Toshiba HV6AS- Manuals

SAFETY Page 3 HAZARDOUS VOLTAGE will cause severe injury, death, fire, explosion andproperty 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 Operato...

Page 4 TABLE OF CONTENTS INTRODUCTION ...................................................................................................................................... 6 GENERAL DESCRIPTION ............................................................................................................

TABLE OF CONTENTS Page 5 Inspection During Storage........................................................................................................... 32 SPECIFICATIONS ...............................................................................................................................

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 markedthroughout with warning symbols. Read this manual thoroughly before i...

GENERAL DESCRIPTION Page 7 The Toshiba HV6AS vacuum circuit breakersdescribed in this manual are suitable for use onsystems of 4.8kV and 7.2kV voltage classeswhich require interrupting ratings of 16kA and14kA respectively and a continuous currentrating of 630A. The circuit breakers are intendedfor u...

Page 8 GENERAL DESCRIPTION SAFETY DEVICES Safety interlocks and guards are provided as anintegral part of the equipment design. Thesedevices are provided for safety to the operator. Never defeat, modify orbypass any safety devices,interlocks or operatingmechanism. This wouldmake the equipmentunsafe....

RECEIVING, INSPECTION AND HANDLING Page 9 RECEIVING AND UNPACKING The circuit breaker units are subjected to factoryproduction testing prior to being packed andshipped. ACCEPTANCE INSPECTION Confirm that the circuit breaker unit is complete,correct as specified and undamaged fromshipment and handlin...

Page 10 RECEIVING, INSPECTION AND HANDLING HANDLING AND MOVING When handling and moving the circuit breaker,the techniques shown in this section may beused. Care and caution should be used when handlingthe circuit breaker units to avoid damage to theequipment and personal injury. Always keep thecirc...

INSTALLATION Page 11 Do not install thisequipment in areas whereunusual service conditionsexist. Using this equipmentin other than usual serviceconditions can result inequipment failure. Toshiba HV6AS circuit breakers are intended foruse in usual service conditions as defined inIEEE C37.20.2. The te...

Page 12 INSTALLATION MOUNTING THE CIRCUIT BREAKER TO APANEL The circuit breakers are designed to mount to apanel made from 11 ga. (.12 in.) thick steel. Ifthe breaker must be mounted to a panel ofdifferent thickness, contact Toshiba. Panel cutout dimensions for the circuit breakersare given in Fig. ...

INSTALLATION Page 13 Fig. 12 Panel Cutout Dimensions 10.71 0.38 RADIUS 4 PLACES 0.343 DIA 4 PLACES 0.25 0.25 0.25 0.25 8.03 Dimensions in Inches

Page 14 INSTALLATION 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 inusing flat washers as spacers. Check to make sure the breaker On-Off indicatorshows OFF (green), then mo...

INSTALLATION Page 15 MAIN CIRCUIT CABLE CONNECTIONS Cables which connect to the circuit breakershould be routed to avoid interference with sharpedges and moving parts. Minimum bendingradius for the type of cable used should beobserved. Power cables should be braced and/or laced towithstand short-cir...

Page 16 INSTALLATION GROUND CONNECTIONS The circuit breaker must be grounded inaccordance with the requirements of the NationalElectrical Code, Article 250 or applicable localstandards. Proper groundingconnections must be madeto the circuit breaker beforeincoming power is applied. It is very importa...

INSTALLATION Page 17 CONTROL CIRCUIT CONNECTIONS Control circuit wiring is connected to the terminalblock on the top of the operating mechanism(Fig. 20). Connect control wires in accordancewith the appropriate wiring diagram shown in Fig.28 through Fig. 31 in the OPERATION section ofthis manual. On ...

Page 18 PRE-ENERGIZATION CHECK GENERAL BEFORE ENERGIZING THE CIRCUITBREAKER for the first time, follow the procedure below to verify that the equipment is properlyinstalled and functional. Hazardous Voltage. Turn offand lock out all primary andcontrol circuit powersources prior to performingthis pre...

OPERATION Page 19 MANUAL OPERATION Powerful springs. Do notplace your hands or anypart of your body insidethe circuit breaker whilethe indicators showCHARGED (yellow) or ON(red). To avoid damaging themechanism, do not closethe circuit breaker whenthe On-Off Indicator showsON (red). MANUAL CLOSING (M...

Page 20 OPERATION MANUAL CLOSING (Manual Spring-OperatedU and L Types): 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 changesto ON) after the handle is turnedapproximately 75 ° . NOTE If the handle is...

Page 24 OPERATION UNDERVOLTAGE TRIP All HV6AS fixed mounted circuit breakers arefurnished with an undervoltage trip device. Theundervoltage trip device operates to trip thecircuit breaker OFF unless 120VAC controlpower is present at the terminals of relay UV. When the circuit breakers are shipped, t...

MAINTENANCE Page 25 MAINTENANCE PROGRAM In order to ensure continued reliable and safeoperation of the equipment, a program ofperiodic maintenance must be established.Operating and environmental conditions willusually dictate the frequency of inspectionrequired. NFPA Publication 70B "ElectricalE...

Page 26 MAINTENANCE RECOMMENDED INSPECTION ANDMAINTENANCE TYPES NOTE: Refer to the SAFETY section of thismanual for important information. A. Acceptance Inspection This inspection confirms that the circuitbreaker unit is complete, correct as specified,and undamaged from shipment. Theprocedure for th...

MAINTENANCE Page 27 Table 2 Check Points for Periodic Inspection Check Point Check Item Check Method Criteria Disposition OperatingMechanism Loose bolts,nuts or screws Tighten usingscrewdriver orwrench. Make sure all bolts, nutsand screws are tight. Tighten if loose. See Table 1 fortightening torque...

Page 28 MAINTENANCE Table 2. Check Points for Inspection (cont’d) Check Point Check Item Check Method Criteria What to do AuxiliarySwitch Terminals looseor disconnected Visualinspection. Tighten using ascrewdriver. Make sure terminals arenot loose or disconnected. Repair ifdisconnected. Tighten if l...

MAINTENANCE Page 29 VACUUM CHECK A sufficient level of vacuum is necessary forproper performance of the vacuum interrupters.Although vacuum leaks are rare, the vacuumintegrity should be checked periodically. Therelationship between dielectric breakdownvoltage of the contact gap and internal vacuumin...

Page 30 MAINTENANCE CRITERIA: 1. If a current flow above 5 milliamperes is observed or if breakdown occurs, one ormore of the interrupters has insufficientvacuum and must be replaced. Exception: If the current exceeds 5 milliamperes the first time the voltage isbrought up, reduce the voltage to zero...

DISPOSAL Page 31 DISPOSAL Contact your state environmental agency fordetails on disposal of electrical components andpackaging in your particular area.

STORAGE Page 32 STORAGE If the circuit breaker is to be stored for any lengthof time prior to installation, the followingprecautions 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 drylocatio...

Page 34 WARRANTY AND LIMITATION OF LIABILITY Toshiba International Corporation ("Company") warrants that all equipment and parts described herein will be freefrom defects in materials and workmanship. THIS WARRANTY WILL EXPIRE EIGHTEEN (18) MONTHS AFTERTHE DATE ON WHICH SUCH EQUIPMENT AND PA...

TOSHIBA TOSHIBA INTERNATIONAL CORPORATION 13131 W. Little York Road, Houston, TX 77041,U.S.A.Tel: (713) 466-0277 Fax: (713) 466-8773