GE Industrial Solutions Limitamp AR - Manual (Page 6)

High-Voltage Door Defeater Latch
WARNING: The following steps should be taken only as a last
resort to enter a malfunctioning controller. It is imperative
that all power to main bus be removed before proceeding.
IN CASE OF EMERGENCY, remove all power to the controller,
then the high-voltage door may be opened with the contactor
in the closed position and with the isolation switch closed, by
following the procedure listed below.
WARNING: Do not proceed unless all power to the
controller is removed. In this situation, doors must not
be opened with power connected to the bus.
Figure 12. View showing door interlock defeater locking nuts. Figure 13. View showing door interlock defeater.
Step 1: Remove the door interlock defeater locking nuts as
shown in Figure 12.
Step 2: Rotate the door latch operating handle 90° counter-
clockwise to disengage the multiple door latches on the inside
of the high-voltage door.
Step 3: Turn all flange nuts simultaneously until disengaged
from hat brackets.
Step 4: The high-voltage door should be able to be opened by
pulling out on the silver handle. As you pull on the door, the
door interlock defeater will pull away from the door.
WARNING: Defeating high-voltage door interlock leaves
the power fuses and contactor connected to the bus.
The bus power must remain de-energized while the
high-voltage door is open.
Door Interlock Defeater
Locking Nuts
Door Interlock Defeater
CR 194 One/Two-High Vacuum Limitamp ® AR Control Page 6