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Toshiba HV6FS-MLD manual

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Table of contents for the manual

  • Page 1

    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 CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net[...]

  • Page 2

    CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net[...]

  • Page 3

    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) 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 direction[...]

  • Page 4

    CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net[...]

  • Page 5

    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 that will result in death, serious injury, and severe property damage if you do not follow instructions. Means that yo[...]

  • Page 6

    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 [...]

  • Page 7

    SAFETY Page 3 HAZARDOUS VOLTAGE will cause severe injury, death, fire, explosion and 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 DANGER CTi Automation - Phone: 80[...]

  • Page 8

    Page 4 TABLE OF CONTENTS SAFETY ............................................................................................................................... ..................... 1 INTRODUCTION ............................................................................................................................... ....... 6 GENERAL DESCRIP[...]

  • Page 9

    TABLE OF CONTENTS Page 5 STORAGE ............................................................................................................................... ............... 34 Storage....................................................................................................................... ................. 34 Inspection During Stor[...]

  • Page 10

    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 eq[...]

  • Page 11

    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 ph[...]

  • Page 12

    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. Never defeat, modify or bypass any safety devices, interlocks or operating mechanism. This would make the equipment unsafe. Fire, explosion, severe injury, death and [...]

  • Page 13

    GENERAL DESCRIPTION Page 9 INDICATORS AND CONTROLS (Fig. 4) 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) Cl[...]

  • Page 14

    Page 10 RECEIVING, INSPECTION AND HANDLING RECEIVING AND UNPACKING The circuit breaker units are subjected to factory production testing prior to being packed and shipped. ACCEPTANCE INSPECTION Confirm that the circuit breaker and cell units are complete, correct as specified and undamaged from shipment and handling. Upon receipt of the equipment, [...]

  • Page 15

    RECEIVING, INSPECTION AND HANDLING Page 11 HANDLING AND MOVING When handling and moving the circuit breaker and cell, the techniques shown in this section may be used. Care and caution should be used when handling the circuit breaker and cell units to avoid damage to the equipment and personal injury. Always keep the equipment in a generally uprigh[...]

  • Page 16

    Page 12 INSTALLATION Do not install this equipment in areas where unusual service conditions exist. Using this equipment in other than usual service conditions can result in equipment failure. Toshiba HV6FS-MLD circuit breakers are intended for use in usual service conditions as defined in IEEE C37.20.2. The temperature of the cooling air (ambient [...]

  • Page 17

    INSTALLATION Page 13 MOUNTING THE CIRCUIT BREAKER CELL The circuit breaker cell is designed to mount to the floor or shelf of the installation compartment. The floor or shelf to which the cell is mounted should be flat and level within ± 0.5 mm ( ± 0.02 in.). If there are any noticeable gaps between the cell base and the mounting surface, fill th[...]

  • Page 18

    Page 14 INSTALLATION GROUND CONNECTIONS The circuit breaker cell must be grounded in accordance with the requirements of the National Electrical Code, Article 250 or applicable local standards. Proper grounding connections must be made to the circuit breaker cell before incoming power is applied. It is very important that the circuit breaker and it[...]

  • Page 19

    INSTALLATION Page 15 CONTROL CIRCUIT CONNECTIONS Control circuit wiring is connected to the circuit breaker by means of a control plug (green color) located on the breaker front panel (Fig. 15) . A control wire harness (F i g. 1 6) is furnished with the circuit breaker for making this connection. Using the supplied harness, connect control wiring i[...]

  • Page 20

    Page 16 INSTALLATION PLACING THE CIRCUIT BREAKER IN THE CELL Ha zard of fire, explosion, severe injury, death and property damage. Circuit breaker must be OFF before installation or removal from cell. Circuit breaker contains powerful springs. Discharge springs completely before installation or servicing. Before attempting to install the circuit br[...]

  • Page 21

    INSTALLATION Page 17 PLACING THE CIRCUIT BREAKER IN THE CELL (cont’d) Grasp the handles on the breaker with both hands and, while lifting the interlock release lever with the left hand, insert the breaker into the c el l ( Fig. 19 . Continue to roll the breaker into the cell until the arrow on the front cover indicates the DISCONNECTED position ([...]

  • Page 22

    Page 18 PRE-ENERGIZATION CHECK GENERAL BEFORE ENERGIZING THE CIRCUIT BREAKER for the first time, follow the procedure below to verify that the equipment is properly installed and functional. Hazardous Voltage. Turn off and lock out all primary and control circuit power sources prior to performing this pre-energization check. Do not operate this equ[...]

