GW8 neutral point high voltage isolation switch

Introduction

GW8 neutral point isolation relationship single-phase AC 50Hz high voltage switchgear, rated current: 630A, 1250A. In the case of voltage and no load, it is used for the neutral point grounding of the transformer. It is also used when the railway automatically blocks the letter device. It can be used in single stage. The anti-fouling type isolating switch can meet the requirements of users in heavy pollution areas, and can effectively solve the problem of pollution flashing that occurs in the operation of the isolating switch.

Model Description

This product is divided into two types: ordinary type and anti-fouling type (W); the operating mechanism used in this product is: CS8-5 type manual operation mechanism or CX6 type motor operation mechanism; CS17-G type manual operation mechanism Or CJ2, CJ5, CJ6, CJ12 type motor operating mechanism.

Use characteristics

Altitude no more than 1000m (special requirements are available); ambient air temperature: upper limit +40°C lower limit -25°C; wind pressure not exceeding 700Pa (equivalent to wind speed 34m/s); seismic intensity not exceeding 8 degrees; ice thickness 10mm Air pollution level: 0 (normal), II, III (stain-resistant). This series of isolating switch meets the requirements specified in GB1985-89 "AC high voltage isolating switch" IEC129 (1984) "AC disconnector grounding switch" and IEC694 (1980) "High voltage switchgear and control equipment sharing clause".

Characteristics

Main technical parameters of GW8 neutral point high voltage isolation switch

Name GW8-40.5 GGW8-72.5 GGW8-126G
Rated voltage kV 40.5 72.5 126
The highest voltage kV 40.5 40.5 126
Rated current kA 630,1250 630,1250 630,1250
Rated peak withstand current kA 50,80 50,80 50,80
Rated short-time withstand current kA 20,31.5 20,31.5 20,31.5
1min power frequency withstand voltage kV 90 155 230
Terminal rated static tensile force N 500 500 500

Principle and structure of GW8 neutral point high voltage isolation switch

The isolating switch is composed of a base, a post insulator and a conductive part. A static contact and a connecting plate connecting the bus bar are arranged above the insulating strut, and a base, a moving contact, an operating arm, and an operation are arranged between the strut insulator and the insulating strut. The insulator and the operating mechanism are connected to the movable contact through the connecting rod, the operating insulator, and the operating arm.