Rockwell Automation 1512A MV Controllers, 400A One-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 12)

4 Rockwell Automation Publication 1512A-UM100F-EN-P - May 2013
Chapter 2 Installation – Standard Enclosure
Opening the Medium Voltage Doors
Medium voltage door is identified as MV in Figure 3 .
Refer to Access to the Power Bus on page 7 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.
3. Unscrew the door locking bolts for the medium voltage door.
4. The door is now released and will swing open.
5. Reverse the procedure to close the door
ATTENTION: Medium voltage components may be located behind the swing-
out low voltage panel (standard cabinets only). Complete the power lockout
procedure (refer to
Power Lock-out Procedure on page 41 of Chapter 5 ) before
attempting to open the swing-out low voltage panel. Failure to do so may result
in severe burns, injury or death.
ATTENTION: Complete the Power Lockout procedure (refer to Power Lock-out
Procedure on page 41 of Chapter 5 ) before beginning any service procedures to
the unit. Failure to do so may result in severe burns, injury or death.
IMPORTANT The medium voltage door has its own isolation switch handle and interlocking
safeguards.
IMPORTANT Ensure that the swing-out low voltage panel is in its original position
before attempting to close the MV door. When closing the medium
voltage door, ensure all door locking bolts on the right side of the MV
door are in place and tightened until the door is flush with the flange.
Do not overtighten the bolts. If the door is not securely fastened, it will
not be possible to move the isolation switch handle to the ON position.
ATTENTION: Complete the Power Lock-out procedure (refer to Power
Lock-out Procedure on page 41 of Chapter 5 ) before beginning any
service procedures to the unit. Failure to do so may result in severe
burns, injury or death.