MEDIUM VOLTAGE CONTROLLERS
JK720 Series
The new JK720 Series of motor controller is the
result of extensive research and development.
This state-of-the-art controller was designed in
Houston, Texas, and is currently being manufac-
tured under ISO 9001 standards in the same
manufacturing facility as Toshiba motors and
drives. The components in this new series have
been arranged in the most logical manner to
produce a tightly designed unit. This stream-
lined, space saving design provides the ultimate
in maintenance ease and safety features.
These medium voltage controllers are available in
across-the-line or reduced voltage models for the
control of induction, wound rotor or synchronous
motors, transformers, or capacitors up to 4.8kV.
All controllers are designed to meet NEMA Class
E2 requirements. These fixed type controllers
are available in one high enclosures with the
following standard features:
Standard Features Full & Reduced
Voltage Controllers
Toshiba Medium Voltage Vacuum Contactor 720A
Bolted Pressure Switch Connections
36" Wide Footprint
Rigid 11 Gauge Steel Frame
Front Accessible Main Bus
Current Transformers
Current Limiting, High Interrupting Capacity,
"R" Rated Motor Starting Fuses
Start and Stop Push Buttons
Run and Off Pilot Lights
Single Phase Ammeter
Control Power Transformer with Primary
and Secondary Fuses
Thermal Bimetallic Overload Relay
Separate Medium and Low Voltage
Compartments
Built-in Run/Test Circuit
Mechanical and Electrical Interlocks
Isolated Low Voltage Compartment
The low voltage section is oversized and is at a
convenient height. This section is isolated from
the medium voltage section and includes:
Thermal Overload Protection Relay
Pilot Lights (door mounted)
Push Buttons (door mounted)
Single Phase Ammeter (door mounted)
CPT Secondary Fuses
Control Terminal Points for Customer Connections
Timers (for Reduced Voltage Controllers)
Standard Options:
Metering & Metering Switches
Ground Fault Protection Relay
Phase Sequence Protection Relay
RTD Monitor/Relay
Solid State (2E) Protection Relay
(Overload/Single Phase)
S2E21 Multi-funtion Protection Relay
Standard Features:
Bolted Pressure Isolation Switch
Less Resistance
Less Wear
Zero Insertion Pressure
Mechanical Interlocking System
Reduced Voltage Autotransformer
Controller
Additional Standard Features:
Shorting (400A) and Run (720A), Vacuum
Contactors
NEMA Medium Duty, Three Winding, Copper
Wound Autotransformer with 50%, 65%, and
80% Taps
Adjustable Solid State Transition Timer
Adjustable Solid State Incomplete Sequence
Timer
If UL or CUL is required, specify when ordering.
Consult Factory for applicable models and options.
