Rockwell Automation Allen-Bradley 7712, User Manual

Page: 30 / 74

30 Rockwell Automation Publication 7712-UM001D-EN-P - October 2017
Chapter 4 Equipment Operation
5. Withdraw speed wrench tool.
Operation of Motor
Controller
Earthing Switch Operation
Open Earthing Switch
1. Insert the earthing switch tool at the end of the earthing switch shaft
( Figure 9 ).
Figure 9 - Open Earthing Switch
2. Rotate the earthing switch tool approximately 65° clockwise until the
switch is completely open.
Close Earthing Switch
IMPORTANT
The tool must be withdrawn from the mechanism without any rotation. This
ensures the locking plate in the front of the cart will slide forward and lock
the end of the racking screw locking in the same time the cart position. The
tool access flap must cover the opening after the speed wrench is redrawn.
IMPORTANT
Before opening the earthing switch, ensure:
• the contactor cart is in the withdrawn/test position; and,
• the door is closed and latched.
IMPORTANT Before closing the earthing switch, ensure:
• the contactor cart is in test/withdrawn position (if the cart is in the
operating position, the earthing switch will not close); and,
• the door is closed and latched.
Earthing
Switch
Tool
Earthing Switch
Shaft