  • Page 23

    OPERATION Page 19 MOVING THE CIRCUIT BREAKER FROM THE DISCONNECTED TO THE CONNECTED POSITION Hazard of fire, explosion, severe injury, death and property damage. Circuit breaker must be OFF before moving to or from the CONNECTED position. Do not move the circuit breaker to the CONNECTED position without first connecting the secondary control circui[...]

  • Page 24

    Page 20 OPERATION MOVING THE CIRCUIT BREAKER FROM THE CONNECTED TO THE DISCONNECTED POSITION Hazard of fire, explosion, severe injury, death and property damage. Circuit breaker must be OFF before moving to or from the CONNECTED position. TO MOVE THE CIRCUIT BREAKER TO THE DISCONNECTED POSITION: 1. Check to be sure that the On-Off Indicator reads O[...]

  • Page 25

    PRE-ENERGIZATION CHECK Page 21 MANUAL OPERATION Powerful springs. Do not 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). MANUAL CLOSING: 1. Check to make sure that t[...]

  • Page 26

    Page 22 OPERATION MANUAL OPENING: 1. Push the trip lever in the direction of the arrow (Fig. 27). 2. The On-Off indicator changes to OFF (green). ELECTRICAL OPERATION The flow chart shown in Fig . 30 illustrates the sequence of electrical operation. Refer to the schematic shown in Fi g. 31 for determining external control circuit connections to the[...]

  • Page 27

    OPERATION Page 23 Fig. 30 Electrical Operation Flow Chart Circuit Breaker Open Control Power Applied Motor Begins Operating Closing Springs Begin Charging Closing Springs Charged Motor Stops Closing Signal Given Close Coil Energized Circuit Breaker Closes Auxiliary Relay Closes Anti-Pumping Circuit Completed Opening Signal Given Trip Coil Energized[...]

  • Page 28

    Page 24 MAINTENANCE Fig. 31 125 VDC Control Circuit Schematic SYMBOL DESCRIPTION M Motor TC Voltage Trip Coil CC Close coil UV Undervoltage Trip Coil a1 to a3 Auxiliary Contacts (N.O.) b1 to b3 Auxiliary Contacts (N.C.) X Control Relay X-a Control Relay Contact (N.O.) X-b Control Relay Contact (N.C.) Y Auxiliary Relay Y-b Auxiliary Relay Contact (N[...]

  • Page 29

    MAINTENANCE Page 25 MAINTENANCE PROGRAM 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[...]

  • Page 30

    Page 26 MAINTENANCE RECOMMENDED INSPECTION AND MAINTENANCE TYPES NOTE: Refer to the SAFETY section of this manual for important information. 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, I[...]

  • Page 31

    MAINTENANCE Page 27 Table 2 Check Points for Periodic Inspection Check Point Check Item Check Method Criteria Disposition Operating Mechanism Loose bolts, nuts or screws Tighten using screwdriver or wrench. Make sure all bolts, nuts and screws are tight. Tighten if loose. See Table 1 for tightening torques. Dust or foreign matter inside Visual insp[...]

  • Page 32

    Page 28 MAINTENANCE Table 2. Check Points for Inspection (cont’d) Check Point Check Item Check Method Criteria What to do Auxiliary Switch Terminals loose or disconnected Visual inspection. Tighten using a screwdriver. Make sure terminals are not loose or disconnected. Repair if disconnected. Tighten if loose. See Table 1 for tightening torques. [...]

  • Page 33

    MAINTENANCE Page 29 VACUUM CHECK 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 gene[...]

  • Page 34

    Page 30 MAINTENANCE CRITERIA: 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. 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 [...]

  • Page 35

    DISPOSAL Page 31 DISPOSAL Contact your state environmental agency for details on disposal of electrical components and packaging in your particular area. CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net[...]

  • Page 36

    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 break[...]

  • Page 37

    SPECIFICATIONS Page 33 Table 3 Circuit Breaker Ratings – Motor Stored Energy Operation HV6FS-MLD Type Rated Voltage kV, rms 7.2 4.8 AC Withstand Voltage kV, rms 22 – 1 Min. Basic Impulse Level kV 60 Maximum Continuous Current A, rms 630 Rated Frequency Hz 50/60 Rated Interrupting Current (0.15 P.F.) kA (Sym.), rms 14 16 Rated Making Current kA [...]

  • Page 38

    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 EIGHT EEN (18) MONTHS AFTER THE DATE ON WHICH SUCH EQUIPMENT AND PAR TS (EXCLUDING REPAIRED OR REPLACEMENT EQUIP[...]