith  
in Source 1 Position.  
Before installation, if it is necessary, store the transfer  
switch in a clean dry place, protected from dirt and  
water. Provide ample air circulation and heat, if neces-  
sary, to prevent condensation.  
WARNING  
Do not use a blower since debris may  
become lodged in the electrical and  
mechanical components and cause damage.  
Operating  
Storage  
Temperature  
Temperature (Ambient):  
Humidity  
-30°C to  
5% to 95%  
(non-con-  
densing)  
40-400 AMP  
(molded shell)  
+75°C  
Each GE Zenith transfer switch is factory wired and  
tested. A complete information package is furnished  
with each switch which includes:  
a. Sequence of operation.  
(-22°F to  
+167°F)  
-20°C to +65°C  
(-4°F to +149°F)  
b. Description and operation of  
all accessories supplied.  
c. Power panel connection diagram  
and schematic.  
d. Description and identification of  
all customer field connections.  
40-4000 AMP  
(all other frame  
and panel types)  
-20°C to +60°C  
(-4°F to +140°F)  
Installation of GE Zenith transfer switches includes:  
a. Mounting the transfer switch cabinet.  
b. Connection of Source 1, Source 2,  
and Load cables or bus bars.  
Table 1  
c. Connection of external control  
circuits as required.  
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GE Zenith Controls  
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Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Installation  
(cont’d)  
DANGER  
HAZARDOUS VOLTAGE  
(Can Cause Severe Injury or Death)  
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.  
Initial Energization  
4
5
6
1
Before proceeding, refer to the information package  
supplied with the ATS and read and understand the  
information on all accessories provided.  
P Relay  
(Engine Start)  
2
E
Contact rating is  
10 Ampere at 120VAC  
or 28VDC Gold plated  
1. Unlock the enclosure.  
2. Open the enclosure.  
3. Verify the correct system voltage.  
3
Figure 1  
NOTE:The equipment rating nameplate on  
the transfer switch lists the voltage.  
See Figure 3.  
Engine Start  
Control Connections  
4. Close Source 1 circuit. breaker.  
The engine-start terminals are clearly identified by a  
label on the microcontroller backplate. In the case of  
manual transfer switches, or in other applications not  
requiring the microprocessor, clearly marked terminal  
blocks are provided in the upper left corner of the con-  
trol panel for the engine start control wires.  
NOTE:The controller will illuminate Source 1  
Available LED if proper voltage  
is sensed.  
5. Verify the phase to phase voltages at Source 1  
line terminals.  
6. Close Source 2 circuit breaker.  
7. Start the generator’s engine.  
Figure 2 shows location of engine start connections  
for Bypass Isolation Transfer Switch. Figure 5 (pg.6)  
shows location of engine start connections for  
Automatic Transfer Switch.  
NOTE:  
The controller will illuminate Source 2  
Available LED when preset voltage  
and frequency levels are reached.  
Terminals for field connections to the A3 Source 2  
auxiliary contacts and the A4 Source 1 auxiliary contacts  
are also provided. These terminals are clearly marked  
and appear on the side of the power panel. On 400  
amp metal frame units these terminals appear on  
the bracket above the operator handle.  
8. Verify the phase to phase voltages at Source 1  
line terminals.  
9. Verify that the phase rotation of Source 1  
is the same as the phase rotation of  
Source 2.  
10. Shut down the generator’s engine.  
11. Place the starting control in the Automatic position.  
12. Complete the visual inspection of the transfer switch.  
13. Close the enclosure.  
14. Lock the enclosure.  
g
GE Zenith Controls  
SERIAL NUMBER:  
RATING:  
VOLTS -  
AMPS -  
HZ -  
PHASE -  
SYSTEM VOLTS:  
MODEL NUMBER:  
Figure 3  
CAUTIONS  
Certain accessories, per specific  
schematics, can inhibit automatic transfer.  
Engine Gen-Set could start when  
engine control wires are attached.  
Figure 2 (Typical)  
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GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Installation  
(cont’d)  
1. Unlock the enclosure.  
Initial Energization (cont’d)  
After all options and accessories are checked and  
verified, follow these steps to set up the ATS. Refer to  
Entelli-Switch 250 display Figure 4. The annunciation  
LEDs illuminate to indicate (1) source availability,  
(2) ATS position, and (3) Entelli-Switch 250 control  
function (timing).  
2. Open the enclosure.  
3. Place the Disconnect Switch in the Inhibit.  
NOTE:  
This step is only performed if the  
“DS” Option was purchased.  
4. Close the external (up-stream) Source 1  
circuit breaker.  
NOTES: Source 1 Available and Source 1  
Position LED’s will illuminate.  
If Source 1 Available LED does not  
illuminate, verify that Source 1 Voltage  
is above the preset restore value.  
The Gen-Set will start and run while  
Source 2 stop DelayTimer is timing.  
S 1 O K  
21: 56  
M O N 23 A P R 2002  
5. Close the External (up-stream) Source 2 line  
circuit breaker.  
6. Start the engine generator in MANUAL mode.  
M O RE  
T E S T  
NOTE:  
When the voltage and frequency  
reach preset values, the Source 2  
Available LED will illuminate.  
7. Verify the phase to phase voltages at Source 2  
line terminals.  
8. Verify that the phase rotation of  
Source 2 is the same as the phase  
rotation of Source 1.  
9. Shut down the generator's engine.  
(Place in Automatic Mode.)  
NOTE:  
Source 2 Available LED  
will turn off.  
Figure 4 – LCD and keypad  
NOTE:  
The engine generator will continue  
to run for the duration of Source 2  
Stop DelayTimer.  
10. Place the disconnect switch to ENABLE.  
11. Complete the visual inspection of the  
transfer switch.  
12. Close the enclosure.  
13. Lock the enclosure.  
WARNING  
When performing a hi-pot or  
dielectric test on the power section,  
DISCONNECT the control panel plugs from  
the microprocessor to avoid potential damage.  
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GE Zenith Controls  
5
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Installation  
(cont’d)  
DANGER  
HAZARDOUS VOLTAGE  
(Can Cause Severe Injury or Death)  
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.  
Control Connections  
Figure 5  
Clock Program  
Backup Battery  
Remove protective  
strip to enable clock  
functions  
Engine Start  
Connections  
Network Connector  
Input/Output  
Connectors  
to I/O Modules  
To R/T Box  
To Power  
Panel  
A complete information package is furnished with  
each transfer switch including a complete connection  
diagram and schematic which details all necessary  
control circuit field connections.  
The terminals are clearly identified by a label on the  
microcontroller backplate. In the case of manual trans-  
fer switches, or in other applications not requiring the  
microprocessor, clearly marked terminal blocks are  
provided in the upper left corner of the control panel  
for the engine start control wires.  
The engine start control wires connect to the  
engine start relay terminals located to the left  
of the microprocessor. Figure 5 shows the location  
of these terminals.  
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GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Entelli-Switch 250 Controller  
Entelli-Switch 250 Controller  
Consists of two major assemblies:  
Engine Start Relay P  
I. The Microprocessor contains the following:  
I/O Interface  
Entelli-Switch 250  
Board  
A. Entelli-Switch 250 Board - Customer Input  
and Output (I/O) for system interface. Located  
on the left hand side of the back of the unit  
(see figure 6)  
1. I/O accessories that can be found here are:  
a. Engine start relay P output  
b. Pre-Signal to transfer T3, W3 and  
UMD output (optional)  
Battery Strip  
and  
Access  
Code Label  
c. Transfer Inhibit Q3 and Q7 input  
(optional)  
d. Remote test Q2 input (optional)  
e. Network interface ZNET  
input/output (optional)  
B. LCD and Keypad located on the exterior  
of the door (see figure 7)  
1. User accessibility to the following:  
a. LED indication of source  
availability  
b. LED indication of transfer  
switch position  
c. LCD screen indicates:  
(1) timer count down (numeric)  
(2) event reporting (text)  
R/T Box  
d. Keypad provides user interface to:  
[in conjunction with LCD screen]  
(1) Setting sensors and timers  
(2) Configuring logic accessories  
II. The R/T box (relay transformer box) contains  
Figure 6  
the following: (see figure 6)  
A. Relays which are required for controller output  
to energize the transferring mechanism of the  
transfer switch at line voltage.  
B. Transformers which drop line voltage  
to control level for controller input.  
S 1 O K  
21: 56  
M O N 23 A P R 2002  
M O RE  
T E S T  
Figure 7  
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GE Zenith Controls  
7
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Entelli-Switch 250 Controller  
(cont’d)  
LCD & Keypad  
no changes can be made without entry of the access code.  
The factory set six-digit access code is located on a white  
label on the back of the unit (see figure 10 pgs. 17-19).  
These options are accessible through the LCD and  
keypad (see figure below). To become familiar with the  
options loaded into a particular unit, scrolling through  
the SET and CFG menu will show the descriptions of  
the options (see pages 17-18). These menus are the very  
same menus that are used to access the setting and/or  
configuration of these options. The SET (setting) menu  
is primarily used to show or change, time and voltage  
settings. The CFG menu is primarily used to turn an  
option on or off. When scrolling through these menus,  
The Entelli-Switch 250 has many logic options. Each  
controller is downloaded with options at the time of  
manufacture. The collection of options that any one  
controller has is specified at the time of order placement.  
The following pages include all the options that can  
reside in the controller. Not all units include all options.  
Source 2 Position  
LED (Red) indicates  
Power Panel (ATS)  
is closed to  
Source 2 position  
Source 1 LED (Green)  
indicates Source 1 is  
acceptable for use  
Source 1 Position LED (Green)  
indicates Power Panel (ATS)  
is closed to Source 1 position  
Source 2 (Red)  
indicates Source 2  
is acceptable for use  
LCD Screen  
Exercise Event  
"Impending"  
S1 OK  
01: 50  
FRI 31 MAY 2003  
* E *  
CurrentTime,  
Day and  
Date of Display  
SET Menu  
MORE CFG TEST SET  
Keypad  
Menus (MORE, CFG,TEST)  
#4 or the word  
on the LCD above the key.  
The word above the key  
changes depending on which  
screen is being displayed.  
#2 or the word  
#3 or the word  
#1 or the word  
on the LCD above the key.  
The word above the key  
changes depending on which  
screen is being displayed.  
on the LCD above the key.  
The word above the key  
changes depending on which  
screen is being displayed.  
on the LCD above the key.  
The word above the key  
changes depending on which  
screen is being displayed.  
Figure 8  
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GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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User Setting for Voltage & Frequency  
Standard 3-Phase Sensing  
on 3 and 4 Pole Units  
Under Voltage "Fail"  
Factory Default: 80%  
Source 1  
This adjustment determines the low voltage threshold.  
