Toshiba HV6AS User Manual
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.
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
WARNING
To contact Toshiba, address all correspondence to:
Field Service Department
Toshiba International Corporation
13131 West Little York Road
Houston, Texas 77041 USA
you have first read and understood all of the relevent product warnings and
user directions that are contained in this Instruction Manual.
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
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.
DANGER
WARNING
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.
Indicates a situation which will result in death, serious injury, and severe
property damage if you do not follow instructions.
Means that you might be seriously injured or killed if you do not follow
instructions. Severe property damage might also occur.
Means that you might be injured if you do not follow instructions. Equipment
damage might also occur.
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) Carefully read the entire instruction manual.
2) Be skilled in the installation, construction or operation of the equipment and
aware of the hazards involved.
3) Be trained and authorized to safely energize, deenergize, clear, ground,
lockout and tag circuits in accordance with established safety practices.
4) Be trained and authorized to perform the service, maintenance or repair of
this equipment.
5) 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.
SAFETY Page 3
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
HAZARDOUS VOLTAGE will cause severe injury, death, fire, explosion and
property damage.
SAFETY.................................................................................................................................................... 1
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
TABLE OF CONTENTS Page 5
Inspection During Storage...........................................................................................................32
SPECIFICATIONS..................................................................................................................................33
Table 3. Ratings – Manual Operation HV6AS-U and HV6AS-L Types ...................................... 33
Table 4. Ratings – Motor Operation HV6AS-MU and HV6AS-MU Types .................................. 33
WARRANTY AND LIMITATION OF LIABILITY.....................................................................................34
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.
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
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.
Main Circuit Terminals)
Fig. 1 and Fig. 2 illustrate and identify the major
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)
Page 8 GENERAL DESCRIPTION
5) Operations Counter - Indicates the total
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.
accumulated number of times the circuit
breaker has been closed.
DANGER
WARNING
INDICATORS AND CONTROLS (Fig. 3)
The following front panel indicators and controls
are provided:
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).
Never defeat, modify or
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
covers and panels are in
place.
Fig. 3 Indicators and Controls
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