LW9-72.5kV Outdoor High Voltage SF6 Circuit Breaker

Introduction

LW9-72.5 porcelain column high voltage AC sulfur hexafluoridecircuit breaker is a new product,which adopts spring operating mechanism and three poles are installed on one frame to realize three-phase mechanical linkage through transmission mechanism.Electronic controlling can achieve remote and local operation, product performance is more superior. operating noise is small. It has the ability to break capacitive load and inductive load current,It can be used as a special circuit breaker for reactive power compensation.

Basic Information

Type: LW9‑72.5 (also marked as LW9‑66kV)

Rated Voltage: 72.5 kV

Rated Frequency: 50 Hz

Phase: 3-pole, three poles mounted on one frame with mechanical linkage

Structure: Porcelain column type, single break, self-energy arc extinction

Operating Mechanism: CT20 spring mechanism, motor energy storage, local and remote operation available

Application: Outdoor substation, transmission line protection and tie breaker

Features

1. Excellent capacitive and inductive current breaking performance;

2.Longer electrical life;

3.Reliable insulation performance;

4. Longer mechanical life;

5. Safe and reliable operation, small maintenance workload.

Technical Parameters

Rated Current: 1250A / 1600A / 2000A / 2500A / 3150A

Rated Short-circuit Breaking Current: 20kA / 31.5kA / 40kA

Rated Short-time Withstand Current: Same as breaking current, duration 4s

Rated Peak Withstand Current: 80kA (31.5kA level)

SF₆ Gas Pressure at 20℃: 0.4 MPa (rated) / 0.3 MPa (alarm) / 0.2 MPa (lockout)

Insulation Level:

Power Frequency Withstand Voltage (1min, to earth): 160 kV (rms)

Lightning Impulse Withstand Voltage (to earth): 350 kV (peak)

Dimension