Low‑voltage Switchgear_Low‑Voltage Complete Switchgear_Product

Low‑voltage Switchgear

GCS‑type Low‑voltage Withdrawable Switchgear is applied for power conversion, distribution and control in power, distribution, motor control centers and capacitor compensation of low‑voltage distribution systems in power plants, substations, petrochemical sectors, industrial and mining enterprises, high‑rise buildings, etc.

Product Overview

GCS‑type low‑voltage withdrawable switchgear boasts high making‑and‑breaking capacity, favorable dynamic and thermal stability, advanced and reasonable structure, flexible electrical schemes, high protection degree, safe and reliable performance, convenient maintenance and superior technical performance indicators.

This product complies with standards IEC60439‑1, GB7251.1, GB7251.12 and JB/T9661.

Technical Parameters

Project Name	Unit	Technical Parameters
Rated Frequency	HZ	50
Rated Voltage	V	400 380
Rated Insulation Voltage	V	690
Rated Current‑Horizontal Busbar	A	≤6300
Rated Current‑Vertical Busbar	A	≤4000
Rated Short-time Withstand Current‑Horizontal Busbar	KA	100
Rated Short-time Withstand Current‑Vertical Busbar	KA	65
Power Frequency Withstand Voltage	V/1min	1890
Protection Rating		IP40. IP30

* All products are custom‑made, and parameters are for reference only.

Normal Use Condition

Ambient air temperature: not higher than +40°C, not lower than ‑5°C, and the average temperature within 24 h shall not exceed +35°C.

Atmospheric conditions: clean air. Relative humidity shall not exceed 50% at maximum temperature of +40°C. Higher relative humidity is permitted at lower temperatures, e.g. 90% at +20°C. Moderate condensation may occasionally occur due to temperature variation.

Altitude: ≤2000 m.

For transportation and storage, the product is applicable within the temperature range of ‑25°C ~ +55°C; it can reach +70°C for a short‑term period (no more than 24 h). Under these limit temperatures, the equipment shall not suffer any irreversible damage and shall operate normally under service conditions.

If the above service conditions cannot be satisfied, the user shall notify the manufacturer at the time of order placement for negotiation.

This product can be designed to connect with computer interfaces to realize on‑line centralized monitoring and control of power system.

Product Features

Each functional compartment is strictly separated, mainly including functional‑unit compartment and cable compartment. Each unit operates independently without mutual interference.

Horizontal busbars are arranged horizontally at the rear of the cabinet to improve resistance against electrodynamic force generated by short‑circuit current.

Drawer types cover five size series: 1/2 unit, 1 unit, 3/2 unit, 2 unit and 3 unit, with rated circuit current up to 400 A.

A single equipment can be fitted with maximum 11 unit drawers or 22 half‑unit drawers.

The drawer has five clearly‑marked positions: OFF, ON, Test, Withdrawn and Isolated.

Each drawer is equipped with mechanical interlock device and emergency unlocking device.