The GCK Series Low-Voltage Switchgear is a high-performance, fully withdrawable power distribution cabinet designed for AC 50/60Hz systems with rated voltages up to 690V. It is the industry-standard solution for Motor Control Centers (MCC) and main distribution boards in power plants, industrial factories, and large-scale commercial infrastructures.
The GCK system utilizes a modular "C-type" profile frame, allowing for high-density circuit integration. Each functional unit (drawer) is physically isolated, enabling maintenance or unit replacement without de-energizing the main busbar. This ensures maximum operational continuity and prevents the risk of internal arc propagation, making it essential for facilities where downtime is not an option.
Fully Withdrawable Modular Design: Functional units are housed in independent drawers with clear Connected, Test, and Disconnected positions. This allows for "hot-swapping" and rapid troubleshooting.
Mechanical Safety Interlocking: Equipped with a precision-engineered interlocking mechanism that prevents drawer movement while the circuit breaker is "ON," protecting operators from accidental arcing.
High-Conductivity T2 Copper Busbars: Features a main busbar system made of 99.9% pure T2 copper. Horizontal busbars are located at the top or rear, while vertical busbars are protected in flame-retardant enclosures.
Corrosion-Resistant Al-Zn Frame: The cabinet structure uses 2.0mm Al-Zn (Aluminum-Zinc) coated steel, offering superior mechanical rigidity and high resistance to oxidation in industrial environments.
Form 3b/4b Internal Separation: Physical partitioning between the busbar, functional units, and cable compartments ensures that a fault in one area does not affect the entire board.
| Feature | Detailed Specifications |
| Rated Operational Voltage (Ue) | AC 380V / 400V / 440V / 660V / 690V |
| Rated Insulation Voltage (Ui) | 1000V AC |
| Rated Current (In) | 630A up to 4000A / 6300A |
| Short-time Withstand (Icw) | 50kA / 80kA (1s) |
| Peak Withstand Current (Ipk) | 105kA / 176kA |
| Ingress Protection (IP) | IP3X, IP40 (Customizable up to IP54) |
| Standard Compliance | IEC 61439-1 & 2, GB 7251.12 |
Industrial Manufacturing: Heavy-duty motor control and power management for steel mills, cement plants, and chemical refineries.
Power Utilities: Primary and secondary distribution switchboards for hydroelectric, thermal, and renewable energy substations.
Critical Infrastructure: Centralized power hubs for international airports, wastewater treatment plants, and subway systems.
Commercial Real Estate: Reliable power distribution for landmark skyscrapers, luxury hotels, and Tier III/IV data centers.
Precision Contact Technology: All plug-in contacts are silver-plated to ensure minimal contact resistance and prevent thermal oxidation over decades of heavy use.
Bespoke Engineering: We build each cabinet to your specific Single Line Diagram (SLD). We integrate world-class circuit breakers from brands like ABB, Schneider, Siemens, or Chint.
Intelligent Monitoring Ready: Panels can be equipped with Modbus/Ethernet-enabled smart meters and protection relays for remote energy management and predictive maintenance.
Strict Quality Control: Every unit undergoes rigorous insulation resistance, dielectric withstand, and mechanical sequence testing before leaving our facility.
Q: What is the main difference between GCK and GCS switchgear?
A: GCK typically uses a mechanical drive for drawer movement and is highly cost-effective for industrial MCC applications. GCS and MNS models generally offer higher density and different busbar placements for high-end international projects.
Q: Can the busbar be placed on the top of the cabinet?
A: Yes. We offer flexible busbar configurations (top or rear-mounted) to accommodate your specific cable entry requirements (top or bottom entry).
Q: Is this switchgear suitable for high-vibration environments?
A: Yes. The modular frame is bolted and reinforced, making it suitable for seismic zones and heavy industrial sites where mechanical vibration is a concern.

GCK/GCS/MNS Low-voltage extraction switchgear complete set of switchgear is suitable for AC 50Hz, rated working voltage 380V low-voltage distribution system. It contains the functions of power center (PC) and motor control center (MCC), the technical parameters are up to the national standards, with beautiful appearance, high electrical performance, high protection level, safe and reliable,easy maintenance and other characteristics, is the metallurgy, petroleum, chemical, electric power, machinery, light textile and other industries low-voltage power supply system distribution device.
This product conforms to IEC-439, GB7251.1 standard.
The altitude does not exceed 2,000 meters above sea level.
1, the ambient air temperature is not higher than +40℃, not lower than -5℃, and the average temperature within 24 hours is not higher than +35℃.
2, atmospheric conditions: the air is clean, the relative humidity at the temperature of +40 DEG C is not more than 50%, the
temperature is low to allow a higher relative humidity, such as +20 DEG C is 90%.
3, no fire, explosion danger, serious pollution, chemical corrosion and violent vibration of the place.
4. Tilt with vertical plane not more than 5°.
5, the control center is suitable for the following temperature transport and storage process: -25℃ ~+55℃, in a short time (not more than 24h) not more than +70℃.























