Rockwell Automation 1500 Isolation Switch Handle Interlock Mechanism Engagement Replacement - Manual (Page 2)

 Bulletin 1500/1900 Isolation Switch Handle – Interlock Mechanism Replacement
1500-IN052C-EN-P – January 2007
1) Disconnect and lock out all feeder power supplies to the starter.
2) Move the isolation switch handle to the OFF position.
3) If the unit is equipped with power factor correction capacitors, stored energy must be
dissipated before entering the power cell. Wait at least five minutes before entering
the power cell or dissipate the power using the following procedure:
a) Verify that the isolation switch handle is in the OFF position.
b) Open the low voltage door.
c) Plug the appropriate power supply (120 or 230V) into the auxiliary power receptacle
as shown on the electrical drawing.
d) Move the control switch to the TEST position.
Auxiliary Power Receptacle
Control Switch
Figure 1 – Control Panel
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 OFF position.
Disconnect the external power supply.
g) Complete the Power Lockout 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 2).
Power Lock-out
Procedure (cont.)