Adjust via the SET menu. Range is 75% to 98% in 1%  
increments (see page 18).  
Under Voltage "Restore"  
Factory Default: 90%  
This adjustment determines the minimum acceptable  
voltage required to transfer to Source 1.  
Adjust via the SET menu. Range is 85% to 100% in  
1% increments (see page 18).  
"Fail" must be a minimum of 2 % below "Restore"  
setting. Once voltage falls below threshold, T timer  
will be bypassed to expedite the transfer to Source 1.  
Once satisfied, the T timer will begin timing  
to transfer to Source 1.  
Over Voltage "Fail"  
Factory Default: 110%  
This adjustment determines the maximum acceptable  
Over Voltage. Adjust via the SET menu. Range is 105%  
to 110% in 1% increments (see page 18). Once exceed-  
ed, the T timer will be bypassed to expedite the transfer  
to Source 1.  
Under Voltage "Fail"  
Factory Default: 80%  
This adjustment determines the low voltage threshold.  
Adjust via the SET menu. Range is 75% to 98% in 1%  
increments (see page 18).  
"Fail" must be a minimum of 2 % below "Restore"  
setting. Once voltage falls below threshold, P timer  
begins timing to signal Source 2 Generator to start.  
Over Voltage "Restore"  
Factory Default: 105%  
This adjustment determines the minimum acceptable  
Over Voltage threshold at which the transfer switch is  
allowed to transfer to Source 2. Adjust via the SET  
menu. Range is 103% to 105% in 1% increments  
(see page 18). “Restore” must be a minimum of  
2% below “Fail” setting.  
Under Frequency "Restore"  
Factory Default: 95%  
This adjustment determines the minimum acceptable  
frequency required to transfer to Source 1.  
Adjust via the SET menu. Range is 90% to 100% in  
1% increments (see page 18).  
Once satisfied, the T timer will begin timing  
to transfer to Source 1.  
Under Frequency "Restore"  
Factory Default: 95%  
Under Frequency "Fail"  
Factory Default: 90%  
This adjustment determines the minimum acceptable  
frequency required to transfer to Source 2.  
Adjust via the SET menu. Range is 90% to 100% in  
1% increments (see page 18).  
Once satisfied, the W timer will begin timing  
to transfer to Source 2.  
This adjustment determines the low frequency threshold.  
Adjust via the SET menu. Range is 88% to 98% in 1%  
increments (see page 18).  
"Fail" must be a minimum of 2 % below "Restore"  
setting. Once satisfied, the T timer will begin timing to  
transfer to Source 1.  
Under Frequency "Fail"  
Over Frequency "Restore"  
Factory Default: 90%  
Factory Default: 102%  
This adjustment determines the low frequency threshold.  
Adjust via the SET menu. Range is 88% to 98% in  
1% increments (see page 18).  
"Fail" must be a minimum of 2 % below "Restore" setting.  
Once satisfied, the W timer will begin timing to transfer  
to Source 2.  
This adjustment determines the minimum acceptable  
Over Frequency threshold at which the transfer switch  
is allowed to re-transfer to Source 1.  
Adjust via the SET menu. Range is 102% to 104% in  
1% increments (see page 18). “Restore” must be a  
minimum of 1% below “Fail” setting.  
Over Frequency "Fail"  
Over Frequency "Fail"  
Factory Default: 105%  
Factory Default: 105%  
This adjustment determines the maximum acceptable  
Over Frequency.  
Adjust via the SET menu. Range is 103% to 105% in 1%  
increments (see page 18).Once exceeded, the P timer  
begins timing to signal the generator to start.  
This adjustment determines the maximum acceptable  
Over Frequency. Adjust via the SET menu. Range is  
103% to 105% in 1% increments (see page 18). Once  
exceeded, the T timer will be bypassed to expedite the  
transfer to Source 1.  
Source 2  
Over Frequency "Restore"  
Factory Default: 102%  
Under Voltage "Restore"  
Factory Default: 90%  
This adjustment determines the minimum acceptable  
Over Frequency threshold at which the transfer switch is  
allowed to re-transfer to Source 2. Adjust via the SET  
menu. Range is 102% to 104% in 1% increments  
(see page 18). “Restore” must be a minimum of  
1% below “Fail” setting.  
This adjustment determines the minimum acceptable  
voltage required to transfer to Source 2.  
Adjust via the SET menu. Range is 85% to 100% in  
1% increments (see page 18).  
Once satisfied, the W timer will begin timing  
to transfer to Source 2.  
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GE Zenith Controls  
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Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Accessory Group Packages  
Table 2  
Group Packages  
Accessories  
STDS  
EXES  
CONS  
SENS  
SPES  
PSGS  
6P  
A1  
A1E  
A3  
2
2
2
2
2
2
2
2
3
3
A4  
Calibrate  
CDT  
CDP  
**DS  
*DT  
*DW  
E
EL/P  
K/P  
L1  
L2  
L3  
L4  
*LN  
P1  
Q2  
Q3  
Q7  
R1-1  
R1-3  
R15  
*R15D  
R16  
R50  
S5P  
S12P  
S13P  
T
2
2
2
2
2
2
2
2
2
2
2
2
T3/W3  
U
UMD  
VI  
W
YEN  
Standard Accessory included in the group package.  
Optional Accessory not included but can be added to group package.  
Optional Accessory. Can not be used with accessory having the same symbol.  
N/A  
Denotes an Accessory with 2 circuits as a standard.  
Denotes an Accessory with 3 circuits as a standard.  
2
2
3
Delayed Transition Units Only.  
Optional for 40-400 Amp  
*
**  
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10  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Accessory Definitions  
6P  
CDT  
Test Switch, Momentary  
Load or NO-Load. One event exerciser with adjustable  
Engine exercise timer. Exercise duration can be set  
between 5 and 60 minutes in 1 minute increments. Can  
be configured to run every 1, 7, 14, or 28 days. Factory  
Default is 20minutes. When exerciser is impending,  
(*E*) appears in the upper right hand corner of LCD  
screen. See page 15 for instructions. Configured via  
CFG (see page 17). Set via SET menu (see page 18).  
6A  
Test Switch, Maintained Auto/Momentary Test  
6AP  
Test Switch, Maintained/Momentary utilizing keypad  
6B  
Test Switch, Maintained - Auto / Momentary - Test,  
Key Operated  
CTAP  
Alarm Panel on transfer to Source 2 with Silence button.  
6C  
DS  
Test Switch, Maintained - Auto / Maintained - Test,  
Key Operated  
Disconnect Switch, Auto/Inhibit.  
Inhibits transfer in either direction when in inhibit.  
Allows automatic operation when in Auto.  
(40-400 Amps optional, 600-4000 Amps standard)  
A1  
Auxiliary Contact, operates on Source 1 line failure.  
DT (DelayedTransition Only)  
A1E  
Time Delay from Neutral Switch position to Source 1  
position. Adjustable 0-10 minutes in 1 second incre-  
ments. Standard setting is 5 seconds Adjust via SET  
menu (see page 18)  
Auxiliary Contact, operates on Source 2 line failure.  
A3  
Auxiliary Contact: Closed in emergency (Source 2)  
Additional Available (10 max.) and need to be specified.  
DW (DelayedTransition Only)  
Time Delay from Neutral Switch position to Source 2  
position. Adjustable 0-10 minutes in 1 second incre-  
ments. Standard setting is 5 seconds.Adjust via SET  
menu (see page 18)  
A4  
Auxiliary Contact: Closed in normal (Source 1)  
Additional Available (10 max.) and need to be specified.  
A62  
E
Sequential Universal Motor Load Disconnect Circuit.  
Normally closed auxiliary contacts for motor loads.  
Open 0-60 seconds prior to transfer, after transfer,  
or both in either direction then re-close in timed  
sequence after transfer.  
Engine Start Contact  
EL/P  
Event Log: Sequentially Numbered Log  
of 16 events that track  
date, time, reason and action taken  
System Data: Total Life Transfers (N2P)  
Days Powered Up  
AB3  
Auxiliary Contact: Closed in bypass emergency  
(Source 2) (S.P.D.T.) (Standard up to 400 Amp)  
Additional Available (10 max.) and need to be specified.  
Total Transfers to S2  
Total S1 Failures  
Time S1 available in Hrs  
Time S2 available in Hrs. (N1P)  
AB4  
Auxiliary Contact: Closed in bypass normal (Source 1)  
(S.P.D.T.) (Standard up to 400 Amp) Additional  
Available (10 max.) and need to be specified.  
F
Fan contact, operates when generator is running.  
B9  
HT  
Battery charger connections.  
Heater and Thermostat  
Calibrate  
K
While monitoring the actual Phase to Phase voltage lev-  
els and Frequency with a calibrated test equipment, the  
Phase to Phase voltage sensing and Frequency can be  
adjusted accordingly. Calibration capabilities are available  
for Frequency and AB, BC, CA Phase to Phase voltage for  
both Sources. Adjust via SET menu (see page 18)  
Frequency Meter, Door mount.  
K/P  
Frequency Indication for S1 and S2  
L
LNP Center-off position LCD-Indicator  
Indicating LED lights:  
CDP  
Clock Exerciser Load/ No Load: Allows the Generator  
to start and run unloaded or to simulate a power  
failure, start Generator and run under load.  
Can be configured by end user for 1, 7, 14,  
28, 365 day cycle. (See page 16)  
L1 Indicates Switch in Source 2 position.  
L2 Indicates Switch in Source 1 position.  
L3 Indicates Source 1 available.  
L4 Indicates Source 2 available.  
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GE Zenith Controls  
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Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Accessory Definitions  
(cont’d)  
Q7  
M1  
Inhibit transfer to Source 1 circuit. Energize Q7 input  
to prevent transfer to Source 1.  
Single Phase Amp Meter  
M2  
R1-1/R1-3  
Three Phase Amp Meter  
Source 1 Over Voltage sensing for single  
and three phase systems.  
M80  
Source 1 Over Voltage "Fail"  
Factory Default: 110%  
3000 Digital Power Monitor  
This adjustment determines the maximum acceptable  
over voltage. Adjust via the SET menu. Range is 105%  
to 110% in 1% increments (see page 18).  
Once exceeded, the P timer begins timing to signal  
the Generator to start.  
M82  
5200 Digital Power Meter  
M83A  
EPM 5300 Digital Power Meter with Modbus Port  
Source 1 Over Voltage "Restore"  
M83B  
Factory Default: 105%  
EPM 5350 Digital Power Meter with Ethernet Port  
This adjustment determines the minimum acceptable  
over Voltage threshold at which the Transfer Switch is  
allowed to automatically transfer to Source 1. Adjust via  
SET menu. Range is 103% to 108% in 1% increments.  
