Document: GF07Z301 Rev. 1
INSTRUCTION MANUAL
INSTALLATION - OPERATION - MAINTENANCE
HV6AS Vacuum Circuit Breakers – Fixed Type
4.8 & 7.2kV Voltage Classes
APPLICABLE MODEL NUMBERS:
(Manual Operation Types)
HV6AS-U
HV6AS-L
(Motor Operation Types)
HV6AS-MU
HV6AS-ML
Issued: 2/2000
Supercedes First Issue Dated 2/99.
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INSTRUCTION MANUAL
For the Installation, Operation and Maintenance of
HV6AS Vacuum Circuit Breakers – Fixed Type
4.8 & 7.2kV Voltage Classes
Never attempt to install, operate, maintain or dispose of this equipment until
you have first read and understood all of the relevent product warnings and
user directions that are contained in this Instruction Manual.
WARNING
To contact Toshiba, address all correspondence to:
Field Service Department
Toshiba International Corporation
13131 West Little York Road
Houston, Texas 77041 USA
or call:
(713) 466-0277
(800) 231-1412
(800) 527-1204 (Canada)
Fax:
(713) 466-8773
Please complete the following information for your records and retain with this manual:
Model: ___________________________________
Serial Number:_____________________________
Date of Installation:_________________________
Inspected by: ______________________________
Reference Number: _________________________
© TOSHIBA INTERNATIONAL CORPORATION, 2000
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SAFETY
Page 1
IMPORTANT MESSAGES
Read this manual and follow its instructions. Signal words such as
DANGER, WARNING and CAUTION will be followed by important safety
information that must be carefully reviewed.
Indicates a situation which will result in death, serious injury, and severe
property damage if you do not follow instructions.
DANGER
Means that you might be seriously injured or killed if you do not follow
instructions. Severe property damage might also occur.
WARNING
Means that you might be injured if you do not follow instructions. Equipment
damage might also occur.
CAUTION
NOTE
Gives you helpful information
READ SAFETY SIGNS
To avoid injury, you must read and follow all safety signs.
Keep the safety signs visible and in good shape. Never remove or cover any safety
signs.
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Page 2
SAFETY
QUALIFIED OPERATORS ONLY
Only qualified persons are to install, operate, or service this equipment according to all
applicable codes and established safety practices.
A qualified person must:
1)
2)
Carefully read the entire instruction manual.
Be skilled in the installation, construction or operation of the equipment and
aware of the hazards involved.
3)
4)
5)
Be trained and authorized to safely energize, deenergize, clear, ground,
lockout and tag circuits in accordance with established safety practices.
Be trained and authorized to perform the service, maintenance or repair of
this equipment.
Be trained in the proper care and use of protective equipment such as rubber
gloves, hard hat, safety glasses, face shield, flash clothing, etc. in
accordance with established practices.
6)
Be trained in rendering first aid.
SAFETY CODES
Toshiba HV6AS vacuum circuit breakers are designed and built in accordance with JIS
C 4603-1990 and JEC-2300-1985. Installations must comply with all applicable state
and local codes, adhere to all applicable National Electric Code (NFPA 70) standards
and instructions provided in this manual.
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SAFETY
Page 3
HAZARDOUS VOLTAGE will cause severe injury, death, fire, explosion and
property damage.
DANGER
•
•
•
•
Turn off and lock out Primary and Control Circuit Power before servicing.
Keep all panels and covers securely in place.
Never Defeat, Modify, or Bypass any Safety Interlocks
Qualified Operators only
SAFETY....................................................................................................................................................1
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Page 4
TABLE OF CONTENTS
INTRODUCTION ......................................................................................................................................6
GENERAL DESCRIPTION.......................................................................................................................7
Components..................................................................................................................................7
Indicators and Controls.................................................................................................................8
RECEIVING, INSPECTION AND HANDLING..........................................................................................9
Receiving and Unpacking .............................................................................................................9
Acceptance Inspection..................................................................................................................9
Handling and Moving ..................................................................................................................10
INSTALLATION......................................................................................................................................11
Rating Verification.......................................................................................................................11
Mounting the Circuit Breaker to a Panel .....................................................................................12
Mounting Directly to a Shelf ........................................................................................................14
Main Circuit Cable Connections..................................................................................................15
Ground Connections ...................................................................................................................16
Control Circuit Connections ........................................................................................................17
Additional Auxiliary Switch ..........................................................................................................17
PRE-ENERGIZATION CHECK ..............................................................................................................18
General .......................................................................................................................................18
Electrical Checks ........................................................................................................................18
OPERATION...........................................................................................................................................19
Manual Operation........................................................................................................................19
Electrical Operation.....................................................................................................................19
Undervoltage Trip........................................................................................................................24
MAINTENANCE .....................................................................................................................................25
Maintenance Program.................................................................................................................25
Maintenance Record...................................................................................................................25
Servicing Equipment ...................................................................................................................25
Inspection and Maintenance Types ............................................................................................26
Table 1. Tightening Torques......................................................................................................26
Table 2. Check Points for Periodic Inspection ...........................................................................27
Vacuum Check............................................................................................................................29
DISPOSAL..............................................................................................................................................31
STORAGE ..............................................................................................................................................32
Storage........................................................................................................................................32
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TABLE OF CONTENTS
Page 5
Inspection During Storage...........................................................................................................32
SPECIFICATIONS..................................................................................................................................33
Table 3. Ratings – Manual Operation HV6AS-U and HV6AS-L Types......................................33
WARRANTY AND LIMITATION OF LIABILITY.....................................................................................34
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Page 6
INTRODUCTION
It is the intent of this manual to provide a guide for safely installing, operating and maintaining Toshiba
vacuum circuit breakers. This manual consists of a section of general safety instructions and is marked
throughout with warning symbols. Read this manual thoroughly before installation, operation and
maintenance of this equipment.
