220kv High Voltage Live Tank Circuit Breaker

Model NO.: LW58-252 Operation: Electric Type Arc-extinguishing Medium: SF6 Structure: ELCB Type: Circuit Breaker Certification: VDE, ISO9001-2000, CE, UL, CB, CCC Specification: IEC Breaking Capacity: High Voltage Circuit Breakers Speed: Normal Type Circuit Breaker Installation: Fixed Poles Number: 3 Function: Conventional Circuit Breaker Trademark: Tianan Electric Origin: Ningbo, China LW58-252/T4000-50 outdoor self-contained power high voltage SF6 circuit breaker is suitable for the electric power system of AC 50Hz and 252kV, which is the control and protection equipment for  the electric power system, as well as for circuit breaker connection.
The product uses SF6 gas as the arc extinguishing and insulation medium, adopting the self-contained power arc extinguishing double action type interrrupter structure technique, equipped with new-tyoe spring operating mechanism, with features of strong switching ability, less opearting power, and high reliability, the technical inidcators have reached similar products in domestic and international advanced level.
Single phase SF6 circuit breaker, which is operated by one mechanism for one pole, is changed to three-phase mechanical linkage circuit breaker which is operated by one mechanism, The decrease of mechanism improves the linkage reliability for three phase SF6 circuit breaker to avoid lack of phase opeartion.

Serial No.	Name	Unit	Value
1	Rated voltage		252
2	Rated power frequency withstand voltage (1min)
2.1	To earth	kV	460
2.2	Across open contact	kV	460+146
3	Rated lightning impulse withstand voltage
3.1	To earth	kV	1050
3.2	Across open contact	kV	1050+206
4	Rated frequency	Hz	50
5	Rated curent	A	4000
6	Rated short-circuit breakering current (Isc)	kA	50
7	Rated short-circuit making current (peak)	kA	125
8	Rated short-time withstand current	kA	50
9	Rated peak withstand current	kA	125
10	Rated duration of short-circuit	s	3
11	Rated out of phase breaking current	kA	12.5
12	Short-line fault breaking current	kA	90%Isc,75%Isc
13	Rated operating sequence		o-0.3s-CO-180s-CO
14	Number of rated short-circuit breaking current	times	20
15	First pole to clear factor		1.3
16	Rated line charging making current	A	200
17	Rated SF6 gas pressure (20ºC gauge pressure)	Mpa	0.6/0.7 (SF6+CF4)
18	Annual leakage of SF6 gas	%	≤0.5
19	Gas humidity content (L/L) (20ºC at handover)	L/L	≤150x10-6
20	Mechanical endurance	Times	6000
21	Opening time	ms	30+/-5
22	Closing -opening time	ms	≤100
23	Creepage distance	mm	≥8660
24	Weight of SF6 gas filled for each CB	kg	10
25	Weight of one set of CB	kg	1800

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Product Categories : HV-Circuit Breaker