"Restore" must be a minimum of 2% below "Fail" setting  
(see page 18).  
M84  
7430 Digital Power Meter , Wye or Delta  
M85A  
EPM 9450 Digital Power Meter, Ethernet  
R15/R15D  
Should Source 2 become overloaded, a signal  
can be given to switch to the dead or Mid position.  
M85B  
Load Shed  
EPM 9450 Digital Power Meter with Internal 56K Mod.  
M86A  
EPM 9650 Digital Power Meter, Wye or Delta,  
RS232 or RS485  
R16  
Phase Rotation Sensing  
Can be turned on or off via CFG menu (see page 17).  
Factory Default is on.  
M86B  
EPM 9650 Digital Power Meter, Wye or Delta,  
RS232 or RS485  
This feature prevents Line Source to Line Source trans-  
fers from occurring between dissimilar phase sequences.  
This condition is primarily caused by an installation  
error. Connections from Source 1 and Source 2 need  
be verified, compared, and corrected to remedy the  
inconsistent phase rotation between the sources.  
WARNING: Turning off this feature can cause  
severe damage to loads.  
N1  
Running Time Meter, Door mount  
N2  
Operation Counter, Door Mount  
P1  
R26  
Time Delay Source 2 Start. Adjustable 0-10 seconds.  
Standard setting is 3 seconds.  
Adjust via SET menu (see page 18)  
Interruptable Power Rate Provisions.  
Allow transfer out of Source 1 position to Source 2 or  
dead Source 2. Alarm and Pre-Signal circuit included.  
P2  
R50  
Time Delay S2 Start. Adjustable 1/6 to 300 seconds.  
In Phase Monitor this feature restricts Live to Live  
Source Transfers to occur unless both Sources are within  
7 electrical degrees or less of each other. (live Source to  
live Source transfers usually occur during transfer back  
to Source 1 or during Testing). R50 does not change  
the operation of the Automatic Transfer Switch in a  
power failure mode. After all timer functions have  
elapsed, the CHECKING FOR SOURCE SYNCHRO-  
NISM will be displayed as well as the direction of  
transfer (S1-S2 for example denotes transfer from  
Source 1 to Source2). When synchronism is accomplished,  
transfer will take place.  
Q2  
Remote Peak Shave or Area Protection Circuit.  
Energize Q2 to simulate Source 1 Line failure causing  
the Generator to start and transfer the load to Source 2.  
Should Emergency fail during this operation, Transfer  
Switch will retransfer back to Source 1.  
Q3  
Remote inhibit transfer to Source 2 circuit. Energize  
Q3 input to allow transfer to Source 2. To enable Q3  
option, engage Q3 jumper.  
■
■
12  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Accessory Definitions  
(cont’d)  
Notes: - If S2 Frequency is less than S1 Frequency,  
S13P  
display will show a series of (- - - - -…..) symbols.  
- If S2 Frequency is greater than S1 Frequency,  
display will show a series of (+++++…..) symbols.  
- Each (-) or (+) symbol represents 10 electrical  
degrees out of phase. A maximum of 18 symbols  
(180 electrical degrees) can be monitored.  
- The number of (-) or (+) symbols decrease  
as the two sources approach synchronism  
and increase as the two sources drift out  
of synchronism.  
Transfer Commit. Configured via CFG menu.  
(see page 17) When this Feature is set to OFF:  
The transfer Switch is not committed to transfer unless  
the outage duration is longer than the timers that  
precede the transfer to Source 2 position. This assumes  
that the outage will be an isolated event. When this  
Feature is set to ON: The transfer Switch is committed  
to transfer to Source 2 position once the W timer has  
begun timing, even if Source 1 power returns before  
the transfer to Source 2. This is to ensure that the  
transfer takes place, because one outage may be  
followed by another.  
- If S1 and S2 Frequencies are identical, the  
display will show a series of alternating  
- - - -  
symbols (++++…) which also indicate the  
S14  
approximate out of phase degrees  
Test / Auto / Source 1 Selector, Door mount  
In the event that the Sources do not come within 7  
electrical degrees of each other within 60 seconds, the  
unit will display the message: SYNCH CHECKING and  
will allow the user to BYPASS. If the BYPASS button is  
pressed, the unit will display the message: WARNING  
MAY CAUSE DAMAGE TO THE LOAD. Pressing XFR  
will actually bypass the R50. Since R50 is a passive device,  
the length of time it takes to reach Synchronism is de-  
pendent on the frequency difference between the two  
Sources. Source 1 is usually a Utility and the frequency  
is not within the control of the consumer. Source 2  
needs to be adjusted to create an adequate difference  
in order for the transfer to happen a timely fashion.  
SW1  
Auto/Off/Start Engine control selector, Door mount  
(Keyed or non-keyed operation available)  
SW2  
Auto / Off Engine control selector, Door mount  
(Keyed or non-keyed operation available)  
SW3  
Source Priority Selector Switch, Door mount  
Allows selection of Source 1 or Source 2 to be the Prime  
Source. Transfer Switch will transfer to selected Prime  
Source if that Source is available. (Keyed or non-keyed  
operation available)  
Note: For optimum performance, Source 2  
Generator should be adjusted a Maximum of  
2 Hertz above or below the Utility frequency,  
minimum of 0.1 Hertz. (58 to 59.9) or  
T
Time Delay (S1) Source 1 Stable Timer. To delay trans-  
fer to Source 1 (immediate retransfer on Source 2 fail-  
ure). Adjustable 0-60 minutes in 1 second increments.  
Standard setting is 30 minutes. Adjust via SET menu  
(see page 18)  
(60.1 to 62) Hertz. Adjustment of Generator  
to 60Hertz could cause lengthy transfer delay.  
R50 Feature can be turned ON or OFF via CFG Menu  
(see page 17). Factory Default if OFF.  
S5P  
T3/W3  
Auto / Semi Manual selector  
Elevator Pre-Signal Auxiliary Contacts: Open 0-60  
seconds prior to transfer to either direction,  
re-closes after transfer.  
In "Auto" position, retransfer to Source 1 is automatic  
after the T timer has timed out. The T time delay is  
bypassed if Source 2 fails.  
In "Manual", retransfer to Source 1 is upon depression  
of BYPASS DELAY button YEN or if Source 2 fails.  
U
(S2) Source 2 Stop Delay Timer. Allows Engine to run  
unloaded after switch retransfer to Source 1. Adjustable  
0-60 minutes in 1 second increments. Standard setting is  
5 minutes. Adjust via SET menu (see page 18)  
S12P  
Auto / Manual Selector  
In "Auto" position, the Automatic Transfer Switch  
functions automatically as specified with the Switch  
drawings.  
In "Manual" the Automatic Transfer Switch will transfer  
to either direction upon depression of Source 1 or  
Source 2 transfer buttons.  
UMD  
Universal Motor Load Disconnect Circuit: Auxiliary  
Contact opens 0-60 seconds prior to transfer in either  
direction, re-closes after transfer. Can be configured by  
end user for Pre-transfer, Post-transfer, or both.  
Should Source 1 fail, the Generator (Source 2), will  
automatically start. Once transferred in Manual, the  
Switch maintains position selected even if selected  
power fails.  
■
■
GE Zenith Controls  
13  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Accessory Definitions  
(cont’d)  
VI  
W
Voltage Imbalance (Three Phase)  
Time Delay (S2) Source 2 Stable Timer. To delay trans-  
fer to Source 2. Adjustable 0-5 minutes in 1 second  
increments. Standard setting is 1 second. Adjust via SET  
menu (see page 18)  
For a three phase source, this feature monitors phase  
voltage ratios based on a selected range within a  
selected time window. Should any phase fall below the  
selected lower window limit or exceed the selected  
higher window limit within the selected time frame,  
the controller initiates transfer to the other source.  
YEN  
Bypass Timers Key utilizing Keypad. When applicable,  
the system prompts the user to press a button to bypass  
(T) or (W) Timers should the user so desires.  
Range: 5% to 20% of Nominal voltage,  
10 to 30 seconds window, user adjustable.  
Resolution: 1% Increments  
Minimum Differential: 2% between “Fail”  
and “Restore” settings.  
ZNET  
Network Communications Interface Card  
Factory default: 10% “Fail”, 8% “Restore”, 30 Seconds.  
See CFG Menu page 17 to configure ON or OFF.  
See SET Menu page 18 to set Percentage and time  
windows  
How to Set the System Clock  
How to Set the System Clock  
Set System Clock, time and date  
12. Press SAVE (This will enter this value and complete  
the clock setting).  
13. Use the up and down keys to change the date.  
14. Press SAVE (this will enter this value and move  
cursor to year).  
15. Use the up and down keys to change year.  
16. Press SAVE (this will enter this value and  
compete the clock setting).  
·
If the clock is not set, the display will show  
SET SYSTEM CLOCK on the second line  
of the S1 OK screen.  
·
The S1 OK screen will show time (hours and  
minutes) on the second line if the system clock  
has been set. (Date on third line)  
Setting the System Clock  
(Start from S1 OK screen)  
1. Remove battery protective white plastic strip  
near P relay. *  
17. To edit settings, press SEL and repeat steps 6-16.  
18. If the setting is satisfactory, press MORE  
(unit then returns to the SET menu then  
press BACK, then ESC.)  
2. Press MORE then press SET.  
3. Press MORE and scroll to SET SYSTEM CLOCK  
using the MORE key.  
*
Replacement battery part #K-4100  
Battery will last 5 years and provides power to retain clock  
function only (Controller functions without battery).  
4. Press SEL.  
5. ENTER ACCESS CODE located on the white label  
on the back of the controller.  
6. Press SEL.  
7. Use the up and down keys to change the hour value.  
8. Press SAVE (this will enter this value and move  
cursor to minutes).  
9. Use the up and down keys to change the minutes.  
10. Press SAVE (this will enter this value and move  
cursor to month).  
11. Use the up and down key up to change the month.  
■
■
14  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
CDT One EventTimer Exerciser  
•
If the CDT Exerciser is Factory configured for a  
Load Exerciser, the Controller will immediately start  
a load exercise. The controller will start the  
generator, transfer the load to Source 2 and remain  
in Source 2 for the duration set for EXER S2 RUN  
TIME in the SET menu. The controller will  
Load or No-Load  
One event Exerciser with adjustable Timer. Exercise  
duration can be set between 5 and 60 minutes in  
1 minute increments. Can be configured to run every  
1,7,14, or 28 days. Factory default is 20 minutes.  
retransfer the load back to Source 1 after the S1  
stable timer has timed out and run the generator  
unloaded for the duration of the S2 stop delay timer  
(Engine Cool Down Timer).  
