Related Manuals for Toshiba JK 720
Summary of Contents for Toshiba JK 720
- Page 1 Document: VF010H02 Rev. 6 INSTRUCTION MANUAL INSTALLATION – OPERATION – MAINTENANCE JK Series 720 Ampere Medium Voltage Controllers Issued: 4/20...
- Page 2 Basic Installation and Operation Guide JK Series 720 Series Controllers...
- Page 3 The sales contract contains the entire obligation of Toshiba International Corporation. The warranty contained in the contract between the parties is the sole warranty of Toshiba International Corporation and any statements contained herein do not create new warranties or modify the existing warranty.
- Page 4 This manual provides information on how to safely install, operate, maintain, and dispose of your JK controller/starter. The information provided in this manual is applicable to the JK 720 only. This manual provides information on the various features and functions of this device, including: •...
- Page 5 JK Series 720 Controllers Contacting TIC’s Customer Support Center Toshiba International Corporation’s Customer Support Center can be contacted to obtain help in resolving any system problem that you may experience or to provide application information. The Support Center is open from 8 a.m. to 5 p.m. (CST), Monday through Friday. The Center’s toll free number is US (800) 231-1412/Fax (713) 937-9349 CAN (800) 872-2192 MEX 01 (800) 527-1204.
- Page 6 The word CAUTION proceeded by the safety alert symbol indicates that a potentially hazardous situation exists that, if not avoided or if instructions are not followed precisely, may result in minor or moderate injury. CAUTION The word NOTE provides helpful information. NOTE TOSHIBA...
- Page 7 DO NOT remove or cover any of these labels. If the labels are damaged or if additional labels are required, contact the Toshiba Customer Support Center. Labels attached to the equipment are there to provide useful information or to indicate an imminently hazardous situation that may result in serious injury, severe property and equipment damage, or loss of life if safe procedures or methods are not followed as outlined in this manual.
- Page 8 • Carefully unpack the equipment and check for parts that may have been damaged during shipping, missing parts, or concealed damage. If any discrepancies are discovered, it should be noted with the carrier prior to accepting the shipment, if possible. File a claim with the carrier if necessary and immediately notify your Toshiba Customer Support Center.
- Page 9 Basic Installation and Operation Guide JK Series 720 Controllers TOSHIBA...
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Page 10: Table Of Contents
Vacuum Contactor Interlock ................19 Interlocks - Electrical ..................... 20 Control Power Interlock (CPI)................20 Test Power Interlock (TPI) ................. 20 Low Voltage Compartment ......................21 Main Bus Compartment ......................22 Contactor Ratings ........................23 Controller Ratings ........................24 Horsepower Table ........................25 TOSHIBA... - Page 11 Control Power/Potential Transformers ..................32 MAINTENANCE AFTER A FAULT CONDITION ................33 Enclosure ..........................33 Isolation Switch ......................... 33 Fuse Mounting .......................... 33 Terminals and Internal Conductors ................... 33 Overload Relay ......................... 33 Vacuum Contactor ........................33 Return to Service ........................33 TOSHIBA...
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Page 12: Receiving, Handling/Moving, And Unpacking
If the controller is not upright upon receipt, notify the carrier of possible damage. Upright the units as soon as possible and immediately notify the nearest Toshiba representative. • Carefully unpack the unit and make an immediate inspection for any concealed damage which might have occurred during shipment. -
Page 13: Overhead Lifting
Preferably, the controller should be stored in a heated building, with adequate air circulation and protected from dirt and water. Equipment should be stored where it is not subject to mechanical damage, especially Fig. 4 Storage TOSHIBA... -
Page 14: Outdoor Equipment
A minimum of 48 inches working space should be allowed in front of the controller. This minimum should be increased if necessary to accommodate movement around open enclosure doors to comply with applicable codes. TOSHIBA... -
Page 15: Service Conditions
Fig. 5 Typical Space Heater Service Conditions Toshiba medium voltage controllers are intended for usual service conditions as defined by NEMA. The equipment should not be exposed to corrosive or explosive fumes, dusts, vapors, dripping or standing water, abnormal vibration, shock, tilting, or other abnormal operation conditions. The temperature of the ambient air surrounding the controller should be between the limits of 0°C (32°F) and +40°C (104°F). -
Page 16: Mounting
Each section contains a vertical ground bus extending from the main ground bus or ground pad to each controller compartment. Fig. 8 Main Ground Bus TOSHIBA... - Page 17 The controller frame and any ground bus should be grounded by means of equipment grounding conductors having a size in accordance with NEC 250 and run with the main supply conductors or by bonding to the raceway enclosing the main supply conductors in accordance with NEC 250. TOSHIBA...
