NXAirS Withdrawable Metal-enclosed Switchgear, Rated Voltage Up to 12kV
7
NXAirS description
7. Panel construction
6.5 Bus sectionalizer
A bus sectionalizer consists of 2 modules:
One circuit-breaker module panel and one disconnecting module used as bus riser panel.
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Busbar
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Withdrawable unit
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Disconnecting module
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Low-voltage plug connector with mechanical interlock between module and panel
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Busbar in the cable Connection compartment
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2 or 3 CT
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2 or 3 PT
Basic components
Option
Basic components
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Enclosure made of bended galvanized steel-sheet
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Door of the HV compartment is powder-coated with epoxy resin
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Individual, self-supporting, modular compartments in solid-wall design
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Compartments are bloted together
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The sheet between compartments can withstand pressure of arcing
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Each compartment relieves pressure upwards
1.
Low-voltage plug connector
2.
Drive and interlock unit of the circuit--Breaker
3.
Vacuum interrupter
4.
Fix and move contact
5.
The operation mechanism of circuit-breaker and
earthing switchgear, and Interlock device
6.
Making proof earthing switch
7.
4 cables per phase connecting
8.
Current transformer
9.
Contact box
10.
Busbar
11.
Pressure release channel
A.
HV compartment
B.
Busbar compartment
C.
Connection compartment
D.
Circuit--Breaker module compartment
E.
Low- voltage compartment
Figure 2.
cutaway view of the panel construction
