SF6 ring main unit
SF6 ring main unit
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- Description
- Product Parameters
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- Commodity name: SF6 ring main unit
- Commodity ID: 1326132103950782464
The QLG series ring main unit is a type of SF6 gas-insulated metal-enclosed switchgear independently developed and produced by our company. This ring main unit uses SF6 gas as the insulating and interrupting medium. Inside the SF6 ring main unit, load switches, vacuum circuit breakers, and live busbars are all sealed within a closed stainless steel container filled with gas at a certain pressure. The exterior of the SF6 ring main unit uses American/European standard bushings to connect with incoming and outgoing cables through cable joints, forming a fully insulated and fully enclosed structure, effectively preventing flooding and resisting dirt, making it suitable for various harsh environments. It is widely used in 12kV ring network or terminal power supply systems.
The SF6 ring main unit uses high-performance SF6 insulating gas, greatly improving insulation performance. Its compact structure allows for a small footprint, which is very beneficial for miniaturization development. By using SF6 gas, the arc-extinguishing performance of the ring main unit is effectively enhanced. Our gas cabinet adopts a fully enclosed structure, ensuring that the core components of the switch are not affected by external environmental conditions, greatly enriching the usage scenarios of this type of ring network; the adoption of a maintenance-free product structure also significantly reduces maintenance work and lowers maintenance costs.
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Rated Parameters
Serial Number
Item
Unit
Parameter
1
Rated Voltage
kV
12
2
Rated Current
A
630/1250
3
Rated Frequency
Hz
50
4
1minPower Frequency Withstand Voltage
Phase-to-Phase and Ground
kV
42
Isolation Break
kV
48
5
Lightning Impulse Withstand Voltage
Phase-to-Phase and Ground
kV
75
Break
kV
85
6
Rated SF6 Gas Pressure
(Gauge Pressure at 20℃)
MPa
0.04
7
SF6Annual Leakage Rate
%
≤0.05
8
Protection Level
SF6Gas Chamber
IP67
Cabinet Body
IP4X
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