GCK Type Low Voltage Withdrawable Switchgear
The GCK and GCL series low-voltage withdrawable switchgears are independently designed by our company in response to the diverse needs of users. Featuring advanced structure, aesthetic appearance, excellent electrical performance, high protection class, reliable safety and convenient maintenance, they are ideal power distribution equipment for low-voltage power supply systems in industries such as metallurgy, petroleum, chemical engineering, electric power, machinery and textile.
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The GCK and GCL series low-voltage withdrawable switchgears are independently designed by our company in response to the diverse needs of users. Featuring advanced structure, aesthetic appearance, excellent electrical performance, high protection class, reliable safety and convenient maintenance, they are ideal power distribution equipment for low-voltage power supply systems in industries such as metallurgy, petroleum, chemical engineering, electric power, machinery and textile.
The products have been listed by the state as recommended products for the renovation of urban and rural power grids and included in the 9th batch of energy-saving products.
Model Explanation

Scope of Application:
The GCK1, GCL1, and GCJ1 series are designed for low-voltage power distribution systems with 50Hz AC and a rated operating voltage of 380V to 660V. They are used for power receiving, feeding, busbar connection, lighting, motor control, and power compensation. Integrating the functions of Power Centers (PC) and Motor Control Centers (MCC), they are suitable for power distribution and power control in industrial and mining enterprises, high-rise hotels, airports, hospitals, and other facilities.
Operating Conditions:
Altitude: Not exceeding 2000m.
Ambient air temperature: Maximum +40°C, with an average temperature not exceeding +35°C within any 24-hour period; minimum -5°C.
Atmospheric conditions: Clean air. Relative humidity ≤ 50% at +40°C; higher humidity is allowed at lower temperatures (e.g., 90% at +20°C).
Installation site: Free from fire, explosion hazards, severe pollution, chemical corrosion, and severe vibration.
Inclination from vertical: Not exceeding 5°.
Transportation and storage temperature range: -25°C to +55°C, with a short-term (≤24 hours) maximum of +70°C.
If the above operating conditions cannot be met, the customer should propose this to our factory at the time of ordering for negotiation and resolution.
Main Technical Parameters:
Rated Insulation Voltage |
660V |
Rated Operating Voltage |
380V, 660V |
Rated Voltage of Auxiliary Circuit |
AC: 200V, 380V; DC: 110V, 220V |
Operating Frequency |
50~(60)Hz |
Rated Current |
Horizontal busbar: <3150A; Vertical busbar: 630A, 800A |
Rated Short-time Withstand Current |
105kA/1s (main busbar), 30kA/1s (neutral busbar) |
Rated Peak Withstand Current |
105kA/0.1s, 50kA/0.1s |
Breaking Capacity of Functional Unit (Drawer) |
50kA (RMS) |
Enclosure Protection Degree |
IP30, IP40 |
Busbar Arrangement |
Three-phase four-wire system, Three-phase five-wire system |
Conformed Standards |
IEC-439, BS5486, VDE0660, GB7251, NEMA IC2-322, JJB/T9661 |
Operation Mode |
Local, Remote, Automatic |