If the CDT Exerciser is Factory configured for a  
No-Load Exerciser, the Controller will immediately  
start a No-load exercise. The controller will start the  
generator and run it unloaded for the duration of  
the S2 stop delay timer (Engine Cool Down Timer).  
How to CONFIGURE (CFG) and Set (SET)  
the Timer Exerciser  
1. Beginning from the S1 OK screen,  
press MORE then CFG.  
2. Press MORE to scroll to CONFIG TIMER  
EXERCISER screen.  
3. The third line of the CONFG TIMER EXERCISER  
will show either DAILY, WEEKLY, 14 DAY, 28 DAY,  
or OFF.  
•
Exercise will be repeated at the same time as initiated  
on every 1, 7, 14, or 28 days according to the selection  
made in the Configure CFG menu.  
4. If the third line of the CONFG TIMER EXERCISER  
shows DAILY, WEEKLY, 14 DAY, or 28 DAY as  
desired, then proceed to step 10.  
5. If the third line of the CONFG TIMER EXERCISER  
shows OFF or if another timer selection is desired,  
continue.  
How to Bypass (Cancel) an exercise during  
an exercise cycle  
1) Press BPASS  
6. Press SEL.  
2) Allow the controller to complete the Engine  
cool down cycle  
7. Enter ACCESS code located on white label  
on the back of the controller.  
If the CDT Exerciser is Factory configured for a  
No-Load Exerciser Or allow the controller to complete  
retransfer to Source 1 If the CDT Exerciser is Factory  
configured for a Load Exerciser  
8. Press UP or DOWN to select DAILY, WEEKLY,  
14 DAY, or 28 DAY as desired.  
9. Press SAVE.  
10. Press MORE to scroll to CONFG TIMER  
EXERCISER (XFR) or (NO XFR).  
11. Press Up or Down to select XFR (Load Transfer)  
or NO XFR (No Load Transfer).  
How to Bypass the next exercise event and Keep  
the rest of scheduled events unchanged  
1) Press Test  
12. Press SAVE.  
2) Press MORE  
13. Press MORE repeatedly to BACK then S1 OK screen.  
3) Press BYPASS EXER  
To re-institute the next exercise event back,  
press CANCL BPASS  
Set (SET) the Exerciser:  
14. Beginning from the S1 OK screen,  
press MORE then SET.  
How to initiate a new exercise start time  
1) Press TEST  
15. Press MORE repeatedly until  
EXER S2 RUN TIME screen.  
2) Press MORE  
16. Press SEL  
3) Press EXER CANCL  
4) Press START TIMER TEST  
17. Enter ACCESS code located on white label  
on the back of the controller.  
18. Press SEL  
How to check the next exercise event  
1) From S1 OK screen, press MORE three times.  
2) The unit will display the PLANT EXERCISER NEXT  
event in DAYS, HOURS, and MINUTES  
3) Press ESC to S1 OK Screen.  
19. Cursor is indicated as a line under character to  
be changed. Change values with up and down keys.  
20. Press SAVE when complete.  
21. Press MORE repeatedly until SET USER SETUP  
then press BACK then ESC to the S1 OK screen.  
Notes:  
-
How to Initiate CDT Exerciser and to start an  
exercise cycle every 1, 7, 14, or 28 days  
From S1 screen  
*E* appears in the upper right hand corner  
of LCD screen when exercise is impending.  
For Load Exerciser, actual exercise period  
(ATS in S2 position)= CDT (Exerciser)  
-
1) Press TEST  
2) Press MORE  
timing period +T (S1 stable Timer) timing period.  
3) Press START TEST TIMER (to initiate Test).  
■
■
GE Zenith Controls  
15  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
CDP Clock Exerciser  
6. Cursor is indicated as a line under character to  
be changed. Change values with up and down keys.  
Press SAVE after each entry to save value and to  
move to the next value to be changed.  
Load / No-Load Clock Exerciser  
Allows the Generator to start and run unloaded or to  
simulate a power failure, start Generator and run under  
load. Can be configured by the end user for 1, 7, 14, 28,  
or 365 day cycles.  
7. Press BACK when complete.  
8. Press MORE repeatedly until SET USER SETUP.  
Press BACK then ESC to the S1 OK screen.  
•
A total of 7 independent No Load exercise periods  
(up to 10 hours each) can be programmed for each  
of the daily, weekly, 14-day, and 28-day exercisers.  
A total of 12 independent No Load exercise periods  
(up to 10 hours) can be programmed for the  
365-day Exerciser.  
How to Bypass (Cancel) an exercise during  
an exercise cycle  
1) Press BPASS  
•
2) Allow the controller to complete the Engine  
cool down cycle.  
If the CD Exerciser is configured or Set for a No-Load  
Exercise. Or allow the controller to complete retransfer  
to Source 1. If the CD Exerciser is configured for a  
Load Exerciser  
How to Configure (CFG) the Exerciser  
1. Beginning from the S1 OK screen, press MORE  
then CFG.  
2. Press MORE to scroll to CONFIG CLOCK  
EXERCISER screen.  
3. The third line of the CONFG CLOCK EXERCISER  
will show either DAILY, WEEKLY, 14 DAY, 28 DAY,  
365 DAY or OFF.  
4. If the third line of the CONFG CLOCK EXERCISER  
shows DAILY, WEEKLY, 14 DAY, 28 DAY, or 365 DAY  
as desired, press MORE repeatedly to BACK.  
Press ESC then proceed to the SET menu to  
set the EXERCISER.  
How to Bypass the next exercise event and Keep  
the rest of scheduled events unchanged  
1) Press TEST  
2) Press MORE  
3) Press BYPASS EXER  
To re-institute the next exercise event back,  
press CANCL BPASS  
5. If the third line of the CONFG CLOCK EXERCISER  
shows OFF, continue.  
6. Press SEL.  
7. Enter ACCESS code located on white label on  
the back of the controller.  
8. Press UP or DOWN to select DAILY, WEEKLY,  
14 DAY, 28 DAY, or 365 DAY as desired.  
9. Press SAVE.  
How to check the next exercise event  
1) From S1 OK screen, press MORE three times.  
2) The unit will display the PLANT EXERCISER NEXT  
event in DAYS, HOURS, and MINUTES  
3) Press ESC to S1 OK Screen.  
Notes:  
•
•
•
•
In the S1 OK screen, an (*E*) appears in the upper  
right hand corner of LCD screen when exercise  
is impending.  
For Load Exerciser, actual exercise period  
(ATS in S2 position)= CDT (Exerciser)  
timing period +T (S1 Stable Timer) timing period.  
A value greater than zero must be entered in the  
Exerciser duration field to be accepted as a valid  
exercise period.  
The Exercise cycle will be repeated on a regular  
basis as programmed and initiated in the SET menu  
depending on what Exerciser was configured  
(selected) in the CFG menu.  
10. Press MORE repeatedly to BACK then ESC  
to S1 OK screen.  
How to set (SET) the DAILY Exerciser  
1. Beginning from the S1 OK screen, press MORE  
then SET.  
2. Press MORE repeatedly until SET EXERCISER  
screen.  
3. Press SEL.  
4. Enter ACCESS code located on white label  
on the back of the controller.  
5. Press SEL  
Cursor  
Indicates # of  
Exercise Periods  
Load No-Load (CDP)  
Exercise Indicator  
#1  
SET  
NL  
Indicates type of Exerciser  
DAILY, WEEKLY, 14-DAY,  
28-DAY or 365-DAY  
EXERCISER  
00:00  
SAVE  
Exercise duration for this  
event in hours and minutes  
up to 10 hours per event  
v
BACK  
^
Indicates Exerciser start:  
Time for DAILY Exerciser  
Time & Day for WEEKLY Exerciser  
Time, Date & Month for 14-DAY,  
28-DAY and 365-DAY Exerciser  
(24 Hour System)  
Up and Down  
Use to change values.  
To save value and to  
move cursor to next  
field to be changed.  
To previous field  
or to exit screen.  
Figure 9  
■
■
16  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Entelli-Switch 250 User Setup - CFG Menu  
S1 OK  
01: 50  
FRI 31 MAY 2003  
Turn options ON or OFF via  
keypad through the CFG menu  
MORE  
TEST  
Enter six digit access code  
(The factory assigned six-digit access code  
is located on the back of the controller)  
1 VAB = ___  
VBC = ___  
VCA = ___  
2 VAB = ___  
VBC = ___  
VCA = ___  
MORE  
MORE  
CFG  
SET  
ESC  
WARNING  
1
Controller inputs must be relay isolated.  
Customer  
Input  
Voltage  
Network Communications  
(Option)  
CONFIG  
USER SETUP  
{
*
J2  
1
PROG 1  
J2-3  
N.O.  
To J2/J4 Input  
N.C.  
BACK  
2
3
PROG 2  
GRD (Input Sink)  
LS OUT  
4
2
Controller ouputs have limited source capability.  
Use only GE Zenith - specified output modules.  
5
NIA OUT  
6
5
6
7
ELEV. PRE. OUT  
ALARM OUT  
STE OUT  
11  
12  
13  
Output Contacts  
1
2
From J2/J4  
Output  
7
{
{
R1  
R2  
8
—TIMER EXERCISER (CDT)  
1, 7, 14, 28 Day (pg. 11 & 15)  
8
9
10  
14  
15  
16  
3
4
Output Contacts  
9
J4-3  
10  
11  
12  
13  
14  
15  
16  
MOTOR DISC. OUT  
—CLOCK EXERCISER  
LOAD OR NO LOAD (CDP)  
1, 7, 14, 28, 365 Day (pg. 11 & 16)  
TMS IN  
11  
12  
13  
5
6
7
INHIB. > S1  
INHIB. > S2  
LS IN  
R1  
Output  
R1  
Output  
—TEST KEY (6)  
Maintained/Momentary (pg. 11)  
14  
15  
16  
8
9
*
Input and output availability  
subject to factory configuration.  
