Overview

GCS low-voltage withdrawable switchgear (hereinafter referred to as the device) is developed by the former Ministry of Machinery and the joint design team of the Ministry of Electric Power according to the requirements of the competent department of the industry, the majority of power users and design units, in line with national conditions, with high technical performance indicators, able to adapt A low-voltage withdrawable switchgear that requires the development of the electricity market and can compete with existing imported products. The device passed two co-hosted appraisals in Shanghai in July 1996 and was valued and affirmed by the manufacturing and manufacturing units and the power usage department.

The device is suitable for power distribution systems in power plants, petroleum, chemical, metallurgy, textile, high-rise buildings and other industries. In large-scale power plants, petrochemical systems, etc., where automation is high, and the interface with the computer is required, as a three-phase AC 50 (60) Hz, rated working voltage 380V, rated current 4000A and below, power distribution and power supply in the power supply system Low-voltage power distribution unit for centralized control and reactive power compensation.

The device complies with IEC439-1 and GB7251.1-97 standards.

 

Characteristics

◆The main frame adopts 8MF steel. The two sides of the steel have φ9.2mm mounting holes with modulus of 20mm and 100mm respectively. The internal installation is flexible and convenient.

◆ The main frame assembly form is designed as two types, fully assembled structure and part (side frame and beam) welded structure for users to choose.

◆ The functional rooms of the device are isolated from each other, and the compartments are divided into functional unit rooms, busbar rooms and cable rooms. The role of each chamber is relatively independent.

◆The horizontal main busbar adopts the rear arrangement of the cabinet to enhance the ability of the busbar to resist electric power, which is the basic measure to make the main circuit of the device have high short-circuit strength.

◆The design of the cable compartment makes it easy to access the cable up and down.

 

  The main technical parameters

◆Main circuit rated voltage (V)

Exchange 380 (400), (660)

◆Auxiliary circuit rated voltage (V)

Exchange 220, 380 (400)

DC 110, 220

◆Rated frequency (Hz) 50 (60)

◆Rated insulation voltage (V) 660 (1000)

◆Rated current (A)

Horizontal busbar ≤4000

Vertical Bus (MCC) 1000

◆ Busbar rated short-time withstand current (kA/ls) 50.80

◆ Busbar rated peak withstand current (kA/0.ls) 105.176

◆Power frequency test voltage (v/Imin)

Main circuit 2500

Auxiliary circuit 1760

◆Bus

Three-phase four-wire system A.B.C.N

Three-phase five-wire system A.B.C.PE.N

◆Protection class IP30, IP40

 

Normal use environmental conditions

◆The ambient air temperature is not higher than +40 ° C, not lower than -5 ° C, and the average temperature within 24 h is not higher than +35 ° C.

◆ Relative humidity does not exceed 50% at the highest temperature, and allows higher relative humidity at lower temperatures, for example, 90% at +20 °C, but temperature changes should be considered, and occasionally moderate condensation may occur. dew.

◆ The altitude does not exceed 2000 meters.

◆The installation tilt does not exceed 50.

◆ Indoors where there is no dust, corrosive gas and rain.

 

Internal structure