35kV Sf6 Gas Load Break Switch With Operating Mechanism

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35kV Sf6 Gas Load Break Switch With Operating Mechanism Detail:

General Information

35kV Indoor SF6 Switch-Disconnector FL(R)N36 Load Break Switch LBS and fuse combination appliance are suitable for power stations and industrial electrical equipment powered by three-phase AC 50Hz/60Hz ring network or terminal It is used as load control line protection for 35kV power system. The load switch switches load current, closed-loop current, no-load transformer and cable charging current; the combined electrical appliance can break any current up to the rated short-circuit breaking current, and is suitable for complete sets of electrical equipment such as ring network units and box-type substations.

Sf6 Load Break Switch is especially suitable for power distribution in urban residential areas, small secondary substations, switch offices, industrial and mining enterprises, large shopping malls, airports, subways, hospitals, stadiums and other places.

The product complies with GB3804, GB16926, IEC 60265-1 and GB16926, IEC60420 standards.

Structural Features

1. Overall sealed structure: It integrates the load switch, isolating switch and grounding switch, and is sealed in an insulating box filled with SF6 gas, with a relative pressure of 0.04-0.05Mpa, and conforms to the “closed pressure system”.

2. Trinity function: The switch meets the three-station functions of load, isolation and grounding.

3. Operation safety:

a. The switch can only be in one of the “closed”, “open” and “grounded” positions, and has a natural locking function to prevent misoperation.

b. The switch insulation box is equipped with a safety diaphragm, which has the function of backward directional discharge and pressure relief.

c, Contains voltage indicator.

d. It adopts spring operating mechanism and has stable performance.

4. Excellent arc extinguishing and breaking performance:

a. The rated transfer current breaking capacity of the combined appliance is 1400A.

b. It has strong breaking and opening capabilities under zero gauge pressure.

c. Excellent arc extinguishing performance of SF6 gas.

d. Long electrical life.

5. Excellent insulation performance:

a, SF6 gas has excellent insulation properties.

b. The insulating box is made of epoxy resin automatic pressure gel technology (APG), which has high strength, good insulation performance and large margin.

c. Excellent sealing performance, relative annual air leakage rate ≤0.5%.

6. The modular design of the switch makes the structure more compact. The same switch is suitable for different applications and is easy to install.

7. Installing an electric mechanism can realize the “three remote” functions.

35kV Load Break Switch Main Technical Parameters

No	Item		Unit	Parameter
1	Rated voltage		kV	35
2	Rated frequency		Hz	50/60
3	Rated current		A	630
4	1min Power frequency	wet	kV	95
	Withstand voltage	dry	kV	110
5	Lightning impulse withstand voltage		kV	185/215
6	Rated short circuit breaking current (peak)		kA	50
7	Rated active load and close circuit breaking current		A	50
8	Rated transferring current		A	1000
9	Rated short circuit making current (peak)		kA	50
10	Rated cable(line) charging breaking current		A	50 and 10
11	Cable charge breaking current in earthing fault		A	20
12	Rated withstand current (peak)		kA	50
13	Short time withstand current (2s)		kA	20
14	Mechanism life		times	2000

Arc Extinguishing and Breaking Principle

SF6 gas has good arc extinguishing performance. In order to extinguish the arc quickly, when the switch is breaking the current, an arc will be generated when the moving and static contacts are just separated. At this time, due to the magnetic field of the permanent magnet, the arc will be driven to move quickly, causing the arc to It is elongated and continuously combined with SF6 gas to be quickly dissociated and cooled. It is extinguished when the current crosses zero. The double fracture opening distance has the insulation level of isolating the fracture. Permanent magnet rotating arc principle, small operating power.

 

Switch Cabinet Display

 

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Product detail pictures:

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