R2  
Output  
R2  
Output  
*
J4  
—TRANSFER COMMIT (S13)  
ON/OFF (pg. 13)  
10  
1
2
Contact Rating: 10A @ 277VAC or 30VDC  
3
+12V (Output Source)  
LN OUT  
L4 OUT  
4
—AUTO / MANUAL (S5 or S12)  
ON/OFF (pg. 13)  
Lithium Battery  
User Access Code  
Exerciser Battery  
5
Replacement - K-4100 (BR2032)  
6
Service Life - 10 Years+  
L3 OUT  
7
+ During normal operation  
L2 OUT  
—IN-PHASE MONITOR (R50)  
ON/OFF (pg. 13)  
8
L1 OUT  
Default - 121212  
9
YN IN  
10  
11  
12  
13  
14  
YE IN  
Product Information www.geindustrial.com  
TSNL IN  
Q2/TSL IN  
S12 IN  
—S1 OVER VOLTAGE (R1-1 or R1-3)  
ON/OFF (pg. 12)  
24-Hour Service  
(773) 299-6600  
S5 IN  
—S1 UNDER FREQUENCY  
ON/OFF (pg. 9)  
TM  
Entelli-Switch 250  
—S2 OVER VOLTAGE  
ON/OFF (pg. 9)  
Figure 10  
—S2 OVER FREQUENCY  
ON/OFF (pg. 9)  
—PHASE IMBALANCE (VI)  
ON/OFF (pg. 14)  
—PHASE ROTATION MATCH (R16)  
ON/OFF (pg.12)  
—LOAD DISCONNECT TD (UMD)  
(pg.13)  
—TRANSFER ALARM (CTAP)  
ON/OFF (pg.11)  
—NETWORK (ZNET)  
ON/OFF (pg. 14)  
Optional Accessories  
■
■
GE Zenith Controls  
17  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Entelli-Switch 250 User Setup - SET Menu  
S1 OK  
01: 50  
FRI 31 MAY 2003  
Change adjustable values  
through the SET menu.  
MORE  
TEST  
Enter six digit access code  
(The factory assigned six-digit access code  
is located on the back of the controller)  
1 VAB = ___  
VBC = ___  
VCA = ___  
2 VAB = ___  
VBC = ___  
VCA = ___  
MORE  
MORE  
CFG  
SET  
ESC  
WARNING  
1
Controller inputs must be relay isolated.  
Customer  
Input  
Voltage  
Network Communications  
(Option)  
{
SET  
USER SETUP  
*
J2  
1
PROG 1  
J2-3  
N.O.  
To J2/J4 Input  
N.C.  
2
3
PROG 2  
BACK  
GRD (Input Sink)  
LS OUT  
4
2
Controller ouputs have limited source capability.  
Use only GE Zenith - specified output modules.  
5
NIA OUT  
6
5
6
7
ELEV. PRE. OUT  
ALARM OUT  
STE OUT  
11  
12  
13  
Output Contacts  
1
2
From J2/J4  
Output  
7
{
{
R1  
R2  
8
8
9
10  
14  
15  
16  
Output Contacts  
3
4
9
—SET SYSTEM CLOCK (pg.14)  
—DAYLIGHT SAVINGS ON/OFF  
J4-3  
10  
11  
12  
13  
14  
15  
16  
MOTOR DISC. OUT  
TMS IN  
11  
12  
13  
5
6
7
INHIB. > S1  
INHIB. > S2  
LS IN  
R1  
Output  
R1  
Output  
—CLOCK EXERCISER (CDP)  
(pg.11 & 16)  
14  
15  
16  
8
9
*
Input and output availability  
subject to factory configuration.  
R2  
Output  
R2  
Output  
—EXER S2 RUNTIME (CDT)  
(pg.11 & 15)  
*
J4  
10  
1
2
Contact Rating: 10A @ 277VAC or 30VDC  
3
+12V (Output Source)  
LN OUT  
L4 OUT  
—S1 UNDER VOLTAGE (pg.9)  
4
Lithium Battery  
User Access Code  
Exerciser Battery  
5
Fail  
Restore  
Replacement - K-4100 (BR2032)  
6
Service Life - 10 Years+  
L3 OUT  
7
+ During normal operation  
L2 OUT  
8
L1 OUT  
Default - 121212  
9
YN IN  
—S1 UNDER FREQUENCY (pg.9)  
10  
11  
12  
13  
14  
YE IN  
Product Information www.geindustrial.com  
Fail  
Restore  
TSNL IN  
Q2/TSL IN  
S12 IN  
24-Hour Service  
(773) 299-6600  
S5 IN  
—S1 OVER VOLTAGE (pg.12)  
TM  
Entelli-Switch 250  
Fail  
Restore  
Figure 10  
—S1 OVER FREQUENCY (pg.9)  
—TIME DELAY S2 START (P1)  
(pg.12)  
Fail  
Restore  
—TIME DELAY S2 STABLE (W)  
(pg.14)  
—S2 UNDER VOLTAGE (pg.9)  
Fail  
Restore  
—LOAD PRESIGNAL TD (T3/W3)  
(pg.13)  
—S2 UNDER FREQUENCY (pg.9)  
Fail  
Restore  
—LOAD DISCONNECT TD (UMD)  
(pg.13)  
—S2 OVER VOLTAGE (pg.9)  
—ATS OPEN TIME TO S2 (DW)  
DELAY units only (pg.11)  
Fail  
Restore  
—TIME DELAY S1 STABLE (T) (pg.13)  
—S2 OVER FREQUENCY (pg.9)  
Fail  
Restore  
—ATS OPEN TIME TO S1 (DT)  
DELAY units only (pg.11)  
—SET % PHASE IMBALANCE (VI)  
FAIL 5%, RESTORE 3% (pg.14)  
—S2 STOP DELAY (U) (pg.13)  
—CALIBRATE S1 (pg.11)  
—CALIBRATE S2 (pg.11)  
—SET PHASE IMBALANCE (VI)  
TIME DELAY 30 seconds (pg.14)  
Optional Accessories  
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18  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Entelli-Switch 250 User Setup - System Info  
View System Data  
S1 OK  
01: 50  
FRI 31 MAY 2003  
Enter six digit access code  
(The factory assigned six-digit access code  
is located on the back of the controller)  
MORE  
TEST  
WARNING  
1
Controller inputs must be relay isolated.  
—PHASE TO PHASE VOLTAGE, S1 & S2  
Customer  
Input  
Voltage  
Network Communications  
(Option)  
{
—FREQUENCY INDICATION FOR S1 & S2  
(K/P) (pg.11)  
*
J2  
1
PROG 1  
J2-3  
N.O.  
To J2/J4 Input  
N.C.  
2
3
PROG 2  
—PLANT EXERCISER:  
Next Impending Exerciser  
(shows only if set)  
GRD (Input Sink)  
LS OUT  
4
2
Controller ouputs have limited source capability.  
Use only GE Zenith - specified output modules.  
5
NIA OUT  
6
5
6
7
ELEV. PRE. OUT  
ALARM OUT  
STE OUT  
11  
12  
13  
Output Contacts  
1
2
From J2/J4  
Output  
7
{
{
R1  
R2  
8
8
9
10  
14  
15  
16  
3
4
Output Contacts  
9
—SYSTEM INFO:  
J4-3  
10  
11  
12  
13  
14  
15  
16  
MOTOR DISC. OUT  
Serial #: Unit Serial #  
Rev #:  
Software Revision #  
TMS IN  
11  
12  
13  
5
6
7
INHIB. > S1  
INHIB. > S2  
LS IN  
Event Log: Sequentially Numbered Log  
R1  
R1  
Output  
of 16 events that track  
Output  
date, time, reason and action taken  
Data:  
Total Life Transfers (N2P)  
14  
15  
16  
8
9
*
Input and output availability  
subject to factory configuration.  
Days Powered Up  
R2  
Output  
R2  
Output  
*
J4  
Total Transfers to S2  
Total S1 Failures  
Time S1 available in Hrs  
Time S2 available in Hrs. (N1P)  
10  
1
2
Contact Rating: 10A @ 277VAC or 30VDC  
3
+12V (Output Source)  
LN OUT  
L4 OUT  
4
Lithium Battery  
User Access Code  
Exerciser Battery  
5
Replacement - K-4100 (BR2032)  
6
Service Life - 10 Years+  
L3 OUT  
—CHANGE USER ACCESS CODE  
7
+ During normal operation  
L2 OUT  
8
L1 OUT  
Default - 121212  
9
YN IN  
10  
11  
12  
13  
14  
YE IN  
Product Information www.geindustrial.com  
TSNL IN  
Q2/TSL IN  
S12 IN  
24-Hour Service  
(773) 299-6600  
S5 IN  
TM  
Entelli-Switch 250  
Figure 10  
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■
GE Zenith Controls  
19  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Testing  
CAUTION  
Due to hazardous voltage and current, GE Zenith  
recommends that a GE Zenith Certified technician  
or a qualified electrician must perform the  
installation and maintenance of the switch.  
Test Options  
The ATS can be tested in either of two positions:  
1) “Auto Position”  
Full Transfer Test - This test checks the complete  
operation of the ATS by transferring the load’s  
power source from Source 1 to Source 2.  
2) “Test Position”  
WARNING  
Both power sources must be disconnected  
This procedure is recommended for Preventive  
Maintenance (PM) of ATS without interrupting the  
Load thru the BYPASS/ISOLATION SWITCH.  
before manual operation of the switch.  
NOTE: A periodic test of the transfer switch  
under load conditions is recommended  
to insure proper operation. (See National  
Electric Code articles 700 and 701).  
Introduction  
A manual operator handle is provided with the  
transfer switch for maintenance purposes only. Manual  
operation of the switch must be checked before it is  
operated electrically. Both power sources must be  
disconnected before manual operation of the  
switch. Insert the handle and operate the transfer  
switch between the Source 1 and Source 2 positions.  
The transfer switch should operate smoothly without  
binding. Return the switch to the Source 1 position,  
remove the handle, and return it to the holder provided.  
WARNING  
When performing a hi-pot or dielectric test  
on the power section, DISCONNECT the  
control panel plugs from the microprocessor  
to avoid potential damage.  
After completing the inspection, cleaning and servicing  
of the transfer switch, reinstall the switch cover, and  
close and lock the cabinet door. Reclose the circuit  
breakers feeding the utility and generator sources  
to the switch.  
Initiate the electrical transfer test by activating the  
test switch. P timer will time out and the microcon-  
troller will send an engine start signal. When  
the W time has elapsed, the switch will complete  
its transfer by closing into the Source 2.  
Deactivating the test switch will start retransfer to  
Source 1. The switch will complete its retransfer to  
Source 1 after the time delay of the T timer. The U  
engine overrun timer allows the engine generator to  
run unloaded for a preset cool down period.  
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20  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Testing  
(cont’d)  
NOTICE  
A periodic test of the transfer switch under load conditions is recommended to insure proper operation.  
(See National Electric Code articles 700 and 701)  
ATSTesting  
Start generator and verify proper voltage, frequency and phase  
sequence (match to Source 1). Shut down gen set and place in  
Auto. Complete the visual inspection of the transfer switch, and  
close the cabinet door.  
SYSTEM TEST  
FAST XFR  
NO  
MORE TEST LOAD XFR  
Initiate the test by pressing the TEST button on the LCD  
keypad. The controller will then prompt for your access code.  
After entering the code, three test options will appear—  
XFR LOAD, FAST TEST and NO XFR (See Figure 11).  
