Bus Sectionalizer; Panel Construction; Busbar Compartment; Low-Voltage Compartment - Siemens NXAirS Manual

NXAirS description
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.
Basic components Busbar
●
Withdrawable unit
●
Disconnecting module
●
Low-voltage plug connector with mechanical interlock between module and panel
●
Busbar in the cable Connection compartment
●
Option 2 or 3 CT
●
2 or 3 PT
●
7. Panel construction
Basic components
Enclosure made of bended galvanized steel-sheet
●
Door of the HV compartment is powder-coated with epoxy resin
●
Individual, self-supporting, modular compartments in solid-wall design
●
Compartments are bloted together
●
The sheet between compartments can withstand pressure of arcing
●
Each compartment relieves pressure upwards
●
Figure 2. cutaway view of the panel construction
NXAirS Withdrawable Metal-enclosed Switchgear, Rated Voltage Up to 12kV
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
7