ABB MNS-SG - Busbar Compartments; Bus Phases

Manual | MNS-SG Operation and Maintenance 9
Busbar compartment: The compartment where main and
distribution busbar systems are installed.
Cable compartment: Location where power connections
are made to the rear of the device.
MNS-SG standard compartments
MNS-SG standard compartments
1.7. Busbar compartments
The main horizontal busbar is installed in the busbar
compartment located at the middle of the section. The main
horizontal bus may be supplied in various configurations
depending on the current rating.
Horizontal busbars
1.7.1. Bus phases
The horizontal busbar is located at the bottom of each
section. The phase arrangement of 3-phase horizontal
busbar and vertical busbars is A, B, C from top to bottom, or
left to right, as viewed from the front.
The busbar systems are installed in the lower level busbar
compartment. The tie busing will be installed at the upper
level.
Bus Phases
Cable Compartment
Bus Bar Compartment
Device Compartment
Segregation Wall to
Device compartment
Location A
Location B
Location C
Location D
Main Bus Bar
Tie Bus Bar
(Optional)
Breaker segregation
Segregation Wall to
Cable compartment
Device Compartment
Bus Bar Compartment
Cable Compartment
Location CD
Location AB
Tie Bus Bar
Main Bus Bar
Tie Bus Bar
Main Bus Bar
PHASE A
PHASE B
PHASE C
NEUTRAL
PHASE A
PHASE B
PHASE C