This manual and all accompanying drawings should be considered a permanent part of the equipment.
They should be readily available for review and reference at all times. This manual is not intended to
cover all details, combinations, or variations of the equipment. Always refer to drawings accompanying
the equipment for additional details.
All safety warnings must be followed to ensure personal safety. General safety instructions are
found on pages 1 through 3. Read and save these instructions for future reference.
Follow all precautions to attain proper equipment performance and longevity.
Dimensions shown in the manual are in metric and/or their English equivalent.
This manual is divided into major sections of interest, as follows:
GENERAL DESCRIPTION – Provides a description of the equipment, information on major
components and how they function, plus rating information.
RECEIVING, INSPECTION AND HANDLING – Describes procedures for receiving, unpacking,
inspecting, handling, lifting and moving the circuit breaker.
INSTALLATION – Provides information on installing the circuit breaker in the switchgear cell along with
breaker racking procedures.
PRE-ENERGIZATION CHECK – Provides a checklist for preparing the equipment for energization.
OPERATION – Provides information on manual and electrical operation of the circuit breaker, circuit
diagrams, operating sequence description and operation of circuit breaker optional accessories.
MAINTENANCE – Lists the basic maintenance procedures for this equipment necessary for safe and
reliable operation.
DISPOSAL – Lists procedures for the safe disposal of the equipment when the service life has expired.
STORAGE – Provides guidelines for storing new equipment for an extended period of time.
SPECIFICATIONS – Covers ratings and other specifications of the circuit breaker.
WARRANTY AND LIMITATION OF LIABILITY – Details Toshiba International Corporation’s standard
warranty terms.
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GENERAL DESCRIPTION
Page 7
The Toshiba HV6AS vacuum circuit breakers
described in this manual are suitable for use on
systems of 4.8kV and 7.2kV voltage classes
which require interrupting ratings of 16kA and
14kA respectively and a continuous current
rating of 630A. The circuit breakers are intended
for use in limited applications requiring small
physical size and low maintenance.
These breakers are designed for fixed panel
mounting and are available with upper main
circuit terminals (U, MU types) or rear terminals
(L, ML types).
The breakers are available as both manual and
motor-operated types. Motor-operated breakers
use a motor to charge the closing springs and to
close the breaker upon command. Both types
can be tripped electrically and also include
undervoltage release.
Fig. 1 U and MU Type Circuit Breaker (Upper
Main Circuit Terminals)
Arc interruption is accomplished inside sealed
vacuum interrupters mounted on track-resistant
insulators. Vacuum interrupters use low-surge
contact materials which exhibit low current
chopping levels reducing switching overvoltages.
components of the circuit breakers.
COMPONENTS LEGEND:
1) Manual closing handle
2) Manual trip lever
3) On-Off indicator
4) Spring charge indicator (MU and ML only)
5) Operations counter
6) Secondary control circuit terminal block
7) Main circuit terminals
8) Auxiliary switch
9) Grounding terminal
Fig. 2 L and ML Type Circuit Breaker (Rear
Main Circuit Terminals)
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Page 8
GENERAL DESCRIPTION
5) Operations Counter - Indicates the total
accumulated number of times the circuit
breaker has been closed.
SAFETY DEVICES
Safety interlocks and guards are provided as an
integral part of the equipment design. These
devices are provided for safety to the operator.
Never defeat, modify or
DANGER
bypass any safety devices,
interlocks or operating
mechanism. This would
make the equipment
unsafe. Fire, explosion,
severe injury, death and
property damage could
occur.
Do not operate this
equipment unless all
WARNING
covers and panels are in
place.
INDICATORS AND CONTROLS (Fig. 3)
The following front panel indicators and controls
are provided:
Fig. 3 Indicators and Controls
1) On-Off Indicator - Indicates if the circuit
breaker is OFF (Green) or ON (Red). When
the indicator reads OFF, the main contacts of
the circuit breaker are open. When the
indication is ON, the main contacts are
closed.
2) Closing Spring Status Indicator (MU, ML
types only) - Indicates if the closing springs
are CHARGED (Yellow) or DISCHARGED
(White).
3) Manual Closing Handle – Rotating the
handle clockwise approximately 75° closes
the circuit breaker (On-Off indicator changes
to ON). When the handle is released, it
returns to its normal position.
4) Manual Trip Lever (Red) – Pushing the lever
in the direction of the arrow trips the circuit
breaker (On-Off indicator changes to OFF).
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RECEIVING, INSPECTION AND HANDLING
Page 9
RECEIVING AND UNPACKING
Fig. 4 Closing Handle
The circuit breaker units are subjected to factory
production testing prior to being packed and
shipped.
ACCEPTANCE INSPECTION
Confirm that the circuit breaker unit is complete,
correct as specified and undamaged from
shipment and handling.
Upon receipt of the equipment, do the following:
1) Make an immediate inspection for damage
which might have occurred during shipment.
If damage is discovered, it should be noted
with the carrier prior to accepting the
shipment, if possible.
2) Carefully unpack the equipment sufficiently to
check for missing parts or concealed
damage.
3) Check for the presence of accessories that
are shipped with the circuit breaker:
Fig. 5 Insulating Cylinder
- Closing Handle (shipped loose with
3) Keep the circuit breaker upright.
Never lay the circuit
breaker on its side or
upside down. This may
cause damage.
CAUTION
4) File a claim with the carrier for any damaged
or missing items and immediately notify the
nearest Toshiba representative.
Do not install or energize
equipment that has been
damaged. Damaged
WARNING
equipment can fail during
operation, resulting in fire
and explosion.
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Page 10
RECEIVING, INSPECTION AND HANDLING
.
