Toshiba JK Series Instruction Manual page 15

GENERAL DESCRIPTION
C. Service Drawer (Fig. 12)
The withdrawable contactor carriage is moved in
and out of the power cell on a built-in slide-out
service drawer. The drawer has four locating
pins on top of it. When the contactor carriage is
placed on the drawer, these pins engage four
holes in the bottom of the carriage, which serve
to align it properly. The drawer moves in and out
of the power cell on sliding ball-bearing type
rails. There is a handle on the front of the drawer
to provide a gripping point.
When the carriage is installed in the power cell,
the following connections are automatically
made:
1) The line side stabs engage the fixed-
mounted isolation switch connecting the load
side of the switch to the line side of the
power fuses.
2) The load side stabs engage the fixed-
mounted load receptacle connecting the load
side of the vacuum contactor to the outgoing
cell terminals.
3) Medium voltage control power take-off stabs
engage stationary clips on the left side of the
cell, providing a connection point for the
OEM to derive primary power for the control
power transformer. These take-off stabs are
electrically connected to the load side of the
main power fuses.
D. Load Receptacle (Fig. 13)
The load receptacle is a fixed three-phase
disconnecting block, which uses bolted pressure
type stab contacts similar to those used in the
isolation switch. The vacuum contactor load
stabs on the withdrawable carriage engage the
load receptacle when the carriage is installed.
The operation of the bolted pressure contact
mechanism is controlled by a release lever
located at the front of the power cell below the
service drawer. Outgoing load cables are to be
connected by the OEM to the terminal pads that
are furnished on the rear of the load receptacle.
Fig. 12 Service Drawer
Fig. 13 Load Receptacle
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