Rockwell Automation 1503 OEM Starter Frame Components Installation Manual - Manual (Page 37)

1503-IN050E-EN-P – June 2013
Adjustments 3-3
e) Electrically operate the contactor by pushing the START button
on the unit or at a remote location.
f) Disengage the contactor and move the control switch to the NOR-
MAL position. Disconnect the external power supply.
g) Complete the Power Lock-out procedure
4) Open the medium voltage door.
5) Visually inspect that the isolation switch blades fully engage the
grounding pins on the grounding bar. The isolation switch shutters
should be closed (see Figure 3.3).
Grounding Bar
Isolation Switch Blades must
fully engage Grounding Pins
of Grounding Bar
(Verify for each phase)
Isolation Switch Shutters
must be closed.
(Verify for each phase)
Figure 3.3 – Inspecting Isolation Switch in Open Position
6) Check the line and load sides of the contactor with a hot stick or appro-
priate voltage measuring device to verify that they are voltage free (see
Figure 3.4).
a) Check for line-side voltage at the top vacuum bottle terminals.
b) Check for load-side voltage at the bottom vacuum bottle terminals.