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