Toshiba JK Series Instruction Manual page 16

GENERAL DESCRIPTION
E. Interlocks - Mechanical
When the withdrawable contactor carriage is
inserted into the
interlocking is established between the isolation
switch, the vacuum
compartment door.
a. Door Interlock Bracket
A door interlock bracket is provided to prevent
opening or closing
compartment door unless the switch operating
handle is OFF. This interlock is the same as that
furnished on cells with fixed-type contactors
(refer to Fig. 6).
b. Handle Interlock to Door
A mechanical interlock is provided which
prevents moving the handle from OFF to ON
unless the compartment door is closed. This
interlock is the same as that furnished on cells
with fixed-type contactors (refer to Fig. 7).
c. Handle Interlock to Vacuum Contactor
The vacuum contactor
interlocked to prevent it from closing unless the
switch handle is in the fully ON or fully OFF
position. The interlock shown in Fig. 14 provides
this function.
If the switch handle is in an intermediate
position, and a closing signal is given to the
contactor, it is mechanically prevented from
operating by the interlock.
This interlock also prevents the switch handle
from being moved in either direction unless the
contacts of the vacuum contactor are opened.
F. Interlocks - Electrical
Control Power Interlock (CPI)
The control power interlock microswitch is the
same as that furnished on cells with fixed-type
contactors (refer to Fig. 9).
power cell, mechanical
contactor and
the medium voltage
is mechanically
the
Fig. 14 Handle Interlock to Vacuum
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Contactor