LW36-126 SF6 Circuit Breaker

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Used in the AC 126kV/50Hz power systems, the LW36-126 SF6 circuit breaker is particularly suitable for breaking important loads. It can work not only as the control and protection switch in power transmission and distribution systems but also as the network interconnecting circuit breaker for control and protection of power systems.

With the biggest characteristic of low gauge pressure, this SF6 circuit breaker is able to operate properly at the temperature of -40℃.

Environmental Conditions

Ambient Temperature	40℃~ 40℃, Daily Temperature Difference ≤35℃
Altitude	≤1000m
Wind Speed	≤34m/s (Equivalent to 700Pa on Cylindrical Surface)
Sunlight Intensity	≤1000W/m2 (at Noon on Fine Day)
Monthly Average Relative Humidity	≤90%
Earthquake Acceleration	Horizontal≤0.2g Vertical≤0.1g
Ice Thickness	≤10mm
Air Pollution Degree	Not exceed the Level IV in GB/T5582
Installation Site	Indoors and Outdoors

Main Technical Parameters of SF6 Circuit Breaker

S/N	Item		Unit	Data
1	Rated Voltage		kV	126
2	Rated Power Frequency Withstand Voltage (1min)			Phase to Phase and Phase to Ground 230
				Break to Break 230 73*
3	Rated Lightning Impulse Withstand Voltage			Phase to Phase and Phase to Ground 550
				Break to Break 550 103*
4	Power Frequency Withstand Voltage When the Gauge Pressure of SF6 is Zero (5min)			Phase to Phase and Phase to Ground 95
				Break to Break 95
5	Rated Frequency		Hz	50
6	Rated Current		A	3150
7	Rated Short-circuit Breaking Current		kA	40
8	Rated Peak Withstand Current			100
9	Rated Short-time Withstand Current			40
10	Rated Short-circuit Closing Current			100
11	First-Pole-to-Clear Factor			1.5
12	Rated Short Circuit Duration		s	4
13	Rated Out-of-Phase Breaking Current (OP2)		kA	10
14	Short Line Fault Breaking Current		kA	36,30
15	Rated Circuit Charging Breaking Current		A	31.5
16	Rated Operating Sequence			O- 0.3s- CO- 180s- CO
17	Rated Pressure of SF6 Gas (Gauge Pressure at 20℃)		MPa	0.4
18	Warning/Locking Pressure (Gauge Pressure at 20℃)			0.36/0.32
19	Annual Gas Leakage Rate		%/Year	≤0.5
20	Moisture Content of Gas		PPM (V)	≤150
21	Mechanical Service Life		Times	6000
22	Radio Interference Level		μV	≤500
23	Making Time		ms	≤70
24	Electrical Service Life		Times	≥20
25	SF6 Gas Mass Used for Each Set		kg	7
26	Mass of Each Circuit Breaker			1500
27	Creepage Distance	Break to Break	mm	3150
		Break to Ground		3150

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Related Names
High Voltage Circuit Breaker | Electrical Switch

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