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XNEC-12 SF6 Gas All-Insulation Compact-Type Switchgear


XNEC-12 SF6 gas all-insulation compact-type switchgear adopts modular design, to conform to requirements of end users or network nodes, and to satisfy the demands of various distribution switching stations, packaged substations and cable distribution boxes. It features compact structure, high safety and reliability, long life and free maintenance.
 
XNEC-12 switchgear includes a gas tank welded by 3.0mm stainless steel. All electrical parts and units with switch function are in this gas tank.

Product introduction


Working conditions:
1. Normal conditions:
.Ambient temperature: +40℃ ~ -35℃
.Maximum average humidity: 24 hours measurement value ≤ 95%, 1 month measurement value ≤ 90%
.Altitude: ≤ 2500m (standard gas-filled pressure)
.Earthquake intensity: ≤ 8°
.SF6 gas pressure: 1.4bar (absolute pressure) at 20℃
.Annual leak rate: 2.5‰/year  
.Water immersion test: 0.3bar pressure in water, 24kV 24hours
.Arcing test: 20kA ls with arc extinguisher, 16kA ls without arc extinguisher
.IP code: SF6 gas compartment, IP 67; fuse tube, IP 67; switchgear shell, IP3X
.Busbar: busbar of switchgear, 400 mm2Cu; earthing busbar of switchgear: 150mm2Cu
.Thickness of stainless steel shell of gas compartment: 3.0 mm
2. Special conditions:
.In terms of special operating conditions, the manufacturer and the final user must reach agreements with each other.
.If the altitude is above 1500m, please specially state this for the manufacturer to adjust the pressure.



Technical parameters:
Items
Units
Module C
Module F
Module V
Module CB
Load Switch
Combination Appliance
Vacuum Switch
Disconnecting /Earthing Switch
Vacuum Circuit Breaker
Disconnecting /Earthing Switch
Rated Voltage
kV
12/24
12/24
12/24
12/24
12/24
12/24
Power Frequency Withstand Voltage
kV
42/50
42/50
42/50
42/50
42/50
42/50
Lightning Impulse Withstand Voltage
kV
75/125
75/125
75/125
75/125
75/125
75/125
Rated Current
A
630/630
Note 1
630/630
 
1250/ 800
 
Breaking Capacity
Rated Transfer Current
A
 
1700
 
 
 
 
Closed Loop Breaking Current
A
630/630
 
 
 
 
 
Cable Charging Breaking Current
A
135/135
 
 
 
 
 
5% Rated Active Load Breaking Current
A
31.5/-
 
 
 
 
 
Earthing Fault Breaking Current
A
200/150
 
 
 
 
 
Cable Charging Breaking Current if Earthing Fault
A
115/87
 
 
 
 
 
Short Circuit Breaking Current
kA
 
Note 2
20/16
 
25/20
 
Making Capacity
kA
63/52.5
Note 2
50/40
50/40
63/50
63/50
Short Time Withstand Current (2s)
kA
25/-
 
 
 
 
 
Short Time Withstand Current (3s)
kA
-/21
 
20/16
20/16
25/20
25/20
Rated Peak Withstand Current
kA
50/-
 
50/-
 
 
 
Mechanical Life
Number of Times
5000
3000
5000
2000
10000
5000
Note 1: Depending on rated current of fuse
Note 2: Subject to high voltage fuse

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