Siemens NXAIR - Basic Design Circuit-Breaker Panel; Basic Design Circuit-Breaker Panel with Forced Ventilation

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