HANDLING AND MOVING
When handling and moving the circuit breaker,
the techniques shown in this section may be
used.
Fig. 6 Correct Method for Handling the U and
Care and caution should be used when handling
the circuit breaker units to avoid damage to the
equipment and personal injury. Always keep the
circuit breaker in a generally upright position.
methods of lifting and moving the circuit
breakers.
MU Type Circuit Breakers
Fig. 7 Correct Method for Handling the L and
ML Type Circuit Breakers
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INSTALLATION
Page 11
at the installation location, a space heater should
be installed inside the circuit breaker enclosure.
Do not install this
WARNING
equipment in areas where
unusual service conditions
exist. Using this equipment
in other than usual service
conditions can result in
equipment failure.
NOTE:
Temperature, altitude or other
conditions outside of the usual limits
may require derating or other special
equipment. Contact your nearest
Toshiba representative for additional
information.
Toshiba HV6AS circuit breakers are intended for
use in usual service conditions as defined in
IEEE C37.20.2. The temperature of the cooling
air (ambient air temperature) surrounding the
breaker should be between the limits of -5°C
(23°F) and +40°C (104°F). The altitude of the
equipment installation should not exceed 3300 ft
(1000 m).
RATING VERIFICATION
Prior to Installation, the maximum fault current
capacity of the power system at the point of
installation should be verified. This value must
not exceed the symmetrical interrupting
capability of the circuit breaker.
illustrates a typical circuit breaker nameplate.
In particular, avoid the following installation
conditions:
Do not exceed the ratings
DANGER
specified on the circuit
breaker nameplate or
system accessories.
Underrated equipment can
fail during operation
causing fire, explosion,
severe injury, death, and
property damage.
- Excessive dust
- Corrosive gases
- Extreme variations in temperature
- Very high or low humidity
- Vibrations
- Inclined locations
If there is a chance that condensation can occur
Fig. 8 Typical Circuit Breaker Nameplate
TOSHIBA
VACUUM CIRCUIT BREAKER
TYPE HV6AS-MU-VV
RATED VOLTAGE 7.2/4.8 kV, RMS SHORT CKT. AMPS
14/16 kA, RMS
FREQUENCY
50/60 Hz INTERRUPTING TIME
3 CYCLES
120 VAC / 125 VDC
125 VDC
CONTINUOUS AMPS
IMPULSE LEVEL
DIELECTRIC
CLOSE VOLTS
630A, RMS
60 kV, CREST
22 kV AC RMS
SHUNT TRIP VOLTS
UV TRIP VOLTS
MFG. STANDARD
53 lbs
120 VAC
JIS C 4603-1990
JEC-2300-1985
WEIGHT
24
kg
PARTS & WIRING, SEE INSTRUCTIONS
GF07Z301
SER. No. 98700221 MFG. DATE 7/98
TOSHIBA INTERNATIONAL CORPORATION
HOUSTON, TEXAS U.S.A.
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Page 12
INSTALLATION
Fig. 10 Align Breaker With Panel Cutout
MOUNTING THE CIRCUIT BREAKER TO A
PANEL
The circuit breakers are designed to mount to a
panel made from 11 ga. (.12 in.) thick steel. If
the breaker must be mounted to a panel of
different thickness, contact Toshiba.
Panel cutout dimensions for the circuit breakers
all breaker types.
To mount the circuit breaker, follow the steps
below:
1. Loosen the small screw (M5) on the closing
handle and remove the handle.
Fig. 11 Fasten Breaker and Front Plate to
2. Remove the four front plate mounting bolts
Remove the spacer washers between the
front plate and breaker and discard them
(make sure none are left inside the breaker),
3. Align the breaker with the cutout and
mounting holes on the panel to which it is to
furnished with two hooks which may be used
to temporarily attach the breaker to the
panel.
4. Using the four M8 bolts removed in step 2,
fasten the breaker and its front plate to the
torque should be 120-150 kgf-cm (9-11 ft-lb).
Panel
5. Replace the closing handle removed in step
1 and the M5 screw. The screw should be
tightened to a torque of 40-50 kgf-cm (35-43
in-lb).
Fig. 9 Remove Front Plate and Spacer
Washers
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Page 14
INSTALLATION
Fig. 13 Mounting Breaker to Flat Plate or
Angles
MOUNTING DIRECTLY TO A SHELF
The shelf should be flat and level within ± 0.5
mm (± 0.02 in.). If there are any noticeable gaps
between the breaker and the shelf, fill them in
using flat washers as spacers.
PANEL
Check to make sure the breaker On-Off indicator
shows OFF (green), then mount it by following
the steps below:
1. Fasten the breaker onto steel angles or to a
(either 50 mm or 35 mm). The tightening
torque should be 120-150 kgf-cm (9-11 ft-lb).
ANGLE
may be used.
M8 x 35MM OR M8 x 50MM BOLT
Fig. 14 Optional Hardware Orientation
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INSTALLATION
Page 15
Fig. 15 Pass Cable Through Insulating
MAIN CIRCUIT CABLE CONNECTIONS
Cables which connect to the circuit breaker
should be routed to avoid interference with sharp
edges and moving parts. Minimum bending
radius for the type of cable used should be
observed.
Power cables should be braced and/or laced to
withstand short-circuit forces wherever such
cables are unsupported. Power cables should
be adequately sized to carry the maximum
continuous current in accordance with NEC
requirements and should have an adequate
voltage rating. Cables should be dressed and
terminated as appropriate to the voltage class
and cable manufacturer’s recommendations.
When terminating shielded cables, use
termination kits appropriate for the system
voltage to taper the insulation and reduce
Cylinder
Fig. 16 Fasten Cable to Main Circuit
electrical stress.
Follow the manufacturer’s
installation instructions provided with the
termination kit.
