LW25-252 4000-50 outdoor circuit breaker 252KV

LW25-252/4000-50 self-energy AC high-voltage SF6 circuit breaker is an outdoor product, which is suitable for 50Hz AC power grid with altitude not exceeding 2000 meters, ambient temperature not lower than 30℃, maximum voltage 252kV and pollution level not higher than IV. Used to cut off rated current, fault current or switch lines to achieve control and protection of the power system can also be used as wire cutters.

Product Detail

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This product uses SF6 gas as the arc extinguishing insulating medium, adopts the world's most advanced self-energy arc extinguishing technology, and is equipped with a new spring operating mechanism, long electrical life, low running power, low noise, high reliability, simple structure, small volume, long maintenance cycle. In the current process of power equipment towards oil-free and large capacity, it can completely replace the same type of imported products.

Operating condition

Temperature :-10℃~ + 40℃

Relative humidity: the daily average relative humidity is not more than 95%; The average monthly relative humidity does not exceed 90%

Earthquake intensity: not more than 8.

Saturated vapor pressure: the daily average pressure does not exceed 2.2kPa, the monthly average pressure does not exceed 1.8Kpa

Altitude :≤1000m(except for special circumstances)

The device should be installed in a place without fire, explosion, serious dirt, chemical erosion, and violent vibration.

Technical parameter

Item	Unit	Data
Rated voltage	KV	252
Rated power frequency	Hz	50/60
Rated current	A	4000
Rated power frequency withstand voltage (1min) KV	Isolating	460+146
Rated power frequency withstand voltage (1min) KV	To ground	460
Rated lightning impulse withstand voltage (1min) KV	Isolating	1050+206
Rated lightning impulse withstand voltage (1min) KV	To ground	1050
Rated short-circuit breaking current	KA	40/50
Rated withstand current(peak)	KA	125
Rated short-time withstand current(3s)	KA	40/50
Rated short-circuit making current(peak)	KA	125
Phase to phase spacing	mm	3000-4000
Moving contactor travel	mm	160
Moving contactor overtravel	mm	50
Opening time	ms	30
Closing time	ms	90
Trip time	ms	60
First pole to clear factor		1.3
Rated out-of-phase breaking current	KA	12.5
Short-line fault breaking capability	KA	90%IK/75%IK
Rated line-charging breaking current	A	200
Rated operation sequence		O-0.3s-CO-180s-CO
Main circuit resistance	μΩ	≤55
Rated SF6 gas pressure(20℃)	Mpa	0.6
Rated minimum SF6 gas pressure(20℃)	Mpa	0.55
SF6 gas leakage rate(yearly)	Mpa	≤0.5%
Gas moisture content	ppm	≤150
Mechanism life	times	10000
Radio interference	μV	＜500
Creepage distance (mm)	Isolating	8660
Creepage distance (mm)	To ground	6900
Heating and lighting voltage	V	220ACV
Control system voltage	V	220DCV/ACV
Mass of filled SF6 gas(single pole)	Kg	8
Mass of equipment(single pole)	Kg	1500
Dimension (single pole) WDH	mm	7006506920