LW -252 SULFUR HEXAFLUORIDE CIRCUIT BREAKER INTERGRATEDTYPE(SPLITTYPE)

Short Description:

LW □ -252/4000-50 self-energy AC high-voltage sulfur hexachloride circuit breaker for outdoor products, applicable toaltitude not exceeding 2000 m, ambient temperature not less than-30 ℃ , AC 50 Hz of the area where the pollution level is not higher than level IV, in the grid with a maximum voltage of 252kV, to cut offrated current , faulty current, or switching lines, to control and protectthe power system, can also be used as a contact circuit breaker.SF6 gas is used as an arc extinguishing and insulating medium,using the most advanced self- powered arc extinguishing technologyin the world. With a new spring operating mechanism, it has thecharacteristics of long life, low operation, low noise, highreliability.It’s simple structure, small size, long period of free maintenance.In the current process of power equipment becoming oil- free andlarge capacity, it can completely replace the same type of imported products.

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Product Overview
LW □ -252/4000-50 self-energy AC high-voltage sulfur hexachloride circuit breaker for outdoor products, applicable toaltitude not exceeding 2000 m, ambient temperature not less than-30 ℃ , AC 50 Hz of the area where the pollution level is not higher than level IV, in the grid with a maximum voltage of 252kV, to cut offrated current , faulty current, or switching lines, to control and protectthe power system, can also be used as a contact circuit breaker.

SF6 gas is used as an arc extinguishing and insulating medium,using the most advanced self- powered arc extinguishing technologyin the world. With a new spring operating mechanism, it has thecharacteristics of long life, low operation, low noise, highreliability.It’s simple structure, small size, long period of free maintenance.In the current process of power equipment becoming oil- free andlarge capacity, it can completely replace the same type of imported products.
Main Technical Parameters

No.	Item		Unit	Data
1	Rated voltage			252
2	Rated power frequency withstand voltage(1min)	To earth	kV	460
2	Rated power frequency withstand voltage(1min)	Fracture		460+146
3	Rated lightning impulse withstand voltage	To earth		1050
3	Rated lightning impulse withstand voltage	Fracture		1050+206
4	Rated frequency		Hz	50
5	Rated current		A	4000
6	First-pole-to-clear factor			1.3
7	Rated short-circuit breaking current		kA	50
8	Rated short circuit closing current (peak)		kA	125
9	Rated short circuit withstand current		kA	50
10	Rated peak withstand current		kA	125
11	Rated short circuit duration		s	3
12	Rated out-of-step breaking current		kA	12.5
13	Near fault breaking current		kA	90%lk,75%lk
14	Rated line charging opening and closing current		A	200
15	Rated operation sequence			0-0.3s-CO-180s-CO
16	Main circuit resistance		μΩ	≤ 55
17	Rated sulfur hexafluoride gas pressure (20℃ gauge pressure)		Mpa	0.6
18	Alarm/minimum functional pressure (20℃ gauge pressure)		Mpa	0.55±0.015/0.50±0.015
19	Annual air leakage rate of SF6 gases			≤ 0.5%
20	Gas moisture content (V/V)		ppm	≤ 150
21	Mechanical life			6000
22	Radio interference level		μV	＜ 500
23	Creepage distance	Fracture	mm	≥ 8660
23	Creepage distance	To earth	mm	≥ 6900
24	Weight of SF6 gas per unit		kg	24
25	Weight of circuit breakers per phase		kg	1500