Outdoor HV Dead Tank SF6 Gas Circuit Breaker LW24-126 LW24-145 LW24-252

Product Description

Outdoor High Voltage Porcelain Type SF6 Gas Power Circuit Breaker for Substation. Product Description 1.General Type LW24- /T outdoor H.V. A.C. dead tank SF6 gas circuit breaker is a new kind of circuit breaker with self-blast interrupter and spring operating mechanism, developed by Xi'an XD High Voltage Apparatus Co.,Ltd. (former Xi'an High Voltage Apparatus Works), on the basis of technology of product imported from Mitsubishi, Japan.The latest achieve-arc extinguishing principle of gas-blast pressure adapting with breaking-current is employed,by which most of energy required for breaking rated short-circuit current are acquired from arc itself.Therefore, the demand for operating power is reduced signifcantly. The three pole interrupters are placed inside three metal enclosures respectively. The circuit breaker can be mechanically three-phase gang-operated. Both remote electrical control and local manual control can be real- ized. Type CT20-II spring operating mechanism, provided with the product, is a kind of mechanism with low operating power, minimum maintenance work needed and high reliability. The product reaches international advanced level in the respect of main technical performance.
2.Normal Service Conditions 2.1.Altitude: ≤3000m 2.2.Humidity monthly: ≤90% 2.3.Max .wind velocity: ≤35m/s 2.4.Pollution class: IV class 2.5.Ambient air temperature: -35ºC~40ºC(It's satisfed under condition of -40ºC in heavy cold area) 2.6.Max .temperature difference daily: 25K 2.7.Earthquake withstand density: 9 degree 2.8.Ice coating: ≤10mm 2.9.Max. radiance from sun: 1000 W/m2 Note: When product is used under the condition out of above range, user and manufacturer shall consult to confrm. Product Parameters

No	Item	Unit	LW24-40.5	LW24-72.5	LW24-125T LW24-145T		LW24-252/T
1	Rated Voltage	kV	40.5	72.5	126	145	252
2	Rated Normal Current	A	3150				4000
3	Rated Frequency	Hz	50
4	Rated Short Circuit Breaking Current	kV	40	40	40	31.5	50
5	Rated Short-Time Withstand Currend And Duration	kV	40 (4s)	40 (4s)	40 (3s)	31.5 (3s)	50 (3s)
6	Rated Peak Whithsand Current	kV	100	100	100	80	125
7	Rated Making Current (Peak)	kV	100	100	100	80	125
8	Rated Short Time Power Frequency Withstand Voltage(Rms)
	Between Breaks	kV	95+23.4	160+42	315		460+145
	To Earth	kV	95	160	275		460
9	Rated Lightning Impulse Withstand Voltage
	Between Breaks	kV	185+33	350+59	650+100		1050+200
	To Earth	kV	185	350	650		1050
10	Creepage Distance	mm/kv	31	31	25, 31
11	Breaking Time	ms	≤60	≤60	≤60
12	Opening Time	ms	≤30	≤30	≤30
13	Closing Time	ms	≤100	≤100	≤100
14	Mechanical Endurance	Tim	1000		≤5000
15	Rated Operation Sequence
16	Rated Pressure Of SF6 Gas (at20ºC)	MPa	0.50, 0.40		0.5		0.60
17	Alarm/Lock Pressure Of SF6 Gas	MPa	0.45, 0.40; 0.35/0.30		0.45/0.40		0.55/0.50
18	Rated Voltage Of Control Circuit	V	DC220/110
19	Rated Voltage Of Energy-Store Motor Circuit	V	DC220/110, AC220
20	Breaking Number Of Rated Short-Circuit Breaking Current	Time	20
21	Rated Back-To-Back Capacitor Back Breaking Current	A	1500	2000
22	Rated Shunt Reactor Switching Current	A	1600	1500

CT	Datasheet
NO	Transformation Ratio	Accuracy	Output Capacity
1	100-2000	0.5 class	10VA-50VA
2	200-2000	0.2 class	5VA-50VA
3	100-2000	10P10	10VA-50VA
4	200-2000	10P15	10VA-50VA
5	200-2000	10P20	5VA-50VA

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