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POWER DISTRIBUTION
JK Series
400A & 720A
Fixed Type
Medium Voltage
Motor Controllers
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MEDIUM VOLTAGE CONTROLLERS JK400 Series The JK400 Series of motor controller is the result Isolated Low Voltage Compartment of extensive research and development. This The low voltage section is oversized and is at a state-of-the-art controller was designed in convenient height. This section is isolated from Houston, Texas, and is currently being manufac- the medium voltage section and includes: tured under ISO 9001 standards in the same Thermal Overload Protection Relay manufacturing facili
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MEDIUM VOLTAGE CONTROLLERS JK400 Series Toshiba's JK400 series complies with EEMAC, NEMA, UL and CSA standards and is available in non-reversing and reversing full voltage, autotrans- former, reactor, multi-speed, synchronous and wound rotor configurations. Latched contactors are also available. The JK400 series is available in the following enclosed ratings: 360 amps 2300-6600 Volts Up to 5,000 HP Current Rating Maximum Maximum Continuous Amperes* Maximum Continuous Continuous
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MEDIUM VOLTAGE CONTROLLERS JK720 Series The new JK720 Series of motor controller is the Isolated Low Voltage Compartment result of extensive research and development. The low voltage section is oversized and is at a This state-of-the-art controller was designed in convenient height. This section is isolated from Houston, Texas, and is currently being manufac- the medium voltage section and includes: tured under ISO 9001 standards in the same Thermal Overload Protection Relay manufacturing fac
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MEDIUM VOLTAGE CONTROLLERS JK720 Series Toshiba's JK720 series complies with EEMAC, NEMA, UL and CSA standards and is available in non-reversing and reversing full voltage, autotrans- former, reactor, multi-speed, synchronous and wound rotor configurations. Latched contactors are also available. The JK720 series is available in the following enclosed ratings: 720 amps 2300-4800 Volts Up to 6,000 HP Note: An Incoming Section is required for the JK720 FVNR, FVR and RVAT type start
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JK Series Product Specification 400A MEDIUM VOLTAGE FIXED CONTROLLER 1. Standards 1.1 Basic controller shall comply with NEMA ICS3-1993, Part 2 (ICS2-324) and UL 347 Standards. Basic controller can be UL Listed and CSA Certified. 2. Structure 2.1 Dimensions FVNR One-high - 30"W x 36"D x 46"H (no bus, small LV compartment) FVNR One-high - 30"W x 36"D x 61"H (bus provision, large LV compartment) FVNR One-high - 30"W x 36"D x 90"H (bus provision, empty upper MV compartment) FVNR Two-high - 30"W x
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2.4 Handling and Installation 2.4.1 Removable angles or eye bolts shall be provided at the top of the structure for lifting. 3. Power Bus 3.1 Horizontal power bus shall be located at the center rear of the cubicle, in the same location as other JK Series controllers. 3.2 Horizontal power bus ratings of 1200 and 2000 amperes are available. Bus sizes shall match those provided in other JK Series controllers. 3.3 Horizontal power bus shall be braced for 50kA RMS symmetrical. 3.4 Horizontal power
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4.2 Bolted Pressure Isolation Switch 4.2.1 A Toshiba type JK fixed mounted, gang-operated isolation switch shall be provided with each controller to isolate the medium voltage compartment from the power source. 4.2.2 The switch shall be directly driven by an externally operable handle mounted on the right hand flange of the cubicle. The handle shall provide positive indication of the position of the switch. 4.2.3 The switch mechanism shall be designed such that in the closed position it prov
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4.3.3 Power connections from the isolation switch to the main power fuses shall be made using bus bar. Connections from the contactor through the current transformers to the outgoing load terminals shall be made using power cable furnished by others. 4.3.4 The contactor shall be available with an optional mechanical latch with provisions for manual or electrical trip. 4.3.5 The contactor shall be mechanically and electrically interlocked with the isolation switch as described in the section
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5. Ratings 5.1 Controller shall be rated as follows: 5.1.1 Interrupting Ratings: 400 Ampere Controller: - contactor 7.0kA @ 6.9kV - fused controller 50kA RMS Sym. @ 7.2kV 200MVA @ 2.3kV 350MVA @ 4.0kV 400MVA @ 4.6kV 570MVA @ 6.6kV 5.1.2 Continuous Thermal Ratings: 400 Ampere Controller: Enclosure type Max. Continuous Max. Continuous Max. Continuous Amperes Amperes Amperes 90” One-high controller or Upper controller in a 46” and 61” One-high Lower controller in a Two- Two-high stacking controll
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JK Series Product Specification 720A MEDIUM VOLTAGE FIXED CONTROLLER 1. Standards 1.1 Basic controller shall comply with NEMA ICS3-1993, Part 2 (ICS2-324) and UL 347 Standards. Basic controller can be UL/CUL Listed. 2. Structure 2.1 Dimensions Across-the-Line (one-high) - 36"W x 36"D x 90"H Reduced Voltage Autotransformer - (2) 36"W x 36"D x 90"H 2.2 Fabrication 2.2.1 11 gauge frame with 16 gauge side, back and top sheets. 2.2.2 Front of cubicle to be an all-welded assembly. Remainder of f
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2.4.1 Removable angles or eye bolts shall be provided at the top of the structure for lifting. 2.4.2 Optional removable sill channels shall be available. 3. Power Bus 3.1 Horizontal power bus shall be located at the center rear of the cubicle, in the same location as other JK Series controllers. 3.2 Horizontal power bus ratings of 1200 and 2000 amperes shall be available. Bus sizes shall match those provided in other JK Series controllers. 3.3 Horizontal power bus shall be braced for 50kA RMS
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4.2 Bolted Pressure Isolation Switch 4.2.1 A fixed mounted, gang-operated isolation switch shall be provided with each controller to isolate the medium voltage compartment from the power source. 4.2.2 The switch shall be directly driven by an externally operable handle mounted on the right hand flange of the cubicle. The handle shall provide positive indication of the position of the switch. 4.2.3 The switch mechanism shall be designed such that in the closed position it provides the equival
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4.3.3 Power connections from the isolation switch to the contactor shall be made using bus bar. Connections from the contactor through the current transformers to the outgoing load terminals shall be made using power cable. 4.3.4 The contactor shall be supplied with an optional mechanical latch with provisions for manual or electrical trip. 4.3.5 The contactor shall be fully mechanically and electrically interlocked with the isolation switch as described in the section on interlocking (4.5).
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4.5.7 An electrical interlock shall be provided to ensure the isolation switch does not open with the control power transformer under load. This interlock shall be designed such that during switch opening, the transformer secondary is disconnected prior to the opening of the switch blades. Also, during switch closing, the switch blades must close before the secondary load is reconnected. 4.5.8 An electrical interlock shall be provided to prevent the vacuum contactor from being closed using e
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