GCSLow-voltage Withdrawable Switchgear
Overview
GCS type low-voltage withdrawable switchgear (hereinafter referred to as the device) is designed and developed by the two joint design teams according to the requirements of the competent department of the industry, the majority of power users and design units. It meets the national conditions, has high technical performance indicators, and can adapt to the development of the power market. Low-voltage withdrawable switchgear that requires and can compete with existing imported products. The device has been widely used by power users. The device is suitable for power distribution systems in power plants, petroleum, chemical, metallurgy, textile, high-rise buildings and other industries. In large power plants, petrochemical systems, etc., where automation is high and the interface with the computer is required, the three-phase AC frequency is 50 (60) Hz, the rated working voltage is 380 (400, 600) V, and the rated current is 4000 A and below. Low-voltage power distribution equipment used for power distribution, motor centralized control, and reactive power compensation in power and power supply systems.
Product Standards
The design of the unit complies with the following standards: IEC439-1 Low-voltage switchgear and control equipment
GB7251 low voltage switchgear
JB 1T9661-1999 low voltage withdrawable switchgear
Model and meaning
The main technical parameters
bus bar
In order to improve the thermal stability of the busbar and improve the temperature rise of the contact surface, the device is all made of TMY-T2 series hard copper row, and the connection part of the copper row must be pressed and tinned. It is recommended to use full-length tin-tin. Full length silver plated copper busbars are also available.
Horizontal bus
The horizontal busbar is placed in the busbar compartment at the rear of the cabinet. 3150A and above are double-layer layout, 2500A and below are single-layer layout, each phase consists of 4 or 2 busbars, which greatly improves the short-circuit strength of the busbar.
The horizontal busbar of the device is selected as follows:
Vertical bus
The vertical busbar for the chest of drawers uses an "L" shaped hard copper tin busbar.
Neutral grounding bus
L-shaped busbar specifications
Hard copper row
(high x thick) + (bottom x thick)
Through horizontal neutral ground (PEN) or ground + neutral
(50x 5)+(30x5)
(PE+N) specifications are as follows
Rated current 1000A
*The specifications of vertical PEN line or PE +N line in the device are all 40x5
■Structural characteristics
1. The main frame of the device is made of 8MF steel, and the frame is assembled and partially welded. The main frame is equipped with a modulus hole E=20mm.
2. The functional rooms of the device are strictly separated, and the compartments are mainly divided into functional unit rooms, busbar rooms and cable rooms, and the functions of each unit are relatively independent.
3. The device adopts the latest design scheme of placing the horizontal main busbar behind the cabinet top or the cabinet, so that the cable compartment has upper and lower outlet passages. Solved the problem that the old product can't be on the line.
4. The dimensions of the cabinet are as follows
