GCS type low-voltage withdrawable switchgear (hereinafter referred to as the device) is a low-voltage withdrawable switchgear designed and developed by two joint design teams according to the requirements of industry authorities, the majority of power users and design units, which is in line with national conditions, has high technical indicators, can meet the needs of the development of the power market and can compete with the existing imported products. At present, GCS type low-voltage withdrawable switchgear has been widely used by power users. The device is suitable for power distribution systems in power plants, petroleum, chemical, metallurgy, textiles, high-rise buildings and other industries. In large power plants, petrochemical systems and other places with high degree of automation and computer interface, it is used as a low-voltage complete set of power distribution equipment for power generation and power supply systems with three-phase AC frequency of 50(60)Hz, rated working voltage of 380V(400), (600), rated current of 6300A and below, centralized control of motors, and no power compensation.

　　1. Overview

GCS type low-voltage withdrawable switchgear (hereinafter referred to as the device) is a low-voltage withdrawable switchgear designed and developed by two joint design teams according to the requirements of industry authorities, the majority of power users and design units, which is in line with national conditions, has high technical indicators, can meet the needs of the development of the power market and can compete with the existing imported products. At present, GCS type low-voltage withdrawable switchgear has been widely used by power users.

　　2. Scope of Use and Purpose

The device is suitable for power distribution systems in power plants, petroleum, chemical, metallurgy, textiles, high-rise buildings and other industries. In large power plants, petrochemical systems and other places with high degree of automation and computer interface, it is used as a low-voltage complete set of power distribution equipment for power generation and power supply systems with three-phase AC frequency of 50(60)Hz, rated working voltage of 380V(400), (600), rated current of 6300A and below, centralized control of motors, and no power compensation.

　　3. Model Meaning

　  4. performance indicators

The device is designed to meet the following criteria

BG7251 Low Voltage Switchgear Set

IEC439-1 low-voltage switchgear and controlgear assemblies

ZBK36001 low-voltage draw-out switchgear

　　5. product features

The heat capacity of the adapter is improved, and the additional temperature rise caused by the temperature rise of the adapter, cable head and spacer plate is greatly reduced.

The separation between functional units and compartments is clear and reliable, and the work of other units is not affected by the failure of one unit, so that the failure is limited to a minimum range.

The busbar is arranged horizontally so that the device has good dynamic and thermal stability and can withstand the impact of 80/176KA short-circuit current.

The number of circuits for single cabinet of MCC cabinet is up to 22, which fully considers the needs of automatic electric door (machine) groups in large single-machine capacity power plants, petrochemical systems and other industries.

The connection of the device to the external cable is completed in the cable compartment, and the cable can be brought in and out up and down. The zero-sequence current transformer is installed in the cable compartment, making it easy to install and maintain.

In the same power distribution system, the short-circuit current can be limited by the current limiting reactor matching, the bus voltage can be stabilized at a certain value, and the requirements for short-circuit strength of components can be partially reduced.

The drawer unit has a sufficient number of secondary connectors (32 pairs for unit 1 and above, 20 pairs for unit 1/2.) It can meet the requirements of computer interface and automatic control circuit for the number of contacts.

　　6. Ordering Instructions

The ordering contract includes the following:

1. The full model of the product includes the main circuit scheme number and the auxiliary circuit scheme number;

2. Main circuit system combination sequence diagram;

3. Electrical schematic diagram of auxiliary circuit;

4. List of components in the cabinet;

5. Setting parameters such as voltage, current and time in the circuit;

Other special requirements inconsistent with the normal use of the product.