LV Switchgear

GCK Low-Voltage Withdrawable Switchgear

GCK low-voltage withdrawable switchgear combines power distribution and motor control in drawer-type functional units. Designed for industrial power centres and motor control centres, it groups feeder and motor-starter circuits within a common assembly. Individual units can be withdrawn for inspection or replacement in accordance with the equipment's operating procedures.

The documented configuration serves AC 400/660 V systems, with horizontal busbars up to 5,000 A and 50 or 80 kA short-time withstand ratings for 1 second. IP30 and IP40 enclosures are available. Incoming circuits, feeders, protection and controls follow the project single-line diagram.

Technical Specifications

Rated Operating Voltage	AC 400 / 660 V
Rated Insulation Voltage	660 / 1000 V
Rated Frequency	50 Hz
Horizontal Busbar Current	up to 5000 A
Vertical / Branch Busbar Current	630 / 1000 / 1250 / 1600 A (branch busbar)
Short-Time Withstand Current	50 / 80 kA (1 s) (main busbar)
Peak Withstand Current	up to 176 kA (main busbar)
Enclosure IP Rating	IP30 / IP40
Standards	GB 7251.1-2005 / IEC 60439.1-1992

Key Features

Drawer-type functional units.
High current capacity.
Flexible configuration.
For PC & MCC applications.

Typical Applications

Steel rolling mills and petrochemical plants
Ports and docks
Hotels and large buildings

Installation & Aftercare

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

What needs to be ready before installation?

Catalogue normal conditions: indoor ambient -5 to +40 °C, 24-hour average at most +35 °C, altitude at most 2000 m.
Provide a level base, front drawer-handling space and cable routes that remain accessible after the lineup is connected.
At +40 °C, catalogue relative humidity is limited to 50%; control condensation and exclude conductive dust or corrosive gases.

What should operators check during routine rounds?

Review feeder loading and trip indications during rounds; look for blocked ventilation, condensation and abnormal operating noise.

What is covered during planned maintenance?

At planned isolation, qualified personnel inspect drawer power contacts, secondary plugs, interlocks and cable terminations for wear or overheating.
After a fault or stiff drawer operation, inspect the affected unit before reuse; use the specified contact-care products and procedure.

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.