12KV/24KV/36kV LBS Indoor High Voltage SF6 Gas Load Break Switch （switch disconnector）

Indoor high-voltage SF6 load break switch is widely used in the 11~36kV electric power distribution systems.

Application

Indoor high-voltage SF6 load break switch is widely used in 11~36kV electric power distribution system , adopted with SF6 gas as an arc-extinguishing and insulation medium, including the three contactors for switching-on and switching-off and to-ground, and is characteristic in its small volume, its convenient installation and operation and its the great adaptability with surroundings.

Indoor high-voltage SF6 load break switch and SF6 load break switch plus fuse combination can function to protect and control the electric equipments for power supply and transformer substations especially being suitable for ring net cabinet, cable branch cabinet and distribution switching substation. indoor high-voltage SF6 load switch and SF6 load break switch plus fuse combination are complied with the standards of IEC60265-1-1998, IEC60420 etc.

Specifications

Service environment

a)Air temperature
Maximum temperature: +40℃; Minimum temperature:-35℃
b)Humidity
Monthly average humidity 95%; Daily average humidity 90% .
c)Altitude above sea level
Maximum installation altitude: 2500m
d)Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e)No frequent violent shake

Parameter

1	Rated voltage		kV	12	24	12	24	36	40.5
2	Rated frequency		Hz	50/60		50/60		50/60
3	Rated current		A	630/800		630/800		630/800
4	1min Power frequency withstand voltage	wet	kV	38	50	38	50	70	80
		dry	kV	48	60	48	60
5	Lightning impulse withstand voltage		kV	75	125/150	75	125/150	170	185
6	Rated short circuit breaking current (peak)		kA	N/A	N/A	N/A	N/A	N/A	N/A
7	Rated active load and close circuit breaking current		A	630	630	630	630	630	630
8	Rated transferring current		A	1700	1200	1700	1200	800	800
9	Rated short circuit making current (peak)		kA	50	40	50	40	40		40
10	Rated cable(line) charging breaking current		A	50 and 10		50 and 10		50 and 10
11	Cable charge breaking current in earthing fault		A	20	20	20	20	20	20
12	Rated withstand current (peak)		kA	50	40	50	40	40	40
13	Short time withstand current (2s)		kA	31.5	25	31.5	25	20	20
14	Mechanism life		times	5000	5000	5000	5000	2000	2000

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