To connect cables, follow the steps below:
1. Pass the cable through the insulating
cylinder (six cylinders are supplied with the
2. Fasten the cable to the main circuit terminal
hex head bolts, 2 flat washers, a lock
washer and a nut. While securely preventing
the bolt from rotating with a wrench, torque
the nut to 250-315 kgf-cm (18-23 ft-lb) for
M10 bolts or 450-565 kgf-cm (32-41 ft-lb) for
M12 bolts.
Terminal
Use two wrenches to torque
the connection to prevent
applying excessive force to
CAUTION
the terminal which can
damage the frame.
3. Fasten the insulating cylinder in place, then
check to make sure that the hook is engaged
Fig. 17 Fasten Insulating Cylinder
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Page 16
INSTALLATION
GROUND CONNECTIONS
Fig. 18 Ground Connection for U and MU
Type Breakers
The circuit breaker must be grounded in
accordance with the requirements of the National
Electrical Code, Article 250 or applicable local
standards.
Proper grounding
WARNING
connections must be made
to the circuit breaker before
incoming power is applied.
It is very important that the circuit breaker and its
enclosure be adequately grounded to protect the
operator from injury in the event of short circuits
or other abnormal occurences and to ensure that
the metal parts of the equipment, other than live
parts, remain at ground potential.
For U and MU type circuit breakers, the ground
terminal is on the left side of the operating
mechanism as viewed from the rear of the
breaker. To make the ground connection, first
remove the fastening M6 hex head bolt and
crimp-on terminal (provided with the breaker)
and crimp the terminal to the end of the ground
the same bolt previously removed and torque to
50-65 kgf-cm (43-56 in-lb).
Fig. 19 Ground Connection for L and ML
Type Breakers
For L and ML type circuit breakers, the ground
terminal is on the left side of the terminal block
as viewed from the rear of the breaker (Fig. 19).
The same instructions as for the U and MU
breaker above should be followed to attach the
ground wire.
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INSTALLATION
Page 17
Fig. 20 Connection to Control Terminal
CONTROL CIRCUIT CONNECTIONS
Control circuit wiring is connected to the terminal
block on the top of the operating mechanism
with the appropriate wiring diagram shown in Fig.
this manual.
On the U and MU type breakers, connections to
auxiliary contacts are made directly to the
On the L and ML type breakers, connections to
auxiliary contacts are made to a terminal block
Block
Fig. 21 Auxiliary Contact Connections on U
ADDITIONAL AUXILIARY SWITCH (Optional)
An optional second auxiliary switch may be
furnished, located on the right side as viewed
from the rear of the breaker.
When a second auxiliary switch is furnished,
control wires are connected directly to the
switch.
and MU Type Breakers
Fig. 22 Auxiliary Contact Connections on L
and ML Type Breakers
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Page 18
PRE-ENERGIZATION CHECK
ELECTRICAL CHECKS
GENERAL
BEFORE
Electrical shock hazard.
ENERGIZING
THE
CIRCUIT
Do not touch energized
WARNING
BREAKER for the first time, follow the procedure
below to verify that the equipment is properly
installed and functional.
components during a test
using auxiliary power.
An electrical insulation resistance test should
be performed to verify that the circuit breaker
and associated field wiring are free from
short circuits and grounds. Refer to the
MAINTENANCE Section of this manual for
additional information.
Hazardous Voltage. Turn off
DANGER
and lock out all primary and
control circuit power
sources prior to performing
this pre-energization check.
Hazardous voltages are
present during dielectric
testing which can result in
serious injury or death.
High potential tests should
be performed only by
qualified personnel.
Do not operate this
equipment until a complete
safety inspection has been
made.
WARNING
WARNING
Do not energize damaged
equipment that has not
WARNING
been repaired or verified.
The circuit breaker must be set to the OFF
position before energizing incoming power.
Do not remove, cover or
WARNING
destroy any safety signs.
Do not operate this
WARNING
equipment until all panels
and covers have been
installed.
All blocks or other temporary braces used for
shipment must be removed.
Before closing the enclosure, all metal chips,
scrap wire and other debris left over from
installation must be cleaned out.
Cover all unused openings. Install all panels,
guards and covers.
A
supply of spare parts should be
established.
Instruction manuals and diagrams should be
collected and filed.
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OPERATION
Page 19
Fig. 23 Preparing to Manually Close Breaker
MANUAL OPERATION
Powerful springs. Do not
WARNING
place your hands or any
part of your body inside
the circuit breaker while
the indicators show
CHARGED (yellow) or ON
(red).
To avoid damaging the
mechanism, do not close
the circuit breaker when
the On-Off Indicator shows
ON (red).
CAUTION
MANUAL CLOSING (Motor-Operated MU and
ML Types):
1. Check to make sure that the On-Off
indicator shows OFF (green).
2. Attach the closing handle to the breaker if it
is not already attached.
Fig. 24 Manually Closing Breaker
3. If the closing spring status indicator shows
DISCHARGED (white):
Turn the closing handle clockwise (Fig. 23).
The breaker will close (On-Off indicator
changes to ON) after the handle is turned
NOTE
If the handle is turned in small
increments, the closing spring will
store the energy from the handle
action and the circuit breaker will
close before 75° of rotation.
If the closing spring status indicator shows
CHARGED (yellow):
Turn the closing handle clockwise. The
breaker will close after the handle is turned
approximately 10°.
4. Release the handle, and it will return to its
initial position.
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Page 20
OPERATION
Fig. 25 Manually Opening Breaker
MANUAL CLOSING (Manual Spring-Operated
U and L Types):
SYMBOL
DESCRIPTION
1. Check to make sure that the On-Off
indicator shows OFF (green).
