Toshiba HV6FS-MLD User Manual

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Document: GF07Z304 Rev. 2

INSTRUCTION MANUAL

INSTALLATION - OPERATION - MAINTENANCE

HV6FS-MLD Vacuum Circuit Breakers – Drawout Type

4.8 & 7.2kV Voltage Classes
(Fast Closing w/UV Release)

Issued: 10/2006

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INSTRUCTION MANUAL

For the Installation, Operation and Maintenance of

HV6FS-MLD Vacuum Circuit Breakers – Drawout Type

4.8 & 7.2kV Voltage Classes
(Fast Closing w/UV Release)

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:
[phone]

[phone]
[phone] (Canada)

Fax: [phone]
Please complete the following information for your records and retain with this manual:
Model: ___________________________________
Serial Number: _____________________________
Date of Installation: _________________________
Inspected by: ______________________________
Reference Number: _________________________

Never attempt to install, operate, maintain or dispose of this equipment until
you have first read and understood all of the relevant product warnings and
user directions that are contained in this Instruction Manual.

© TOSHIBA INTERNATIONAL CORPORATION, 2006

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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.

DANGER

WARNING

CAUTION

NOTE Gives you helpful information

Note: The contents of this manual will not become apart of or modify the warranty policy. The
terms of which are set forth at the end of this manual.

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 that 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.

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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) 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, de-energize, 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 HV6FS 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

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

property damage.

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Page 4 TABLE OF CONTENTS

SAFETY....................................................................................................................................................1

INTRODUCTION ......................................................................................................................................6

GENERAL DESCRIPTION.......................................................................................................................7

Components..................................................................................................................................7

Safety Devices..............................................................................................................................8

Indicators and Controls.................................................................................................................8

RECEIVING, INSPECTION AND HANDLING........................................................................................10

Receiving and Unpacking ...........................................................................................................10

Acceptance Inspection................................................................................................................10

Handling and Moving ..................................................................................................................11

INSTALLATION......................................................................................................................................12

Rating Verification.......................................................................................................................12

Mounting the Circuit Breaker Cell ...............................................................................................12

Main Circuit Cable Connections..................................................................................................13

Ground Connections...................................................................................................................14

Control Circuit Connections ........................................................................................................15

Placing the Circuit Breaker in the Cell.........................................................................................16

PRE-ENERGIZATION CHECK ..............................................................................................................18

General .......................................................................................................................................18

Electrical Checks ........................................................................................................................18

OPERATION...........................................................................................................................................19

Moving Circuit Breaker From Disconnected to Connected Position ...........................................19

Moving the Circuit Breaker From Connected to Disconnected Position .....................................20

Manual Operation........................................................................................................................21

Electrical Operation & Undervoltage Trip....................................................................................22

Electrical Operation Flow Chart ..................................................................................................23

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

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TABLE OF CONTENTS Page 5

STORAGE..............................................................................................................................................34

Storage........................................................................................................................................34

Inspection During Storage...........................................................................................................34

SPECIFICATIONS..................................................................................................................................35

Table 3. Ratings – Motor Operation HV6FS-MLD Type.............................................................35

WARRANTY AND LIMITATION OF LIABILITY.....................................................................................36

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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 HV6FS-MLD vacuum circuit
breaker described in this manual is suitable for
use on systems of 4.8kV and 7.2kV voltage
classes that require interrupting ratings of 16kA
and 14kA respectively and a continuous current
rating of 630A. The circuit breaker is intended
for use in limited applications requiring small
physical size and low maintenance.

This breaker is designed for drawout operation
using the H6A-HLS cell. The H6A-HLS cell
allows the circuit breaker to be withdrawn for
service without requiring manual disconnection
of line, load and control wiring.

The circuit breaker is a motor-operated type.
The motor is used to charge the closing springs
and to close the breaker upon command. The
circuit breaker can be tripped electrically.

Arc interruption is accomplished inside sealed
vacuum interrupters mounted on track-resistant
insulators. Vacuum interrupters use low-surge
contact materials that exhibit low current
chopping levels reducing switching overvoltages.

Fig. 1 and Fig. 2 illustrate and identify the major
components of the circuit breaker and cell.

COMPONENTS LEGEND:
Circuit Breaker (Fig. 1):

1) Manual charging handle

2) Manual trip lever

3) On-Off indicator

4) Spring charge indicator

5) Operations counter

6) Secondary control circuit plug

7) Interlock release lever

8) Primary stab fingers

9) Manual close lever (Not shown in Figure)
Cell (Fig. 2):

1) Breaker guide rails

2) Main terminal shutter

3) Breaker holding pin

Fig. 1 Type HV6FS-MLD Circuit Breaker

Fig. 2 Type H6A-HLS Circuit Breaker Cell

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Page 8 GENERAL DESCRIPTION

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.

DANGER

WARNING

INTERLOCK RELEASE LEVER
The interlock release lever on the front of the

circuit breaker (Fig. 3) prevents moving the
circuit breaker to or from the CONNECTED
position while it is ON (main contacts closed).

If the circuit breaker is ON, the interlock release
lever cannot be raised, preventing movement of
the breaker in or out of the cell. If the lever is
raised when the circuit breaker is OFF, an
interlock prevents the circuit breaker from closing
until the lever is returned to its lowered position.

DANGER

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.

Hazard of fire, explosion,
severe injury, death and
property damage.

Never attempt to move a
circuit breaker that is ON
(main contacts closed) into
or out of the CONNECTED
position.

Never attempt to forcibly
override the interlock
release lever.

Fig. 3 Interlock Release Lever