•
•
XFR LOAD test starts the generator and using  
the current timer settings, transfers the load  
to Source 2.  
FAST TEST test presets timer values to a maximum  
30 seconds during the test. After completion of  
the test, all timers are reset to their original  
values. (T3, W3, DT and DW remain)  
NO XFR test starts the generator but does not  
transfer the load to the Source 2.  
Figure 11  
to run unloaded. A manual pushbutton BYPASS is provided to  
bypass the "U" time delay if desired. Upon completion of the  
(U) timing cycle, the controller sends an Engine stop signal.  
•
Press and hold the desired test option button until the switch  
transfers to Source 2 (load test) or until the generator has  
been run for the desired amount of time (no load test).  
Releasing the test button before W timer timeout will abort  
the test (Exception: when the transfer commit option, is  
configured “ON”).  
DelayedTransition  
Source 1 Power Failure:  
When the test is initiated, the controller initiates the Time  
Delay Source 2 Start (Engine Start Timer "P") cycle. A manual  
CANCEL button is provided to cancel the test if desired Upon  
completion of the (P) time delay, an Engine start Signal is sent  
to Source 2. When Source 2 voltage and frequency reach the  
preset "Restore" values, the time delay to open Source 1 timer  
(W) begins its timing cycle to ensure voltage and frequency sta-  
bilization before re-transfer. A manual pushbutton BYPASS is  
provided to bypass the "W" time delay if desired. After the (W)  
time delay, the CCNO relay energizes the CNO solenoid to  
open the transfer switch out of Source 1 position. The time  
delay to Source 2 timer (DW) begins its timing cycle. After the  
(DW) time delay, the CCE relay energizes. The switch then  
completes transfer to Source 2 by energizing the CE solenoid.  
The SE limit switch activates to de-energize the CCE relay.  
To test lamps, press TEST then scroll through MORE, then  
press LAMP TEST. To cancel LAMP TEST press MORE.  
StandardTransition  
When the test is initiated, the controller initiates the Time Delay  
Source 2 Start Timer (Engine Start Timer "P") cycle. A manual  
CANCEL button is provided to cancel the test if desired. Upon  
completion of the (P) time delay, an Engine start Signal is sent to  
Source 2. When Source 2 voltage and frequency reach the preset  
"Restore" Values, the time delay to Source 2 Timer (W) begins its  
timing cycle to ensure voltage and frequency stabilization before  
transfer. A manual pushbutton BYPASS is provided to bypass the  
"W" time delay if desired. After the (W) time delay, the CCE relay  
energizes the CE solenoid to close the transfer switch in to Source  
2. The SE limit switch activates to de-energize the CCE relay.  
Restoration of Source 1 Power:  
Deactivating the test switch initiates re-transfer to Source  
1sequence.The delay to open Source 2 Timer (T) begins its tim-  
ing cycle to ensure voltage and frequency stabilization before  
retransfer. A manual pushbutton BYPASS is provided to bypass the  
"T" time delay if desired. After the (T) time delay, the CCEO relay  
energizes the CEO solenoid to open the switch out of Source 2  
position. The time delay to Source 1 timer (DT) begins its timing  
cycle. After the (DT) time delay, the CCN relay energizes the CN  
solenoid to complete re-transfer of the switch to Source 1. The SN  
limit switch activates to de-energize the CCN relay.  
Restoration of Source 1 Power:  
Deactivating the test switch initiates re-transfer to Source 1  
sequence.The delay to Source 1 Timer (T) begins its timing cycle  
to ensure voltage and frequency stabilization before retransfer.  
A manual pushbutton BYPASS is provided to bypass the "T" time  
delay if desired. After the (T) time delay, the CCN relay energizes  
the CN solenoid to retransfer the switch to Source 1. The SN limit  
switch activates to de-energize the CCN relay.  
Immediately after re-transfer, the S2 Stop Delay Timer (Delay  
to Engine Stop "U") begins its cycle to allow Source 2 Engine  
to run unloaded. A manual pushbutton BYPASS is provided to  
bypass the "U" time delay if desired. Upon completion of the  
(U) timing cycle, the controller sends an Engine stop signal.  
Immediately after re-transfer, the S2 Stop Delay Timer (Delay  
to Engine Stop "U") begins its cycle to allow Source 2 Engine  
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GE Zenith Controls  
21  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Testing  
(cont’d)  
NOTICE  
A periodic test of the transfer switch under load conditions is recommended to insure proper operation.  
(See National Electric Code articles 700 and 701)  
ClosedTransition  
GE Zenith Closed Transition Transfer Switches are  
designed to Transfer the Load between two available  
sources with out interrupting power to the Load  
(Make-Before-Break). Paralleling of the two sources  
occurs within a predefined window of synchronization  
and lasts less than 100 milliseconds. The initial Source  
is then disconnected.  
The ATS defaults to an open transition transfer when  
Source 1 fails. Closed transition transfer is not possible  
with only one source available. If the optional Transition  
Mode Selector (TMS) is available, one can select an  
Open Transition Transfer or a Closed Transition  
Transfer when both Sources are available..  
If while in Closed Transition Mode, the ATS fails to  
open the source it is attempting to "transfer out of"  
within 100 milliseconds, an Alarm will sound and the  
source that the ATS just closed into will be opened  
leaving the ATS in its initial source while disabling all  
other transfer operations until the problem is corrected  
and the "Fail to Open Lockout Reset" has been pressed.  
Initiating a Closed Transition  
When a Test is initiated, the controller initiates the  
Time Delay Source 2 Start (Engine Start Timer "P")  
cycle. Upon completion of the (P) time delay, an  
Engine start Signal is sent to Source 2. When Source 2  
voltage and frequency reach the preset "Restore" values,  
the time delay to open Source 1 timer (W) begins its  
timing cycle. After the (W) time delay, the ATS closes  
into Source 2 only after the controller ensures the prop-  
er phase relationship between the two Sources. After the  
ATS closes into Source 2, the SE limit switch becomes  
activated to de-energize the CCE relay and energize  
the CCNO relay which opens the ATS out of Source 1.  
The SNO limit switch activates to de-energize the  
CCNO relay. The ATS has now closed into Source 2  
position without interrupting the load.  
A signal will be provided (STE) to Shunt Trip the  
Generator Circuit Breaker if the Transfer Switch  
remains closed into both Sources for more than 325  
milliseconds. The load will then be fed by the Source 1.  
The maximum time that the two Sources would be  
parallel, under these conditions, is less than 500  
milliseconds. Before operating the Closed Transition  
Transfer Switch, the condition must be corrected and  
the Shunt Trip reset. Refer to procedure for servicing  
the Switch after Shunt Tripping occures.  
Re-Transfer with Closed Transition  
Deactivating the Test Switch initiates the re-transfer.  
When Source 1 voltage and frequency reach the preset  
"Restore" values, the time delay to open Source 2 timer  
(T) begins its timing cycle. After the (T) time delay, the  
ATS closes into Source 1 only after the controller  
ensures the proper phase relationship between the two  
Sources. After the ATS closes into Source1, the SN limit  
switch becomes activated to de-energize the CCN relay  
and energize the CCEO relay which opens the ATS out  
of Source 2. The SEO limit switch activates to de-ener-  
gize the CCEO relay. The ATS has now closed back into  
Source 1 position without interrupting the load.  
The unit is Factory set to accomplish transfer  
within 5 electrical degrees.  
Requires an Isochronous Governor with an  
operating frequency of 60+/- 0.2 Hz.  
Requires a Shunt Trip Breaker on the Generator set  
with a response time not exceeding 50 milliseconds.  
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22  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Testing  
(cont’d)  
DANGER  
HAZARDOUS VOLTAGE  
(Can Cause Severe Injury or Death)  
Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.  
Emergency Service  
Procedure for Extended  
ParallelTime  
10)Re-install the transfer switch after maintenance  
with contacts closed to the same source as the  
ZTSCTTransfer Switch  
bypass switch. Reinstall the manual handle in its  
holder and the service access cover on the left  
If Source 2 breaker shunt trip was triggered after  
side of the transfer switch.  
an extended parallel time (malfunction) occurred.  
11)Re-connect the transfer switch to AUTO.*  
Follow these steps to open the transfer switch.  
b. Auto Location:  
1) Disconnect all power sources from the transfer  
switch by opening all line breakers  
(Source 1 and Source 2).  
Removal of the closed transition transfer switch if  
Source 1 and Source 2 contacts remain open.  
2) Open the cabinet door and turn the disconnect  
switch to the INHIBIT position.  
3) Remove the service access cover on the left hand  
side of the transfer switch.  
4) The manual operator and the manual handle will  
now be exposed. Insert the handle into the  
Source 2 side operator. Open the Source 2  
side contacts.  
1) Close the bypass switch into the available source.*  
2) Turn the DS to INHIBIT. Remove the transfer  
switch service access cover. Close the transfer  
switch into the same source as the bypass switch.  
(Incorrect sequencing is prevented by the  
interlocks while the transfer switch is in AUTO only.)  
3) Remove the transfer switch from the bypass-  
isolation transfer switch to inspect and repair.*  
5) Close the cabinet door.  
6) Energize Source 1 to supply the load until  
further repairs can be done.  
c. Test Location:  
Removal of the closed transition transfer switch if  
both Source 1 and Source 2 contacts remain open.  
ZBTSCTTransfer/Bypass Switch  
1) Close the bypass switch contacts (BN) as  
indicated on the bypass instruction label  
on the cabinet door.  
2) Disconnect all power sources from bypass-isolation  
closed transition transfer switch.  
a. Auto Location:  
Removal of closed transition transfer switch after  
Source 2 breaker shunt trip.  
1) Disconnect all power sources from bypass-  
isolation transfer switch.  
3) Open bottom cabinet door. Turn the Disconnect  
Switch (DS) to the INHIBIT position.  
4) Remove the service access cover on the left side  
of the transfer switch.  
5) The manual operator and the manual handle will  
not be exposed. Insert the handle into the Source 1  
side and close the Source 1 contacts.  
6) Close the bottom cabinet door.  
7) Energize Source 1 power.  
8) Remove the automatic transfer switch from the  
bypass-isolation transfer switch.*  
9) Re-install the transfer switch after maintenance  
with contacts closed to the same source as the  
bypass switch. Reinstall the manual handle in  
its holder and the service access cover on the  
left side of the transfer switch.  
2) Open the bottom cabinet door and turn the  
Disconnect Switch (DS) to the INHIBIT position.  
3) Remove the service access cover on  
the left hand side of the transfer switch.  
4) The manual operator and the manual handle will  
now be exposed. Insert the handle into the  
Source 2 side manual operator. Open the  
Source 2 side contacts.  