2. Turn the closing handle clockwise. The
breaker will close (On-Off indicator changes
to ON) after the handle is turned
approximately 75°.
NOTE
If the handle is turned in small
increments, the closing spring will
store the energy from the handle
action and the circuit breaker will
close before 75° of rotation.
3. Release the handle, and it will return to its
initial position.
M
TC
Motor
Voltage Trip Coil
MANUAL OPENING (All Types):
UV
Undervoltage Trip Coil
Auxiliary Contacts (N.O.)
Auxiliary Contacts (N.C.)
Control Relay
Control Relay Contact (N.O.)
Control Relay Contact (N.C.)
Auxiliary Relay
1. Push the trip lever in the direction of the
a1 to a6
b1 to b6
X
2. The On-Off indicator changes to OFF
(green).
X-a
X-b
Y
Y-a
ELECTRICAL OPERATION
Auxiliary Relay Contact (N.O.)
Auxiliary Relay Contact (N.C.)
Y-b
sequence of electrical operation of the MU and
ML type circuit breakers.
LS1 to LS3 Limit Switches
R1 to R4
REC
D
Resistors
Rectifier
Diode
determining external control circuit connections
to the circuit breaker.
C
SP
RL
GL
Capacitor
Surge Protector
Red Lamp
Green Lamp
Fig. 26 Legend for Schematics
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OPERATION
Page 21
Circuit Breaker Open
Control Power Applied
Motor Begins Operating
Closing Springs Begin Charging
Closing Springs Charged
Motor Stops
- - - - Spring Status Indicator Changes to Yellow
- - - - Standby for Close Operation
Closing Signal Given
Motor Begins Operating
Circuit Breaker Closes
Auxiliary Relay Closes
Anti-Pumping Circuit Completed
Opening Signal Given
Trip Coil Energized
- - - - Spring Status Indicator Changes to White
and On-Off Status Changes to ON
- - - - Next Close Operation is Not Possible
Unless Close Signal is Canceled
- - - - On-Off Status Indicator Changes to OFF
Circuit Breaker Opens
Fig. 27 Electrical Operation Flow Chart for MU
and ML Type Breakers
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Page 22
OPERATION
+
OFF
K
Circuit Breaker Components
Shown Inside Box
C4
15 14
13 12 11
16 15 14 13 12 11
a3 a2 a1 b3 b2 b1
a6 a5 a4 b6 b5 b4
125 VDC
SUPPLY
120 VAC
SUPPLY
UV
TC
25 24
23 22 21
26 25 24 23 22 21
Optional Auxiliary Contacts
C04
N2
RL
GL
-
K
N2 C4 C04
Terminal Layout
(As Viewed From Front of Circuit Breaker)
Fig. 28 125 VDC Control Circuit Schematic for U Type Circuit Breaker
Fig. 29 125 VDC Control Circuit Schematic for L Type Circuit Breaker
+
OFF
Circuit Breaker Components
Shown Inside Box
A2 A1
B2 B1
C4
K
16 15 14 13 12 11
a3 a2 a1 b2 b1
b6 b5 b4 a6 a5 a4
125 VDC
SUPPLY
120 VAC
SUPPLY
UV
TC
A02 A01 B02 B01
26 25 24 23 22 21
Optional Auxiliary Contacts
C04
N2
RL
GL
-
B2 B02
A1 A01 A2 A02 B1 B01
K
N2 C4 C04
Terminal Layout
(As Viewed From Front of Circuit Breaker)
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OPERATION
Page 23
+
ON
OFF
Circuit Breaker Components
Shown Inside Box
C4
PR3
H
K
15 14
13 12 11
16 15 14 13 12 11
SP
D
REC
X-a
LS2
X-a
X-b
Y-b Y-a LS1
Y-b R4
a3
a2 a1 b3 b2 b1
a6 a5 a4 b6 b5 b4
125 VDC
120 VAC
SUPPLY SUPPLY
M
R2
R3
UV
TC
LS3 LS3 R1 X-a
C
25 24
23 22 21
26 25 24 23 22 21
Optional Auxiliary Contacts
X
Y
RL
GL
(Connect Wires Directly To
Auxiliary Switch Terminals)
C04 NT3
N2
Components Inside Dashed Box Located
On Control Circuit Board
-
PR3 NT3
H
K
N2 C4 C04
Terminal Layout
(As Viewed From Front of Circuit Breaker)
+
ON
OFF
K
Circuit Breaker Components
Shown Inside Box
C4
PR3
H
D
A2 A1
B2 B1
16 15 14 13 12 11
SP
REC
X-a
LS2
X-a
X-b
Y-b Y-a LS1
Y-b R4
a3
a2 a1 b2 b1
b6 b5 b4 a6 a5 a4
125 VDC
SUPPLY SUPPLY
120 VAC
M
R2
R3
UV
TC
LS3 LS3 R1 X-a
C
A02 A01 B02 B01
26 25 24 23 22 21
Optional Auxiliary Contacts
X
Y
RL
GL
(Connect Wires Directly To
Auxiliary Switch Terminals)
C04 NT3
N2
Components Inside Dashed Box Located
On Control Circuit Board
-
PR3 NT3
H
K
N2 C4 C04
A1 A01
A2 A02 B1 B01
B2 B02
Terminal Layout
(As Viewed From Front of Circuit Breaker)
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Page 24
OPERATION
UNDERVOLTAGE TRIP
All HV6AS fixed mounted circuit breakers are
furnished with an undervoltage trip device. The
undervoltage trip device operates to trip the
circuit breaker OFF unless 120VAC control
power is present at the terminals of relay UV.
When the circuit breakers are shipped, the
undervoltage trip device is defeated by a factory-
place, the circuit breaker will operate normally
without power applied to relay UV. Removing
this plug (Fig. 33) activates the undervoltage trip
function.
