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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 starters, transformer
feeders and capacitor switching controllers.
Current Rating
Enclosure Type
Type 1 Ventilated
Type 1 Non-Ventilated
Type 12 & 3R
* Actual limits based on your specific application parameters.
All specifications subject to change without notice.
Short Circuit & Withstand Capability
Interrupting
Interrupting
Capacity
Capacity
(Symmetrical
(Symmetrical
Amperes)
MVA)
200 @ 2.3 kV
50,000
350 @ 4.0 kV
@ 2.3 - 4.6 kV
400 @ 4.6 kV
Application Table
Maximum Horsepower at Utilization Voltage
Enclosed
2300 Volts, 3 Phase
Maximum
Continuous
Synchronous
Current
Motors
(Amperes)
0.8 PF 1.0 PF
720
3000
650
2750
600
2500
For transformer and capacitor load switching applications, consult factory.
Maximum Continuous
Amperes*
One-High Controller
720
650
600
Short Time
Capability
30 Seconds
(Amperes)
4320
4200 Volts, 3 Phase
Synchronous
Induction
Motors
0.8 PF 1.0 PF
3500
3000
5500
3000
2750
5000
2750
2500
4500
Short Time
Dielectric
Capability
Withstand
1 Second
1 Minute
(Amperes)
(kV)
AC 13.25
10,800
DC 19
Induction
Motors
Motors
6000
5500
5500
5000
5000
4500
Impulse
Voltage
Withstand
(kV)
60
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