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Panel design
26
NXAIR /
≤ 40 kA
110-0134.9 / 14
6.2
Basic design circuit-breaker panel
Fig. 27: Sectional view of circuit-breaker panel design
A Switching-device compartment
B Busbar compartment
C Connection compartment
D
Withdrawable circuit-breaker /
circuit-breaker truck
E Low-voltage compartment
(1) Metallic shutters
(2)
Operating and interlocking unit for
circuit-breaker
(3) Ventilation system (optional)
(4) Feeder earthing switch
(5) Cable / bar connection
(6) Voltage transformers (optional)
(7) Block-type current transformers
(8) Busbar
(9) Pressure relief duct
6.3
Basic design circuit-breaker panel with forced ventilation
Fig. 28: Sectional view of circuit-breaker panel design
with forced ventilation
A Switching-device compartment
B Busbar compartment
C Connection compartment
D Withdrawable circuit-breaker
E Low-voltage compartment
(1) Fan box