Fig. 33 Removing Plug From UV Trip Device
Fig. 32 Plug Installed in UV Trip Device
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MAINTENANCE
Page 25
6) Comments
MAINTENANCE PROGRAM
The degree of detail of the record will depend
somewhat on the operating conditions.
In order to ensure continued reliable and safe
operation of the equipment, a program of
periodic maintenance must be established.
Operating and environmental conditions will
usually dictate the frequency of inspection
required. NFPA Publication 70B "Electrical
Equipment Maintenance" may be used as a
guide for setting up the maintenance program.
SERVICING EQUIPMENT
For your safety, turn off and lock out main and
control circuit power before servicing the circuit
breaker. Certain minimum safety procedures
must be followed:
1) Only qualified personnel should attempt
Contact with energized
components can cause
DANGER
this service.
severe injury, death and
property damage. Turn off
and lock-out primary and
control circuit power before
servicing.
2) Never perform service on or next to
exposed components energized with line
voltage.
Failure to adhere to these
safety procedures can
Improper maintenance can
WARNING
result in severe injury,
death and property
damage.
WARNING
WARNING
cause severe injury, death
and property damage. Only
qualified and authorized
persons are to install,
operate or service this
equipment.
Grease is conductive. Do
not allow grease or any
other substances to
contaminate insulating
materials. Contaminated
insulators can allow a
short-circuit or ground
fault to occur.
NOTE:
Refer to the SAFETY section of this
manual for important information.
MAINTENANCE RECORD
Keep a permanent record of all maintenance
work. At a minimum, this record should include
information on:
1) Items inspected
2) Reports of any testing
3) Equipment condition
4) Corrective actions or adjustments
5) Date of work
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Page 26
MAINTENANCE
RECOMMENDED INSPECTION AND
MAINTENANCE TYPES
Screw
Nominal
Dia.
Tightening Torque
NOTE:
Refer to the SAFETY section of this
manual for important information.
M4
15-20 kgf-cm
13-17 in-lb
M5
M6
30-40 kgf-cm ()
26-34 in-lb
50-65 kgf-cm ()
43-56 in-lb
120-150 kgf-cm ()
9-11 ft-lb
250-315 kgf-cm ()
18-23 ft-lb
A. Acceptance Inspection
This inspection confirms that the circuit
breaker unit is complete, correct as specified,
and undamaged from shipment. The
procedure for this inspection is outlined in the
RECEIVING, INSPECTION AND HANDLING
section of this manual.
M8
M10
M12
450-565 kgf-cm ()
32-41 ft-lb
B. Patrol Inspection
Inspection is made of the condition of the
circuit breaker while it is energized. Check
that no unusual sounds or smells exist
externally.
Inspection Frequency: Once every 6 months
C. Periodic Inspection
Inspection is performed wth the circuit
breaker de-energized. The lubrication of
sliding and rotating parts is checked and the
mechanism is lubricated if needed.
Inspection Frequency: Once every 1-3 years
or every 3000 operations (normal). Once
every 6 years (detailed).
Refer to Table 2 for the schedule of Periodic
Inspections.
D. Unscheduled Inspection
Inspections are implemented as required.
Inspection Frequency: As needed
NOTE:
The inspection frequency and points
to be inspected may vary from the
above recommendations depending
on the status of use, frequency of
switching,
amount
of
current
interrupted and other factors.
Table 1 Tightening Torques
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MAINTENANCE
Page 27
Table 2 Check Points for Periodic Inspection
Check Point
Operating
Check Item
Loose bolts,
Check Method
Criteria
Disposition
Tighten using
screwdriver or
wrench.
Make sure all bolts, nuts
and screws are tight.
Tighten if loose.
tightening torques.
Mechanism nuts or screws
Dust or foreign
matter inside
Visual
inspection.
The circuit breaker
should be clean and
contain no foreign matter.
Wipe with a clean
dry cloth.
Indicator
operation
Visual
inspection.
Make sure the number of Check the cause
operations is correctly
displayed.
and repair.
Warpage
Visual
inspection.
There should be no
warpage or missing
parts.
Check the cause
and repair.
Smooth
operation
Manual
operation.
Visual
Make sure moving parts
operate smoothly.
Apply a small
amount of
lubrication.
inspection or
touch. Check
lubrication.
Main Circuit Discoloration
due to heat
Visual
inspection.
Make sure there is no
discoloration.
Check the cause
and repair. Tighten
connections to circuit
from conducting
parts
torques.
Loose bolts,
nuts or screws
Tighten using a
wrench.
Make sure all bolts, nuts
and screws are tight.
tightening torques.
Dust on surface Visual
Make sure there is no
dust on the surface.
Wipe with a clean,
dry cloth.
of vacuum
interrupter
inspection.
Insulator
Dust, foreign
matter or
damage
Visual
inspection.
Make sure there is no
dust, foreign matter or
breakage.
Wipe with a clean,
dry cloth. If
damaged, contact
Toshiba.
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Page 28
MAINTENANCE
Table 2. Check Points for Inspection (cont’d)
Check Point
Check Item
Check Method
Criteria
What to do
Repair if
Auxiliary
Switch
Terminals loose Visual
or disconnected inspection.
Make sure terminals are
not loose or disconnected. disconnected.
Tighten if loose.
Tighten using a
screwdriver.
tightening torques.
Case/contacts
Visual
inspection.
Make sure there is no
damage or warping.
Replace if damaged
or warped.
Control
Circuits
Smooth
Energize the
control circuit.
Breaker (motor-operated
type) should charge
quickly and smoothly.
If the circuit fails to
operate, check the
cause and repair.
movement of
motor charging
mechanism
Terminals loose Visual
Make sure terminals are
Repair if
or disconnected inspection.
not loose or disconnected. disconnected.
