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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 WARNING user directions that are contained in this Instruction Manual. To contact Toshiba, address all correspondence to: Field Service Department Toshiba International Corporation 13131 West Little Y
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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 DANGER property damage if you do not follow instructions. Means that you might be seriously injured or killed if you do not follow WARNING instructions. Severe property damage might also occur. Means th
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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, deenergize, clear, ground, lockout and tag circuits in accordance with established
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SAFETY Page 3 HAZARDOUS VOLTAGE will cause severe injury, death, fire, explosion and DANGER property damage. • 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 ....................
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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 Table 4. Ratings – Motor Operation HV6AS-MU and HV6AS-MU Types ........................
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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 revi
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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 typ
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Page 8 GENERAL DESCRIPTION 5) Operations Counter - Indicates the total SAFETY DEVICES accumulated number of times the circuit breaker has been closed. 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 occu
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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
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Page 10 RECEIVING, INSPECTION AND HANDLING HANDLING AND MOVING . When handling and moving the circuit breaker, Fig. 6 Correct Method for Handling the U and the techniques shown in this section may be used. 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. Refer to Fig. 6 and Fig. 7 for the correct methods of lifting and moving the circuit breakers. MU Ty
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INSTALLATION Page 11 Do not install this at the installation location, a space heater should WARNING be installed inside the circuit breaker enclosure. equipment in areas where unusual service conditions NOTE: Temperature, altitude or other exist. Using this equipment conditions outside of the usual limits in other than usual service may require derating or other special conditions can result in equipment. Contact your nearest equipment failure. Toshiba representative for additional informat
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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 are given in Fig. 12. One cutout size is used for all breaker types. To mount the circuit breaker, follow the steps below: 1. Loosen the small screw (M5) on the closing h
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INSTALLATION Page 13 0.343 DIA 4 PLACES 0.25 0.38 RADIUS 4 PLACES 8.03 0.25 0.25 0.25 10.71 Dimensions in Inches Fig. 12 Panel Cutout Dimensions
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Page 14 INSTALLATION Fig. 13 Mounting Breaker to Flat Plate or MOUNTING DIRECTLY TO A SHELF Angles The shelf should be flat and level within ± 0.5 PANEL mm ( ± 0.02 in.). If there are any noticeable gaps between the breaker and the shelf, fill them in using flat washers as spacers. 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 flat plate (Fig. 13). Use M8 hex head bolts (either 50
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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 r
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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 c
