General Description - Toshiba JK Series Instruction Manual

GENERAL DESCRIPTION

JK Series OEM power cells are designed for
installation into an enclosure provided by the
original equipment manufacturer (OEM). The
OEM is then responsible for adding power bus,
control devices and other components such as
current-limiting fuses,
control power transformers, etc. to complete the
installation.
Each JK Series OEM power cell is a modular
unit containing a vacuum contactor, isolation
switch, power fuse clips and other basic
components necessary for the OEM to construct
an AC general-purpose NEMA Class E medium
voltage controller. These controllers are intended
for application at utilization voltages ranging from
2.3 through 6.6 kV at full load currents up to
360A. For complete ratings, refer to the
SPECIFICATIONS section of this manual.
The power cells
configurations, one having a fixed-type (bolted-
in) vacuum contactor and the other offering a
withdrawable vacuum contactor. In the fixed
type design, all components including the
contactor are bolted into the power cell. The
withdrawable type is similar, except that the
contactor and power fuses are mounted on a
separate carriage which can be withdrawn from
the power cell on a built-in slide-out service
drawer.
Power cells with fixed type contactors (Fig. 1)
include the following components:
- Isolation Switch
- Operating Handle for Isolation Switch
- Power Fuse Cartridges (3)
- Vacuum Contactor (bolted-in)
- Mechanical and Electrical Interlocks
- Door Interlock Bracket (shipped loose)
Power cells with withdrawable type contactors
(Fig. 2) include the following components:
- Isolation Switch
- Operating Handle for Isolation Switch
- Fused Vacuum Contactor (withdrawable)
- Mechanical and Electrical Interlocks
- Door Interlock Bracket (shipped loose)
current transformers,
are available in
Fig. 1 Power Cell With Fixed Type
two
Fig. 2 Power Cell With Withdrawable
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Contactor
Type Contactor
RELEASE LEVER