Tighten if loose.
Tighten using a
screwdriver.
tightening torques.
Insulation
Resistance
Measure-
ment
Meaure main
circuit to ground 1000V.
Megger test at
Resistance should be
500MΩ or greater.
If the insulation
resistance is low,
wipe off the vacuum
interrupter and other
insulation surfaces
with a clean dry
cloth and then
Meaure
between main
circuit terminals
Megger test at
1000V.
Resistance should be
100MΩ or greater.
repeat the test.
Meaure control
circuits to
ground
Megger test at
500V.
Resistance should be
2MΩ or greater.
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MAINTENANCE
Page 29
Hazardous voltages are
VACUUM CHECK
present during dielectric
testing which can result in
severe injury or death.
Only qualified personnel
should conduct this testing.
WARNING
A sufficient level of vacuum is necessary for
proper performance of the vacuum interrupters.
Although vacuum leaks are rare, the vacuum
integrity should be checked periodically. The
relationship between dielectric breakdown
voltage of the contact gap and internal vacuum
interrupter pressure has been found to be
generally predictable. Therefore, vacuum
interrupter integrity is checked by performing a
high potential test across the open gap of the
interrupter.
TEST PROCEDURE:
1. The circuit breaker should be disconnected
from the main circuit and be in the OFF
position.
2. Connect all the line side primary terminals
together and to the output of the vacuum
checker or AC hi-pot machine. Connect all
the load side primary terminals together and
to the ground terminal of the vacuum checker
or AC hi-pot machine.
TEST EQUIPMENT:
Toshiba offers a compact vacuum checker (Type
CI35-1D) which enables a quick and easy check
on vacuum interrupter internal pressure.
Alternatively, any commercially available AC high
potential tester may be used which is capable of
delivering at least 25 milliamperes at 22 kV for a
period of one minute.
3. Increase the voltage from zero to 22kV AC at
a rate of approximately 2kV per second.
Hold the voltage at this value for 1 minute
and observe the current drawn by the
interrupter.
PRECAUTIONS:
4. Decrease the voltage back to zero.
Applying abnormally high voltage across a pair of
contacts in vacuum may produce X-rays. The
radiation may increase with the increase in
voltage and/or decrease in contact spacing. X-
radiation produced during this test with
recommended voltage and normal contact
spacing is extremely low and well below the
Fig. 34 Toshiba Portable Vacuum Checker
maximum permitted by standards.
As an
additional safety measure, however, it is
recommended that all personnel keep at least 1
meter (3.3 ft) away from the vacuum circuit
breaker while this test is performed.
Radiation exposure hazard.
X-rays may cause illness or
injury. Stay at least 1 meter
WARNING
(3.3 ft) away from the circuit
breaker during the vacuum
check test .
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Page 30
MAINTENANCE
CRITERIA:
Fig. 35 Application of Test Voltage for
Vacuum Check
1. If a current flow above 5 milliamperes is
observed or if breakdown occurs, one or
more of the interrupters has insufficient
vacuum and must be replaced.
1 minute
22kV AC
(31kV DC)
Exception:
If the current exceeds 5
milliamperes the first time the voltage is
brought up, reduce the voltage to zero and
increase it again. It may be necessary to
repeat this procedure a few times.
Voltage
2. If the breaker fails to meet criteria 1, then
repeat the test on each pole separately to
identify the damaged interrupter or
interrupters.
Zero
15 sec
15 sec
3. If the voltage can be held for 1 minute and
the current flow does not exceed 5
milliamperes, the interrupter has a sufficient
vacuum level.
Time
After the test is complete, discharge any residual
static charge from the primary terminals of the
circuit breaker.
If a vacuum checker or AC hi-pot tester is not
available, a DC hi potential test may be
conducted. If a DC test is conducted, the test
voltage must be increased to 31kV DC. The test
duration for DC tests and the criteria for
acceptance remain the same as for AC tests.
Do not use DC hi-pot
testers which employ
unfiltered half-wave
WARNING
rectifiers. The peak
voltages produced by these
testers may exceed the
recommended value of
31kV. This can result in the
production of harmful X-
rays and may invalidate the
test results.
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STORAGE
Page 32
STORAGE
If the circuit breaker is to be stored for any length
of time prior to installation, the following
precautions should be taken:
1) The original packing should be restored, if
possible.
2) Do not subject the equipment to moisture or
sun rays. Store in cool, clean, and dry
location.
3) Place a dust cover over the circuit breaker
packaging to protect against dirt and
moisture.
4) Store in an upright position.
INSPECTION DURING STORAGE
Routine scheduled inspection is necessary if
storage is for an extended period. The unit
should be checked for condensation, moisture,
corrosion, and vermin.
Prior to installation, the circuit breaker should be
carefully examined for evidence of physical
damage, corrosion, or other deterioration. Refer
to the PRE-ENERGIZATION Section of this
manual.
The MAINTENANCE section of this manual
describes various types of inspections
recommended for this circuit breaker during the
operation period.
