Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 30)

22 Rockwell Automation Publication 1500-UM055G-EN-P - May 2013
Chapter 3 Installation – Arc-Resistant Enclosure (ArcShield)
Opening the Medium Voltage Doors
Medium voltage doors are identified as MV in Figure 21 .
Figure 21 - Access to Medium Voltage Compartments
Refer to Access to the Power Bus on page 26 for the procedure to open the swing-
out low voltage panel behind the low voltage door (for standard cabinet only).
1. Electrically open the contactor by pressing the STOP button on the starter
or at the remote control location.
2. Move the isolation switch handle to the OFF position (see Figure 22 ).
3. Turn the release handle counter-clockwise 90 degrees.
4. Unbolt the door locking bolts for medium voltage door.
5. The door is now released and will swing open.
ATTENTION: Complete the Power Lock-out procedure (refer to Power Lock-out
Procedure on page 47 of Chapter 5 ) before beginning any service procedures to
the unit. Failure to do so may result in severe burns, injury or death.
LV
MV LV
MV LV
MV LV
MV
Chimney
Upper Low Voltage
Door handle
Lower Low Voltage
Door handle
Plenum
Upper Low Voltage
Door handle
Lower Low Voltage
Door handle
IMPORTANT Each medium voltage door has its own isolation switch handle and
interlocking safeguards. Upper and lower power cells are separated by an
isolation barrier.