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Page 18: Medium Voltage Power Connections
Fig. 9 through Fig. 12. All access covers, barriers, Bus - Bus partitions, etc., that are temporarily removed during 3/8 - 16 Bus - Glastic Ins. installation must be replaced. Bus - Porcelain Ins. 5/16 - 18 M 12 Fig. 10b Torque Specs for Bus Connections TOSHIBA... - Page 19 Remove part number identification or any label on the splice bus before installation. Tighten and torque the bolts for all bus splice connections and other bus if loosened during installation of the bus splice. Fig. 12 Main Bus Splice Connections - 2000A (Consult Factory For 3000A Main Bus Splice) TOSHIBA...
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Page 20: Incoming Line
After installation, torque hardware to 45 lb-ft. After installation, check to see that at least three inches of clearance is maintained between live parts of opposite polarity and between live parts and ground. Fig. 14 Controller Load Wiring - Bottom Entry TOSHIBA... -
Page 21: Pre-Energization Check
Fig. 16 Check Connections A supply of spare parts, fuses, etc. should be established. Instruction manuals and diagrams should be collected and filed. TOSHIBA... -
Page 22: Wiring Check
A circuit transformer must not be operated with its secondary windings open. Changes made to circuit diagrams during installation should be recorded. Fig. 18 Removing Current Transformer Shorting Jumpers TOSHIBA... -
Page 23: Device/Mechanism Checks
Power circuit fuses were selected and installed in accordance with the application requirements. Confirm the proper fuses were provided. The fuses must be completely inserted in their holders. Instructions on removing and installing the fuses can be found in this manual on page 29. TOSHIBA... -
Page 24: Electrical Checks
High potential test should be performed only by WARNING qualified personnel. Refer to safety instructions provided with the test equipment. All devices must be set to their normal or OFF position before energizing incoming power. TOSHIBA... -
Page 25: General Description
Basic Installation and Operation Guide JK Series 720 Controllers GENERAL DESCRIPTION Toshiba JK 720 ampere medium voltage controllers are AC general-purpose NEMA Class E2 controllers designed for applications at utilization voltages ranging from 2.3 through 6.6 kV. They are normally used to control motor loads, although other types of loads such as variable frequency drives (VFDs), transformers and capacitors are possible. -
Page 26: Controller Compartment
The switch is also provided with lock-out provisions (Fig. 24). The isolation switch has a maximum interrupting capacity of 0.4 amperes. Do not connect additional load to the isolation WARNING switch. Fig. 24 Isolation Switch Lockout TOSHIBA... -
Page 27: Vacuum Contactor
JK Series 720 Controllers B. Vacuum Contactor The Type HCV-6KAU vacuum contactor (Fig. 25) used in Toshiba JK 720 ampere controllers is a compact, fix-mounted device. It is mounted to the floor of the controller compartment, beneath the isolation switch. -
Page 28: Control Power/Potential Transformers
Fig. 27 Control Power Transformer An electrical interlock is provided to ensure that all load is disconnected from the control power transformer secondary winding before the power isolation switch can be opened or closed. Fig. 28 Optional 2 Transformer TOSHIBA... -
Page 29: Operating Handle
Fig. 29 Operating Handle F. Interlocks - Mechanical a. Door Interlock A mechanical interlock is provided to prevent opening or closing the medium voltage compartment door unless the switch operating handle is off (Fig. 30). Fig. 30 Door Interlock TOSHIBA... -
Page 30: Handle Interlock
The interlock shown in Fig. 32 provides this function. If the switch handle is in an intermediate position, and a closing signal is given to the contactor, it is mechanically prevented from operating. Fig. 32 Handle Interlock to Vacuum Contactor TOSHIBA... -
Page 31: Interlocks - Electrical
Plugging the extension cord into a conventional outlet provides 120VAC power for performing control circuit operational tests while the medium voltage circuit is de-energized. The CPI(s) prevent the high voltage back feeding on the CPT (PT) primary. Fig. 34 Test Power Receptacle TOSHIBA... -
