Suitable for Opening and Closing Load Currents and Overload Currents in The Power System At A Rated Voltage of 12kv, Rated Current of 630a, 50/60hz Distribution Network, and Can Automatically Isolate The Faulted Distribution Line Section from The Switch
In Addition to The Standard Ceramic Bushings, A Variety of Solutions are Available, Including Rubber Insulators on Epoxy Equipment Bushings
A Spring-Loaded Energy Storage Operating Mechanism Ensures Fast Closing and Breaking Operations (Less Than 110ms)
Standby Electronic Controller for Both Local Operation and Main Console Operation Using Ftu/Rtu Interface
The Switches are Made from Proven Robust and Corrosion Resistant Materials (304l Stainless Steel Plate for Warships), Ensuring A Long Service Life (30 Years) and The Ability to Perform A Range of Operations, Ideal for Column Mounted Equipment
Sf6 Gas is A Non-Toxic, Non-Flammable Electrical Insulating Gas with Excellent Arc Extinguishing Characteristics, Each Switch is Factory-Filled with Sf6 Gas, Sealed and Tested According to Iec60265-1(1988) and Gb3804-1990 Standards
LW3-12/630-20 column-mounted circuit breaker is suitable for opening and closing load currents and overload currents in the power system at a rated voltage of 12kV, rated current of 630A, 50/60Hz distribution network, and can automatically isolate the faulted distribution line section from the switch.
1. SF6 gas is a non-toxic, non-flammable electrical insulating gas with excellent arc extinguishing characteristics.
2. In addition to the standard ceramic bushings, a variety of solutions are available, including rubber insulators on epoxy equipment bushings.
3. The colour-coded main contact position indicator (green - open; red - closed) is easily visible when standing on the ground. This indicator is directly connected to the main contact drive shaft assembly to ensure accurate indication of contact status.
4. A spring-loaded energy storage operating mechanism ensures fast closing and breaking operations (less than 110ms).
5. Standby electronic controller for both local operation and main console operation using FTU/RTU interface.
6. The switches are made from proven robust and corrosion resistant materials (304L stainless steel plate for warships), ensuring a long service life (30 years) and the ability to perform a range of operations, ideal for column mounted equipment.
7. Each switch is factory-filled with SF6 gas, sealed and tested according to IEC60265-1(1988) and GB3804-1990 standards.
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Rated parameters |
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Other technical parameters |
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Power frequency withstand voltage |
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The rated voltage |
12kV |
Internal arc test |
20kA/0.1sec |
10sec (wet test) |
45kV |
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Rated current |
630A |
Arc suppression medium |
SF6Gas |
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Rated frequency |
50/60Hz |
Insulating medium |
SF6Gas |
1min (dry test) |
50kV |
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Short-time Tolerance Current (RMS) |
20kA/4sec |
Creep distance (porcelain casing) |
550mm |
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Creep distance (silicone sleeve) |
615mm |
1min (dry test) |
50kV |
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Protection grade |
54 |
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Mechanical properties of |
Impact pressure (1.2×50μs) |
gas pressure |
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Closing/opening time |
<0.1sec |
relatively |
85kV |
rated working pressure(kgf/cm2G,at20ºC) |
0.7 |
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Mechanical stability operation |
10,000 times |
Explosion-proof device operating pressure(kgf/cm2G) |
4~6 |
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Ambient temperature |
-25(-40)~70ºC |
Between the fracture |
95kV |
minimum operating pressure(kgf/cm2G) |
0.05 |
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Gas leakage rate(cc/sec) |
1.1×10-7 |
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