Switchgear Description - ABB GE Entellysis Installation, Operation And Maintenance Manual

3 . s w I TC h G e a r D e s C r I p T I o N

3. Switchgear description

3.1 Receiving
This section contains a description of the
ABB low voltage switchgear. It also describes the
functions of the electrical and mechanical systems.
Figure 3.1 is a side view of a typical section
showing compartmentation.
—
Intersectional
Fig. 3.1
control wiring
Side-view section of
trough
low voltage switchgear
Compartment
doors
Instrument
panel or
entelliguard
messneger
Vertical
control wire
gutter
Compartment
doors
Breaker or
instrument
compartment
A
Breaker
compartment
B
Breaker
compartment
C
Breaker
compartment
D
3.2 Summary description
ABB low voltage switchgear is a freestanding
assembly of metal-enclosed sections containing
low voltage power circuit breakers, bus bars, cable
termination provisions, auxiliary power circuit
protective devices, controls, and instrumentation.
It may also be an integral part of a load center unit
substation, either singleended or double-ended.
Neutral bus
Vertical riser
bus bars
Cable termination
area
Main bus bars
Breaker
compartment run
back and cable
termination
14
Cable
compartment
doors
Enclosed trough
for external
control circuit
wiring
Ground bus