ppendix II
Example: Procedure for Dragline and Shovel MG Sets
(Individual Electrical Tag)
6900 volts
OCK
To work on MG Sets or DC Motors on a
Dragline or Shovel, open and lock the visible
disconnect that removes power from the MG
Set Stator or Drive isolation Transformer then
ground the load side of the switch.
Open and Lock the visible disconnect or
Breaker that feeds power to the Generator
Field Exciter.
If Static Motor Fields or Space Heaters
are used in the motors, open and lock the
breakers feeding those circuits as well.