The KYN28-12 and KYN61-40.5 Series are the industry standards for indoor metal-clad, removable switchgear. Designed for 3-phase AC 50/60Hz power systems, these cabinets provide primary distribution, protection, and monitoring for power plants, substations, and industrial manufacturing facilities.

The core of the system features a removable vacuum circuit breaker (VCB) mounted on a central trolley, allowing for rapid maintenance and easy isolation without de-energizing the entire busbar. With a focus on "Five-Prevention" interlocking safety, these cabinets ensure that operational errors are physically impossible, protecting both personnel and high-value equipment from catastrophic failure.

• Metal-Clad Compartmentalized Design: The cabinet is strictly divided into four independent compartments: Busbar, Circuit Breaker (Trolley), Cable, and Low Voltage (Relay). This ensures that a fault in one section is contained and does not spread.

• "Five-Prevention" Safety Interlocks: Includes mandatory mechanical and electrical interlocks to prevent:

  1. Closing the breaker while in the test/disconnected position.

  2. Opening/Closing the earth switch with the breaker energized.

  3. Moving the trolley while the breaker is closed.

  4. Accidental entry into energized compartments.

• High-Strength Al-Zn Coated Steel: The enclosure is constructed from imported aluminum-zinc coated steel plates, which are CNC-processed and bolted for maximum structural rigidity and superior corrosion resistance.

• Vacuum Arc Quenching: Equipped with high-reliability Vacuum Circuit Breakers (like the VD4 or VS1 series) for maintenance-free interruption and long electrical life.

• Pressure Relief Vents: Each high-voltage compartment is equipped with top-mounted pressure relief flaps to safely vent gases in the event of an internal arc fault.

1. Main Substations: Serving as the primary incoming and outgoing protection for 11kV - 33kV utility networks.

2. Power Plants: Centralized control and protection for thermal, hydro, and wind power generation assets.

3. Industrial Heavyweight Facilities: Providing reliable power for steel mills, petrochemical plants, and large-scale mining operations.

4. Commercial Infrastructure: Secure power distribution for airports, metropolitan subways, and data centers.

• Fully Factory-Tested: Each cabinet undergoes rigorous routine tests including power frequency withstand, mechanical operation, and primary circuit resistance before shipping.

• Modular Expandability: The busbar design allows for easy expansion on either side, enabling the system to grow as your facility’s load demand increases.

• Smart Integration: Compatible with modern digital protection relays (ABB REF, Schneider Micom, etc.) for real-time SCADA communication and automated fault recording.

• Zero-Maintenance Busbars: High-conductivity copper busbars are heat-shrink sleeved and supported by epoxy resin insulators to prevent flashovers.

Q: Can these cabinets be used in high-altitude environments?

A: Yes. For installations above 1000m, we adjust the insulation clearances and components to compensate for reduced air dielectric strength.

Q: Does it support remote operation?

A: Absolutely. The circuit breaker trolley and the breaker itself can be equipped with motorized drives for remote racking and switching from a safe control room.

Q: Is the trolley compatible with different brands of VCBs?

A: Our standard trolley is designed for the VS1 series, but we can customize the interface to support ABB’s VD4 or Siemens’ SION breakers upon request.