Siemens NXAIR M - 6 Panel Design; Basic Design Circuit-Breaker Panel, Single-Busbar System; Basic Design Circuit-Breaker Panel with HV HRC Fuse

18 NXAIR M 139-2021.9 / 07
Panel design
6 Panel design
6.1 Basic design circuit-breaker panel, single-busbar system
Fig. 16: Sectional view of circuit-breaker panel
design
A
Switching-device compartment
B
Busbar compartment
C
Connection compartment
D
Withdrawable circuit-breaker
E
Low-voltage compartment
(1)
Metallic shutters
(2)
Low-voltage connection
(3)
Operating and interlocking unit for
circuit-breaker
(4)
Vacuum interrupters
(5)
Operating and interlocking unit for racking the
withdrawable part and for earthing
(6)
Removable voltage transformers (optional)
(7)
Feeder earthing switch
(8)
Cable connection for up to 4 cables per phase
(9)
Voltage transformers (optional)
(10)
Contact systems
(11)
Block-type current transformers
(12)
Bushing-type insulators
(13)
Busbar
(14)
Pressure relief duct
6.2 Basic design circuit-breaker panel with HV HRC fuse
Fig. 17: Sectional view of circuit-breaker panel
with HV HRC fuse design
A
Switching-device compartment
B
Busbar compartment
C
Connection compartment
D
Withdrawable circuit-breaker / fuse combination
E
Low-voltage compartment
(1)
Metallic shutters
(2)
Fuse assemblies with HV HRC fuses
(3)
Low-voltage connection
(4)
Operating and interlocking unit for
circuit-breaker
(5)
Vacuum interrupters
(6)
Operating and interlocking unit for racking the
withdrawable part and for earthing
(7)
Connection for up to 2 cables per phase
(8)
Feeder earthing switch
(9)
Contact systems
(10)
Bushing-type current transformers
(11)
Bushing-type insulators
(12)
Busbar
(13)
Pressure relief duct
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