5) Close bottom cabinet door.  
6) Energize Source 1 power.  
7) Close the bypass contacts (BN).*  
8) Isolate the transfer switch.*  
9) Remove the transfer switch from the bypass-  
isolation transfer switch as indicated on the  
bypass instruction label to inspect and repair.  
10)Re-connect the transfer switch to AUTO.*  
* As described in the Sequence of Operation section located in the ZTSCT/ZBTSCT Series Manual (71R-5000)  
■
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GE Zenith Controls  
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Sequence of Operation  
StandardTransition  
DelayedTransition  
Source 1 Power Failure:  
Source 1 Power Failure:  
When Source 1 voltage or frequency has fallen below  
the preset "Fail" values, the controller initiates the Time  
Delay Source 2 Start Timer (Engine Start Timer "P")  
cycle. Upon completion of the (P) time delay, an  
Engine start Signal is sent to Source 2. When Source 2  
voltage and frequency reach the preset "Restore" Values,  
the time delay to Source 2 Timer (W) begins its timing  
cycle to ensure voltage and frequency stabilization  
before transfer. A manual pushbutton BYPASS is provid-  
ed to bypass the "W" time delay if desired. After the (W)  
time delay, the CCE relay energizes the CE solenoid to  
close the transfer switch in to Source 2. The SE limit  
switch activates to de-energize the CCE relay.  
When Source 1 voltage or frequency has fallen below  
the preset "Fail" values, the controller initiates the  
Time Delay Source 2 Start (Engine Start Timer "P")  
cycle. Upon completion of the (P) time delay, an  
Engine start Signal is sent to Source 2. When Source 2  
voltage and frequency reach the preset "Restore" values,  
the time delay to open Source 1 timer (W) begins its  
timing cycle to ensure voltage and frequency stabiliza-  
tion before re-transfer. A manual pushbutton BYPASS is  
provided to bypass the "W" time delay if desired. After  
the (W) time delay, the CCNO relay energizes the CNO  
solenoid to open the transfer switch out of Source 1  
position. The time delay to Source 2 timer (DW) begins  
its timing cycle. After the (DW) time delay, the CCE  
relay energizes. The switch then completes transfer to  
Source 2 by energizing the CE solenoid. The SE limit  
switch activates to de-energize the CCE relay.  
Restoration of Source 1 Power:  
When Source 1 power reach the preset "Restore" values,  
the controller initiates re-transfer to Source  
1sequence.The delay to Source 1 Timer (T) begins its  
timing cycle to ensure voltage and frequency stabiliza-  
tion before retransfer. A manual pushbutton BYPASS is  
provided to bypass the "T" time delay if desired. After  
the (T) time delay, the CCN relay energizes the CN  
solenoid to retransfer the switch to Source 1. The SN  
limit switch activates to de-energize the CCN relay.  
Restoration of Source 1 Power:  
When Source 1 power reach the preset "Restore" values,  
the controller initiates re-transfer to Source 1  
sequence.The delay to open Source 2 Timer (T) begins  
its timing cycle to ensure voltage and frequency stabi-  
lization before retransfer. A manual pushbutton BYPASS  
is provided to bypass the "T" time delay if desired. After  
the (T) time delay, the CCEO relay energizes the CEO  
solenoid to open the switch out of Source 2 position.  
The time delay to Source 1 timer (DT) begins its timing  
cycle. After the (DT) time delay, the CCN relay ener-  
gizes the CN solenoid to complete re-transfer of the  
switch to Source 1. The SN limit switch activates to de-  
energize the CCN relay.  
Immediately after re-transfer, the S2 Stop Delay Timer  
(Delay to Engine Stop "U") begins its cycle to allow  
Source 2 Engine to run unloaded. A manual pushbut-  
ton BYPASS is provided to bypass the "U" time delay if  
desired. Upon completion of the (U) timing cycle, the  
controller sends an Engine stop signal.  
Immediately after re-transfer, the S2 Stop Delay Timer  
(Delay to Engine Stop "U") begins its cycle to allow  
Source 2 Engine to run unloaded. A manual pushbut-  
ton BYPASS is provided to bypass the "U" time delay if  
desired. Upon completion of the (U) timing cycle, the  
controller sends an Engine stop signal.  
Table 3  
Timer Designations as they appear in the SET menu  
ATS Type  
P
W
DW  
T
DT  
U
Standard  
Transition  
Time Delay  
S2 Start  
Time Delay  
S2 Stable  
Time Delay  
S1 Stable  
S2 Stop  
Delay  
Delay/ Open  
Transition  
Time Delay  
S2 Start  
Time Delay  
S2 Stable  
ATS Open  
Time to S2  
Time Delay  
S1 Stable  
ATS Open  
Time to S1  
S2 Stop  
Delay  
Source 1  
Fails  
Transfer to Source 2  
Transfer to Source 1  
Engine  
Cooldown  
Source 1  
Returns  
■
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24  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Sequence of Operation  
(cont’d)  
ClosedTransition  
The ATS defaults to an open transition transfer when  
Source 1 fails. Closed transition transfer is not possible  
with only one source available. If the optional Transition  
Mode Selector (TMS) is available, one can select an  
Open Transition Transfer or a Closed Transition  
Transfer when both Sources are available..  
GE Zenith Closed Transition Transfer Switches are  
designed to Transfer the Load between two available  
sources with out interrupting power to the Load  
(Make-Before-Break). Paralleling of the two sources  
occurs within a predefined window of synchronization  
and lasts less than 100 milliseconds. The initial Source  
is then disconnected.  
If while in Closed Transition Mode, the ATS fails to  
open the source it is attempting to "transfer out of"  
within 100 milliseconds, an Alarm will sound and the  
source that the ATS just closed into will be opened  
leaving the ATS in its initial source while disabling all  
other transfer operations until the problem is corrected  
and the "Fail to Open Lockout Reset" has been pressed.  
Initiating a Closed Transition  
When a Test is initiated, the controller initiates the  
Time Delay Source 2 Start (Engine Start Timer "P")  
cycle. Upon completion of the (P) time delay, an  
Engine start Signal is sent to Source 2. When Source 2  
voltage and frequency reach the preset "Restore" values,  
the time delay to open Source 1 timer (W) begins its  
timing cycle. After the (W) time delay, the ATS closes  
into Source 2 only after the controller ensures the  
proper phase relationship between the two Sources.  
After the ATS closes into Source 2, the SE limit switch  
becomes activated to de-energize the CCE relay and  
energize the CCNO relay which opens the ATS out of  
Source 1. The SNO limit switch activates to de-energize  
the CCNO relay. The ATS has now closed into Source 2  
position without interrupting the load.  
A signal will be provided (STE) to Shunt Trip the  
Generator Circuit Breaker if the Transfer Switch  
remains closed into both Sources for more than 325  
milliseconds. The load will then be fed by the Source 1.  
The maximum time that the two Sources would be  
parallel, under these conditions, is less than 500  
milliseconds. Before operating the Closed Transition  
Transfer Switch, the condition must be corrected and  
the Shunt Trip reset. Refer to procedure for servicing  
the Switch after Shunt Tripping occures.  
Re-Transfer with Closed Transition  
The unit is Factory set to accomplish transfer within  
5 electrical degrees.  
Requires an Isochronous Governor with an operating  
frequency of 60+/- 0.2 Hz.  
Requires a Shunt Trip Breaker on the Generator set  
with a response time not exceeding 50 milliseconds.  
Deactivating the Test Switch initiates the re-transfer.  
When Source 1 voltage and frequency reach the preset  
"Restore" values, the time delay to open Source 2 timer  
(T) begins its timing cycle. After the (T) time delay, the  
ATS closes into Source 1 only after the controller  
ensures the proper phase relationship between the two  
Sources. After the ATS closes into Source1, the SN limit  
switch becomes activated to de-energize the CCN relay  
and energize the CCEO relay which opens the ATS out  
of Source 2. The SEO limit switch activates to de-ener-  
gize the CCEO relay. The ATS has now closed back into  
Source 1 position without interrupting the load.  
■
■
GE Zenith Controls  
25  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Relay/Transformer (R/T Box)  
StandardTransition  
the MX250 from the line voltage, further protecting  
Each MX250 microprocessor based ATS controller  
requires a relay/transformer box to apply line voltage to  
the ATS operator via coil control relays. Also required is  
power for the MX150 printed circuit board and an appli-  
cation of sensing voltage proportional to line voltage.  
This is accomplished by the relay transformer box. This  
method of switching operator voltage and applying power  
and sensing voltage to the printed circuit board isolates  
the controller from harmful line transients. Two versions  
of the R/T box exist depending on the type of ATS  
(standard transition or delayed transition).  
The following layout drawings of the R/T Box compo-  
nents (standard and delayed transition) include a bill of  
materials for replacement parts. Schematics are included  
to indicate proper wiring.  
PRI.  
PRI.  
1
PRI.  
SEC.  
SEC.  
SEC.  
1
2
3
2
(inside)  
3
Figure 12  
Figure 13  
40-3000 Amp - All Other StandardTypes  
40-225 Amp Molded Power Section  
Transformer Usage (see Figure 13)  
Transformer Usage (see Figure 12)  
R/T Box  
Assembly  
Part No.  
Primary  
Voltage  
at 50/60 Hz  
1 VA  
XFMR  
Part No.  
25 VA  
XFMR  
Part No.  
R/T Box  
Assembly  
Part No.  
Primary  
Voltage  
at 50/60 Hz  
1 VA  
XFMR  
Part No.  
25 VA  
XFMR  
Part No.  
50P-1026  
50P-1027  
50P-1028  
50P-1029  
50P-1030  
50P-1031  
50P-1032  
50P-1033  
120V  
K-3216  
K-3217  
K-3218  
K-3219  
K-3220  
K-3221  
K-3222  
K-3223  
K-3224  
K-3225  
K-3226  
K-3227  
K-3228  
K-3229  
K-3230  
K-3231  
57P-1015  
57P-1016  
57P-1017  
57P-1018  
57P-1019  
57P-1020  
57P-1021  
57P-1022  
120V  
K-3216  
K-3217  
K-3218  
K-3219  
K-3220  
K-3221  
K-3222  
K-3223  
K-3224  
K-3225  
K-3226  
K-3227  
K-3228  
K-3229  
K-3230  
K-3231  
208-220V  
230-240V  
277V  
380-400V  
416-440V  
460-480V  
575-600V  
208-220V  
230-240V  
277V  
380-400V  
416-440V  
460-480V  
575-600V  
Bill of Material  
Bill of Material  
Item  
Part No.  
Description  
Qty  
2
Item  
Part No.  
