252KV high voltage SF6 circuit breaker

Product Detail

Description

LW43-252 High Voltage SF6 Circuit Breaker is a three-pole AC 50Hz outdoor high voltage switchgear. It is mainly used for the control and protection of 220kV power system, and can also be used as a contact circuit breaker.

Industry applications

LW43-252 High Voltage SF6 Circuit Breaker is a three-pole AC 50Hz outdoor high voltage switchgear. It is mainly used in 220kV power system.

control and protection, can also be used as a contact circuit breaker.

Features

Strong self-energy arc extinguishing and breaking ability.
The structure is simple.
An elongated spout is used, and a new filler is added to the material.
Long electrical life.
Strong carrying capacity.
Good insulation performance.
The seal structure is reliable.
Low radio interference voltage.
Low operating noise.
There is no oil leakage and air leakage in the mechanism.
Easy on-site installation.
Low amount of operation and maintenance.

Technical parameters

project	parameter
elevation	1000m		2000m
Ambient temperature	-30℃-40℃	-40℃-40℃	-30℃-40℃	-40℃-40℃
Rated voltage		252kV
Current rating		4000A
Rated short-circuit breaking current Isc	50kA	40kA	50kA	40kA
Rated short-circuit closing current (peak)	125kA	100kA	125kA	100kA
Rated short-time withstand current (RMS)	50kA	40kA	50kA	40kA
Near-zone fault interrupting current	IscX90%、IscX75% (kA)
Rated out-of-step interrupting current	IscX25% (kA)

1Min Power Frequency Withstand Voltage (RMS)	fracture	460、395+145 kV	460kV	460kV	460kV
1Min Power Frequency Withstand Voltage (RMS)	to the ground	460kV	460kV	460kV	460kV
Lightning impulse withstand voltage (peak)	fracture	1050、950+206 kV	1050kV	1050kV	1050kV
Lightning impulse withstand voltage (peak)	to the ground	1050kV	1050kV	1050kV	1050kV
Main loop resistance		≤55μΩ
Mechanical life		3000 times
Level of radio interference		〈500μV
Electrical life		16 times	20 times	16 times	20 times