Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 34)

26 Rockwell Automation Publication 1500-UM055G-EN-P - May 2013
Chapter 3 Installation – Arc-Resistant Enclosure (ArcShield)
Access to the Power Bus
Rear Access
1. Remove the hardware securing the center rear bus access cover (see
Figure 25 ).
2. Remove the center rear bus access cover.
3. Once the rear bus cover is removed you will see the three power bus bars
and ground bus (see Figure 27 ).
Figure 25 - Access to Power Bus from Side and Rear of Cabinet
Side Access
A side bus access cover is located on each side of the controller.
1. Remove the hardware from the appropriate side bus access cover.
2. Remove the side bus access cover (see Figure 25 ).
3. ArcShield units at the end of a line-up have a ground connection to the
inner plate of the side bus access cover (see Figure 26 to Figure 28 ). This
connection must be maintained to ensure unit arc resistant performance.
ATTENTION: This procedure requires contact with medium voltage
components. To avoid shock hazards, lock out incoming power before working
on the equipment (refer to
Power Lock-out Procedure on page 47 of Chapter 5 ).
Verify with a hot stick or appropriate voltage measuring device that all circuits
are voltage free. Failure to do so may result in severe burns, injury or death.
Side Bus Access Cover
Center Rear Bus Access Cover