40.5KV High Voltage Outdoor SF6 Gas Circuit Breaker

LiuGao stands as a dedicated 40.5KV High Voltage Outdoor SF6 Gas Circuit Breaker manufacturer,SF6 Gas Circuit Breaker pts the fully enclosed structure, and the secondary winding is sealed in the epoxy resin casting body to ensure the insulation performance. The LW8-40.5Y SF6 Circuit Breaker boasts a robust mechanism with a service life exceeding 3000 operations, ensuring long-term reliability.Its sealing performance is dependable, employing imported sealing rubber pads.The dynamic seal incorporates a "V"-type sealing ring with a spring pressure compensation structure, and the secondary terminal board, provided by a cooperative enterprise, ensures an annual air leakage rate of less than 1%.Additionally, the built-in current transformer adopts a fully enclosed structure, with the secondary winding sealed in epoxy resin casting to ensure optimal insulation performance.

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Product Description

Liugao is 40.5KV High Voltage Outdoor SF6 Gas Circuit Breaker supplier.LW8-40.5 Outdoor HV SF6 circuit breaker is designed for three-phase AC 50Hz outdoor high voltage electrical applications in 35kV transmission and distribution systems. It serves the purpose of control and protection and can also be utilized for the opening and closing of contact breakers and capacitor banks, with the option to include a current transformer for measurement and protection functions. The circuit breaker is equipped with a CT14-type spring operating mechanism, and it adheres to both the national standard GB1984-89, titled "AC high voltage circuit breakers," and the International Electrotechnical Commission standards IEC56, specified in the publication "High-voltage AC circuit breaker."

40.5KV High Voltage Outdoor SF6 Gas Circuit Breaker Operating Environment

1. Altitude: no more than 2500; meters; plateau 4000 meters;

2. Ambient temperature: -30°C-+40°C (special requirements -40°C-+40°C);

3. Relative humidity: the daily average is not more than 95%, the monthly average is not more than 90% (25°C);

4. Wind speed: no more than 35m/s; the pollution level is I; the creepage distance of the porcelain sleeve is 1050mm (1320mm) (the nominal creepage distance is not less than 25mm/kV);

5. Sunshine: 0.1w/cm;

40.5KV High Voltage Outdoor SF6 Gas Circuit Breaker Specification

No. Description		Technical parameters
1	Rated voltage, kV	72.5			126	145	252
3	Rated frequency, Hz	50/60
4	Rated current, A	1600~4000					3150~4000
	1min Power frequency withstand voltage	140		230		265	460
	Lightning impulse withstand voltage	325		550		650	1050
5	Rated short-circuit breaking	25~40					40~63
	current, kA
7	Rated short circuit breaking	63~ 100					100~ 157.5
	current (peak), kA
8	Rated short duration, s	3	3			3	3
	Rated out-of-phase breaking current	10	10			10	10
	Rated cable(line) charging	10	31.5			50	125
	breaking current
	Rated gas pressure, Mpa	0.4 0.5				0.5	0.6
	Operation sequence	O-0.3s-CO- 180s-CO
	SF6 gas leakage rate (per year)	≤1%
14	First of several genes	1.5		1.55		1.5	1.3
	Main loop resistance, μΩ	≤40		≤45		≤45	≤50
	Heater voltage	AC220
	Control circuit and signal circuit voltage	DC220, DC230
	Motor voltage	DC220, DC230