Rockwell Automation 1512A MV Controllers - 800A One-High Cabinet - Manual (Page 69)

Maintenance 5-21
1512A-UM102B-EN-P – June 2013
The interlocking mechanism of the medium voltage starter is designed
to prohibit access to the power cell while the isolation switch handle is
in the ON position and the isolation switch is closed.
The following procedure is intended to be used only
when the isolation switch cannot be opened as de-
scribed in the Door Opening Procedure (page 2-1).
This procedure may expose personnel to energized
medium voltage components. Whenever possible,
lock out incoming power before beginning this
procedure. If you are unable to lock out incoming
power, use the appropriate protective equipment and
work practices to avoid shock hazards. Failure to do
so may result in severe burns, injury or death.
1) Remove the two 1/4-20 self-tapping screws from the Z-clip and
remove the Z-clip.
Figure 5.18 - Z Clip
2) Remove the two door locking bolts.
3) Use a flat-headed screwdriver to turn the defeater pin on the right
side of the isolation switch handle (see Figure 5.17).
4) Open the power cell door.
Emergency Circumvention
Procedure for Power Cell Entry
I M P O R T A N T I M P O R T A N T
A T T E N T I O N A T T E N T I O N