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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
Item | Unit | LW35-72.5 | LW35-126 | LW35-145 | LW35-252 |
Ambient Temperature | °C | -40°C~+40°C | |||
Wind Pressure | Pa | ≤ 700 | |||
Altitude | m | ≤ 3000 | ≤ 2000 | ||
Seismic Level | degree | ≤ 9 | |||
Air Pollution Level | class | II~IV | |||
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, PN | 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 |