Rockwell Automation 7763 OneGear MV SMC Flex Solid-State Motor Controller - Manual (Page 31)

Rockwell Automation Publication 7760-IN001
B-EN-P - June 2013
29
Equipment Installation Chapter 3
Electromechanical Interlock The Bulletin 776X interlocking system is comprised of both an electrical and a
mechanical system. The unit has been shipped with the interlocking system
disabled for ease of transportation, inspection and installation.
The door latch of the Guardmaster electromechanical lock is not installed on the
door flange when the unit is shipped from the factory. The door latch is shipped
loose, inside a bag attached to the inside of the leftmost MV door (
Figure 30 ).
Ensure the following steps have been completed before installing the door latch
on the door flange.
1. Complete the mechanical installation of the equipment into final position.
2. Complete low voltage wiring between functional units and ensure control
circuit is functioning properly.
3. Ensure control power is connected to the controller.
Once steps 1 through 3 noted above are completed, the door latch may be
installed and interlock integrity tested.
To install the Guardmaster door latch, attach it to the bracket already attached to
the rear of the leftmost medium voltage door, using only the supplied hardware
(
Figure 31 ). Interlock is setup and adjusted at factory before shipment. Ensure
interlock is operating properly before putting controller into service. Refer to
project specific electrical diagrams for control power connections and
operational details.
IMPORTANT The medium voltage access doors, on the front of the converter cabinet are
equipped with a Guardmaster electromechanical interlock. Once door latch is
installed, control power and inter-cabinet control wire must be completed.
These doors will not open once the door latch is installed unless control power
is applied and wiring is complete.
WARNING: Failure to install the interlock latch and completion of the
electromechanical interlocking system, may lead to personal injury or death,
property damage, or economic loss.
TIP The electromechanical interlock is a fail safe device. Once the door latch is
installed and the door is closed, it will remain locked in the closed position
until all control wiring is complete and to permit energization of the low
voltage controls within the converter cabinet.
TIP The mechanical interlocking system prevents the mechanical latching of the
left most medium voltage door unless the middle and right medium voltage
doors are closed and latched.