LV Switchgear

GCS Low-Voltage Withdrawable Switchgear

GCS low-voltage withdrawable switchgear provides power distribution and centralised motor control for industrial and infrastructure projects. Its drawer-type units bring feeder and control circuits together in a compact assembly, allowing the cabinet lineup to accommodate the circuit mix required by the installation.

Designed for AC 400/660 V systems, the series offers current ratings up to 5,000 A and IP30 or IP40 enclosure options. Withdrawable-unit functions, control interfaces and cable access are configured to suit the electrical design and available switchroom space, with short-circuit ratings selected for the network fault level.

Technical Specifications

Rated Operating Voltage	AC 400 / 660 V
Rated Insulation Voltage	660 V
Rated Frequency	50 / 60 Hz
Horizontal Busbar Current	up to 5000 A
Vertical / Branch Busbar Current	1000 A (vertical MCC busbar)
Short-Time Withstand Current	50 / 80 kA (1 s) (main busbar)
Peak Withstand Current	105 / 176 kA (main busbar)
Power-Frequency Withstand Voltage	2.5 kV (1 min, main circuit); 2 kV (1 min, auxiliary circuit)
Enclosure IP Rating	IP30 / IP40
Standards	GB 7251 / IEC 439-1

Key Features

Withdrawable drawer units — high flexibility.
High current and short-circuit capacity.
For PC and MCC applications.
Compact, high component density.

Typical Applications

Power stations
Petrochemical, metallurgical and textile plants
High-rise buildings

Installation & Aftercare

Prepare the site, plan routine checks and keep service records.

What needs to be ready before installation?

Install in an indoor electrical room with a level foundation and working space for full drawer travel.
Coordinate top or bottom cable entry with the supplied lineup drawings; leave room for cable bends and outgoing terminations.
Provide room ventilation for the actual losses and control condensation around cable trenches and lightly loaded sections.

What should operators check during routine rounds?

Record section loading, overload trips and abnormal temperature indications, particularly where several motors operate together.

What is covered during planned maintenance?

During isolated servicing, inspect drawer contacts, secondary connections, interlocks and motor-control devices for wear, contamination or heat damage.
Clean ventilation openings and check fitted cooling devices; review protection settings whenever a motor or feeder duty changes.

Customization Options

Define the electrical configuration and the details needed for your site.

Circuit lineup: Incoming, bus-coupler, distribution and motor-control sections to the single-line diagram.
Busbars & fault duty: Main and vertical busbar ratings, neutral arrangement and verified short-circuit duty.
Protection & motor control: Breaker trip functions, motor-starting method, overload protection and control voltage.
Withdrawable units: Drawer sizes and circuit allocation, spare ways, secondary plugs and interlock requirements.
Cable entry & metering: Top or bottom cable routes, terminal space, metering points and requested communication interfaces.

Project-specific options and accessories are confirmed in the quotation and approved drawings.