Product Details

Specifications

High Voltage Circuit Breaker
LW35-72.5/126/145/252 SF6 circuit breaker high voltage
Simple Structure
Compactness

High Voltage Circuit Breaker

Main Features of High Voltage Circuit Breaker

LW35-72.5/126/145 circuit breaker is either three-phase gang operation with a sping mechanism or single-phase operation with three spring mechanism.

LW35-252 circuit breaker is equipped with three spring mechanisms to realize single-phase operation or three-phase electrical gang operation.

Ambient of High Voltage Circuit Breaker

LW35-72.5/126/145 LW35-252

Ambient air temperature -40~+40°C

Wind-pressure ≤700 Pa

Seismic level ≤9 degree

Altitude ≤3000 ≤2000 m

Technical Parameters of High Voltage Circuit Breaker

AMBIENT of High Voltage Circuit Breaker

Item	Unit	LW35-72.5	LW35-126	LW35-145	LW35-252
Rated Voltage	kV	72.5	126	145	252
Rated Current	A	3150			4000
Rated Frequency	Hz	50
Rated Short Circuit Breaking Current	kA	40			50

Ambient Condition

Main Technical Parameters

Item		Unit	LW35-72.5	LW35-126	LW35-145	LW35-252
Rated Voltage		kV	72.5	126	145	252
Rated Current		A	3150			4000
Rated Frequency		Hz	50
Rated Short Circuit Breaking Current		kA	40			50
Rated Short Time Withstand Current(3s)		kA	40			50
Short Line Fault Breaking Current		kA	30/36			45/37.5
Rated Peak Withstand Current		kA	100			125
Rated Out-of-phase Breaking Current		kA	10			12.5
Rated Line Charging Breaking Current		A	10	31.5	50	160
Rated SF₆ Gas Pressure(at 20°C)		MPa	0.4	0.5		0.6
Main Loop Resistance		µΩ	≤ 40	≤ 45		≤ 60
Operation Sequence			O-0.3s-CO-180s-CO
Mechanical Endurance		Times	10000
SF₆ Gas Leakage Rate(per year)		%	≤ 1
Moisture Content(V/V)		Ppm	≤ 150
Creepage Distance	Across the open contacts	MM	2300	3950	≥ 3950	7812
	To earth	MM	2300	3950	≥ 3950	7812

SF₆ Gas Pressure (at 20°C)

Item	Unit	LW35-72.5	LW35-126	LW35-145	LW35-252
Rated Working Pressure, P_N	MPa	0.4±0.015	0.5±0.015	0.5±0.015	0.6±0.015
Pre-filled Gas Alarming Pressure ₁	MPa	0.35±0.015	0.45±0.015	0.45±0.015	0.52±0.015