Description  
Qty  
2
1
2
3
See Chart  
See Chart  
K-1274  
Transformer (1 VA)  
Transformer (25 VA)  
Relay Flange Mounted  
1
2
3
See Chart  
See Chart  
K-1260  
Transformer (25 VA)  
Transformer (1 VA)  
Coil Control Relay (24V)  
2
2
2
2
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26  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Relay/Transformer (R/T Box)  
(cont’d)  
Delayed / Closed Transition  
PRI.  
SEC.  
1
2
3
Figure 14  
Transformer Usage  
Bill of Material  
Item  
Part No.  
Description  
Qty  
2
R/T Box  
Assembly  
Part No.  
Primary  
Voltage  
1 VA  
XFMR  
25 VA  
XFMR  
1
2
3
See Chart  
See Chart  
K-1260  
Transformer (25 VA)  
Transformer (1 VA)  
Coil Control Relay (24V)  
at 50/60 Hz  
Part No.  
Part No.  
2
50P-1034  
50P-1035  
50P-1036  
50P-1037  
50P-1038  
50P-1039  
50P-1040  
50P-1041  
120V  
K-3216  
K-3217  
K-3218  
K-3219  
K-3220  
K-3221  
K-3222  
K-3223  
K-3224  
K-3225  
K-3226  
K-3227  
K-3228  
K-3229  
K-3230  
K-3231  
4
208-220V  
230-240V  
277V  
380-400V  
416-440V  
460-480V  
575-600V  
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GE Zenith Controls  
27  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Relay/Transformer (R/T Box)  
(cont’d)  
StandardTransition R/T Box Schematic  
30 31  
32  
20 21 22  
XN1 - SOURCE 1 CONTROLTRANSFORMER  
XN2 - SOURCE 1 3 PHASE SENSINGTRANSFORMER  
XE1 - SOURCE 2 CONTROLTRANSFORMER  
XE2 - SOURCE 2 3 PHASE SENSINGTRANSFORMER  
XE2  
10V  
XE1  
10V  
XN2  
10V  
XN1  
10V  
24V  
11V  
24V  
11V  
SOURCE 2 24V OUTPUT  
SOURCE 1 24V OUTPUT  
3 PHASE SOURCE 2 SENSING  
900  
800  
907  
(18)  
(BLANK)  
(BLANK)  
GROUND  
CCN  
CCE  
GND  
901  
801  
CCE - COIL CONTROL RELAY (SOURCE 2)  
CCN - COIL CONTROL RELAY (SOURCE 1)  
COMMON  
902  
903  
904  
803  
804  
807  
806  
805  
906  
905  
SINGLE PHASE SOURCE 2 SENSING  
3-PHASE SOURCE 1 SENSING  
SOURCE 1 CONTROL POWER  
SOURCE 2 CONTROL POWER  
(1)  
J5  
Figure 15  
Delayed / ClosedTransition R/T Box Schematic  
22  
31  
32  
21  
30  
20  
XN1 - SOURCE1 CONTROLTRANSFORMER  
XN2 - SOURCE1 3 PHASE SENSINGTRANSFORMER  
XE1 - SOURCE 2 CONTROLTRANSFORMER  
XE2 - SOURCE 2 3 PHASE SENSINGTRANSFORMER  
XE1  
10V  
XN1  
10V  
XE2  
10V  
XN2  
10V  
24V  
24V  
11V  
11V  
900  
800  
907  
SOURCE 2 24V OUTPUT  
SOURCE 1 24V OUTPUT  
3 PHASE SOURCE 2 SENSING  
(18)  
808  
908  
GND  
901  
801  
902  
903  
904  
803  
804  
807  
806  
805  
906  
905  
CCEO - COIL CONTROL RELAY (OPEN SOURCE 2)  
CCNO - COIL CONTROL RELAY (OPEN SOURCE 1)  
GROUND  
CCEO  
CCN  
CCNO  
CCE  
CCE - COIL CONTROL RELAY (SOURCE 2)  
CCN - COIL CONTROL RELAY (SOURCE 1)  
COMMON  
SINGLE PHASE SOURCE 2 SENSING  
3-PHASE SOURCE 1 SENSING  
SOURCE 1 CONTROL POWER  
SOURCE 2 CONTROL POWER  
(1)  
J5  
Figure 16  
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28  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Troubleshooting and Diagnostics  
DANGER  
HAZARDOUS VOLTAGES CAN CAUSE SEVERE INJURY OR DEATH.  
These charts may indicate problems that require authorized GE Zenith service personnel.  
Hazardous voltages may exist on termination plugs other than those that go into the Entelli-Switch 250.  
GeneralTroubleshooting  
The following troubleshooting guide is used to recognize,  
and determine basic faults. When using this guide, it will  
ask several questions about the condition of the switch.  
This guide will then list an order of the possible faults.  
You will then look at the first suspected fault to determine  
if it is the problem. If it is not a fault, you go to the  
second suspected fault. If you go through all of the  
suspected faults, or the chart instructs you to, call  
a GE Zenith Representative for further assistance.  
NOTE: When you use the troubleshooting charts,  
the Annunciation column refers to the LED’s on  
the control panel.  
Symptom  
Annunciation  
Possible Cause(s)  
Corrective Action  
Engine does not START  
SOURCE 2  
AVAILABLE  
LED off  
Engine start wires not  
terminated properly  
Check engine start connections  
Generator is in OFF position  
Investigate why Engine Control  
Switch was turned off  
Engine does not stop  
LCD Display -  
U timing cycle not complete  
Check U timer setting  
“TD Engine Cool Down”  
SOURCE 1 POSITION, and  
SOURCE 1 and SOURCE 2  
AVAILABLE LEDs on,  
Engine start wires not  
terminated correctly  
Check Engine Start Connections  
Place generator in AUTO  
Generator in MANUAL  
but U timer has timed out  
ATS will not transfer  
to SOURCE 2  
SOURCE 2 AVAILABLE  
LED off  
SOURCE 2 voltage or frequency  
not within acceptable parameters  
Check: Engine Start Connections,  
Generator Breaker, Generator Output,  
and Engine Control Switch  
ZTG Series  
None  
Power supply connector unplugged Plug in connector  
LCD Display -  
W timing cycle not complete  
Check WTimer setting  
“S1 _ _ _ _ TD XFR S1>S2  
Time Remaining _ _ _ _”  
ATS will not transfer  
to SOURCE 1  
DW timing cycle not complete  
Check DWTimer setting  
LCD Display -  
“ATS Open  
Time Remaining _ _ _ _”  
ZTGD Series  
Check utility and utility breakers  
SOURCE 1 voltage or frequency  
not within acceptable parameters  
SOURCE 1 AVAILABLE  
LED off  
None  
Power supply connector unplugged Plug in connector  
LCD Display -  
“Diagnostic Code 001”  
Limit switch or RT box  
connector unplugged  
CallTechnical Services  
LCD Display -  
“S1 OK  
Time Remaining _ _ _ _  
Bypass”  
T timing cycle not complete  
Check TTimer setting  
LCD Display -  
TD timing cycle not complete  
Check DTTimer setting  
“ATS Open  
Time Remaining _ _ _ _”  
Table 4  
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GE Zenith Controls  
29  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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Maintenance andTesting  
CDT battery replacement - lithium batteries may  
CAUTION  
Due to hazardous voltage and current, GE Zenith rec-  
ommends that a GE Zenith Certified technician or a  
qualified electrician must perform the  
last up to 10 years, however it is recommended  
that battery replacement be included in a 3-5 year  
service cycle. The battery maintains the exerceser  
memory only and does not otherwise affect the  
operation.  
installation and maintenance of the switch.  
WARNING  
Both power sources must be disconnected  
Testing  
A manual operator handle is provided with the  
transfer switch for maintenance purposes only.  
Manual operation of the switch must be checked  
before it is operated electrically. Both power sources  
must be disconnected before manual operation  
of the switch. Insert the handle and operate the  
transfer switch between the Source 1 and Source 2  
positions. The transfer switch should operate smoothly  
without binding. Return the switch to Source 1  
position, remove the handle, and return it to  
the holder provided.  
before manual operation of the switch.  
A preventive maintenance program will insure high  
reliability and long life for the transfer switch. The  
preventive maintenance program for the transfer  
switch should include the following items:  
Inspection and Cleaning  
The switch should be inspected for any accumulation  
of dust, dirt, or moisture, and should be cleaned by  
vacuuming or wiping with a dry cloth or soft brush.  
do not use a blower since debris may become lodged  
in the electrical and mechanical components and  
cause damage.  
After completing the inspection, cleaning and servicing  
of the transfer switch, reinstall the switch cover,  
and close and lock the cabinet door. Reclose the  
circuit breakers feeding the utility and generator  
sources to the switch.  
Remove the transfer switch barriers and check the  
condition of the contacts. Any surface deposits must  
be removed with a clean cloth (do not use emery  
cloth or a file). If the contacts are pitted or worn  
excessively, they should be replaced. A general  
inspection of mechanical integrity should be made  
to include loose, broken or badly worn parts.  
Initiate the electrical transfer test by activating the  
TS test switch. P timer will time out and the micro-  
controller will send an engine start signal. When  
the W time has elapsed, the switch will complete  
its transfer by closing into Source 2.  
Deactivating the test switch will start retransfer to  
Source 1. The switch will complete its retransfer  
to Source 1 after the time delay of the T timer.  
The U engine overrun timer allows the engine  
generator to run unloaded for a preset cool  
down period.  
Servicing  
All worn or inoperative parts must be replaced  
using GE Zenith recommended replacement parts.  
Please refer to the Replacement Parts manual for  
specific part information and ordering procedures.  
Please contact the GE Zenith Technical Services  
Department for the Replacement Parts manual.  
NOTE:  
A periodic test of the transfer switch  
under load conditions is recommended  
to insure proper operation. (See National  
Electric Code articles 700 and 701).  
The operating mechanism of the transfer switch  
is lubricated with Lubriplate 105. The lubricant  
applied at the factory provides adequate lubrication for  
the lifetime of the switch. Should debris contaminate  
the mechanism, clean and apply additional Lubriplate.  
WARNING  
When performing a hi-pot or dielectric test  
on the power section, DISCONNECT the  
control panel plugs from the microprocessor  
to avoid potential damage.  
GE Zenith can provide complete preventative main-  
tenance services. Please contact the GE Zenith Technical  
Services Department for additional information.  
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30  
GE Zenith Controls  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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■
GE Zenith Controls  
31  
Entelli-Switch 250 Operation and Maintenance Manual (71R-2000)  
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GE Zenith Controls  
g
A Product of GE Industrial Systems  
General Electric Company  
830 West 40th Street, Chicago, IL 60609 USA  
773 299-6600, Fax: 773 247-7805  
www.geindustrial.com  
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