Page 32: Low Voltage Compartment
A horizontal low voltage wireway is provided at the lower front of the low voltage compartment. At each end of the horizontal wireway there is an opening for inter-cubicle control wiring. TOSHIBA... -
Page 33: Main Bus Compartment
The ground bus also provides a termination point for grounding the enclosure and for connecting the ground wires from shielded cable terminators. Fig. 36b Main Bus (3000A) Compartment Fig. 37 Bus Splice Links TOSHIBA... -
Page 34: Contactor Ratings
60% or less of Coil Rating DC (Cold) Tripping Current 4.8A Peak @ 125Vdc A latched contactor is the same as magnetically-held type, except number of auxiliary contacts is reduced to 2 N.O. - 2 N.C. Standard operating voltage is 120Vac Close/125Vdc Trip. TOSHIBA... -
Page 35: Controller Ratings
1 Minute Withstand Amperes) 200@2.3kV 50,000 RMS 350@4.0kV 60 kV BIL 10,800 A @2.3-6.6kV 4320 A 22 kVac 400A4.6kV (7.2kV Max) 570@6.6kV Table 3 Continuous Current Rating Enclosure Type Max. Continuous Amperes One-High Controller NEMA-1 Ventilated NEMA-1 Non-Ventilated NEMA-12, 3R TOSHIBA... -
Page 36: Horsepower Table
2750 3000 2750 5000 5500 5000 C.F. 6300 2500 2750 2500 4500 5000 4500 C.F. 6000 * - Motor FLA depends on manufacturer, speed, and other factors which must be considered. C.F. – Consult factory with your application requirements. TOSHIBA... -
Page 37: Operation
OFF and ON positions in a single continuous smooth movement (Fig. 39). After all disconnect devices have been closed, contactors may be operated to turn on loads such as motors, transformers, variable frequency drives, etc. Fig. 39 Closing Isolation Switch TOSHIBA... -
Page 38: Maintenance
PRE-ENERGIZATION CHECK section of this manual before restoring power. The following pages detail maintenance procedures recommended for Toshiba JK 720 ampere medium voltage controllers. In general, the following items should be included on the maintenance checklist: Cleaning... -
Page 39: General Inspection
Thoroughly dry any insulation which shows signs of wetness and repeat the dielectric test procedure given in the PRE-ENERGIZATION CHECK. Replace insulators, if necessary. Check for any signs of rusted or corroded parts. Check for free movement of all moving parts and mechanisms. Lubricate, if necessary, with Toshiba B9 grease. WARNING Grease is conductive. -
Page 40: Power Fuses
JK Series 720 Controllers Power Fuses The power fuses supplied in Toshiba JK 720 ampere controllers are of the bolt-in or clamp-in type, therefore overheating due to loss of fuse clip pressure is not a problem. The tightness of the fuse clamping bolts (Fig. -
Page 41: Isolation Switch
Lubricate the moving parts of the handle mechanism and, if necessary, apply a light coat of Toshiba B9 grease to the inside contact surfaces of the switch blades. Contact the equipment supplier or the factory to obtain B9, grease if required. -
Page 42: Switch Handle Mechanism
OFF and ON. Operate the contactor on test power and check that there is no binding and that the contactor is able to reach its full travel in both directions. The moving joints of all linkages should be occasionally lubricated with a light coat of Toshiba B9 grease. TOSHIBA... -
Page 43: Interlocks
Refer to the GENERAL DESCRIPTION section for the location of the handle mechanical interlocks and the CPI electrical interlock. Fig. 48 Interlock Sequence Check Control Power/Potential Transformers Wipe off the surface of the transformers (Fig. 49). Check the condition of the primary fuses and fuse clips. Check all screws for tightness. Fig. 49 Inspect Transformer(s) TOSHIBA... -
Page 44: Maintenance After A Fault Condition
Operate the vacuum contactor electrically from test power and observe that it opens and closes freely. If the vacuum bottles show any sign of binding, they should be replaced. Contact your Toshiba representative. Check for any sign of arcing damage to the insulated housing. - Page 46 Motors and Drives Division Power Apparatus & Components 13131 West Little York Road | Houston, TX 77041 Tel: 713-466-0277 | US: 800-231-1412 | CAN: 800-872-2192 www.toshiba.com/tic Printed in USA...