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SPECIFICATIONS
Page 33
Table 3 Circuit Breaker Ratings – Manual Operation HV6AS-U and HV6AS-L Types
Rated Voltage
kV, rms
kV, rms
kV, crest
A, rms
Hz
7.2
4.8
Rated Low Frequency Withstand Voltage
Impulse Withstand Voltage
Rated Continuous Current
Rated Frequency
22
60
630
50/60
Rated Short-Circuit Breaking Current
Rated Short-Circuit Making Current
Rated Short-Time Withstand Current (2 sec)
Rated Interrupting Time (60Hz Basis)
Opening Time
kA, rms
kA, crest
kA, rms
cycles
msec
14
35
16
40
12.5
3
8 - 25
Rated Control Voltage (Opening)
Rated Control Voltage (Undervoltage Trip)
Operating Duty
V
DC 30, 125
AC 120
V
O - 1 min - CO - 3 min - CO
2 N.O. - 2 N.C.
Auxiliary Contacts
Weight
kg
22 (U Type) 25 (L Type)
Table 4 Circuit Breaker Ratings – Motor Stored Energy Operation HV6AS-MU and HV6AS-ML
Types
Rated Voltage
kV, rms
kV, rms
kV, crest
A, rms
Hz
7.2
4.8
Rated Low Frequency Withstand Voltage
Impulse Withstand Voltage
Rated Continuous Current
Rated Frequency
22
60
630
50/60
Rated Short-Circuit Breaking Current
Rated Short-Circuit Making Current
Rated Short-Time Withstand Current (2 sec)
Rated Interrupting Time (60Hz Basis)
Opening Time
kA, rms
kA, crest
kA, rms
cycles
msec
msec
sec
14
35
16
40
12.5
3
8 - 25
Closing Time
150 - 300
1.5 - 3
Charging Time
Rated Control Voltage (Closing/Charging)
Rated Control Voltage (Opening)
Rated Control Voltage (Undervoltage Trip)
Operating Duty
V
AC 120, DC 125
DC 30, 125
AC 120
V
V
O - 1 min - CO - 3 min - CO
2 N.O. - 2 N.C.
Auxiliary Contacts
Weight
kg
24 (MU Type) 27 (ML Type)
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Page 34
WARRANTY AND LIMITATION OF LIABILITY
Toshiba International Corporation ("Company") warrants that all equipment and parts described herein will be free
from defects in materials and workmanship. THIS WARRANTY WILL EXPIRE EIGHTEEN (18) MONTHS AFTER
THE DATE ON WHICH SUCH EQUIPMENT AND PARTS (EXCLUDING REPAIRED OR REPLACEMENT
EQUIPMENT AND PARTS FURNISHED PURSUANT TO THIS WARRANTY) ARE SHIPPED BY THE COMPANY
TO THE INITIAL PURCHASER OR TWELVE (12) MONTHS AFTER SUCH EQUIPMENT AND PARTS
(EXCLUDING REPAIRED OR REPLACEMENT EQUIPMENT AND PARTS FURNISHED PURSUANT TO THIS
WARRANTY) ARE FIRST PLACED IN OPERATION, WHICHEVER PERIOD FIRST EXPIRES.
The Company will, at its option, repair or replace such equipment or part which is defective under the terms of the
foregoing warranty, free of charge; provided the purchaser (1) promptly notifies the Company in writing of such
defect, and (2) furnishes the Company satisfactory proof thereof, and (3) establishes that the equipment or part has
been properly installed, maintained and operated within the limits of rated capacity and normal usage and in
accordance with this manual, and (4) if requested by the Company, returns the defective equipment or part to the
Company and pays all expenses incurred in connection with such return. The repaired or replacement equipment or
part will be delivered, free of charge, to the purchaser F.O.B. the Company's warehouse or, at the Company's option,
F.O.B. a Company authorized service shop, not loaded on truck or other carrier. The purchaser will pay the costs
applicable to the equipment or part following such delivery, including, without limitation, all handling, transportation,
assembly, insurance, testing and inspection charges.
THE FOREGOING OBLIGATION TO REPAIR OR REPLACE EQUIPMENT PARTS SHALL BE THE SOLE AND
EXCLUSIVE REMEDY OF THE PURCHASER, ITS CUSTOMERS AND USERS OF THE EQUIPMENT AND
PARTS FOR BREACH OF THE FOREGOING WARRANTY. THE COMPANY WILL HAVE NO OBLIGATIONS TO
DISASSEMBLE ANY EQUIPMENT OR PART WHICH IS DEFECTIVE WITHIN THE TERMS OF THE ABOVE
WARRANTY OR TO INSTALL ANY REPAIRED OR REPLACEMENT PART OR EQUIPMENT OR TO PAY ANY
COSTS INCURRED IN CONNECTION WITH ANY SUCH DISASSEMBLY OR INSTALLATION. THE COMPANY,
TOSHIBA CORPORATION AND THEIR SUPPLIERS AND SUBCONTRACTORS HEREBY DISCLAIM ALL
OTHER EXPRESS, STATUTORY AND IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, ALL
EQUIPMENT AND PARTS FURNISHED PURSUANT TO THE FOREGOING WARRANTY AND ALL IMPLIED
WARRANTIES OF MERCHANTABILITY.
The total liability of the Company, Toshiba Corporation and their suppliers and subcontractors for any loss, damage
or claim, whether in contact, tort (including negligence and liability without fault), or otherwise, arising out of,
connected with or resulting from the equipment and parts described in this manual or the performance or breach of
any contract for the sale or supply of such equipment and parts, or from the design, manufacture, sale, delivery,
resale, installation, technical direction or supervision of installation, inspection, testing, repair, replacement,
operation, maintenance or use of any such equipment or part or any service relating thereto furnished by the
Company shall not in any event exceed the price allocable to the equipment, part or service which gives claim, loss
or damage. In no event, whether as a breach of contract or warranty, alleged negligence, liability without fault, or
otherwise, shall the Company, Toshiba Corporation or their suppliers or subcontractors be liable for special or
consequential damages, including, without limitation, loss or profits or revenue, loss of equipment described herein
or any associated equipment, cost of capital, cost of substitute equipment or parts, facilities or services, down-time
costs, labor costs or claims of customers of the purchaser for such damages.
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TOSHIBA
TOSHIBA INTERNATIONAL CORPORATION
13131 W. Little York Road, Houston, TX 77041,
U.S.A.
Tel: (713) 466-0277Fax: (713) 466-8773
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