The KYN28-12 (GZW-12) Series is an advanced metal-clad, air-insulated switchgear assembly designed for the control and protection of high-voltage power systems. Operating within the 3.6kV to 12kV range, this unit is engineered for three-phase AC 50/60Hz networks.

Known for its withdrawable circuit breaker design, the KYN28-12 allows for rapid maintenance and equipment replacement without de-energizing the entire busbar system. It is the industry standard for power plants, industrial substations, and high-rise commercial infrastructures that demand uncompromised reliability and operator safety.

• "Five-Prevention" Safety Interlock: Features a mandatory mechanical and electrical interlock system that prevents accidental operation, ensuring the circuit breaker cannot be moved while closed and the earthing switch cannot be engaged while live.

• Fully Withdrawable Design: The center-mounted vacuum circuit breaker (VCB) can be easily withdrawn to a "Test" or "Disconnected" position, providing a visible physical break for maintenance safety.

• High-Strength Al-Zn Coated Steel: The enclosure is constructed from imported aluminum-zinc coated steel sheets, CNC-processed for high precision and superior corrosion resistance without the need for additional painting.

• Compartmentalized Architecture: The cabinet is divided into four separate high-voltage compartments (Busbar, Circuit Breaker, Cable, and Instrument), localized any internal arc faults and preventing damage to adjacent sections.

• Large Current Capacity: Available in configurations ranging from 630A for branch circuits up to 4000A for main incoming feeders, catering to large-scale industrial loads.

1. Power Generation & Grid: Main switchgear for thermal, hydro, and wind power plants and secondary substations.

2. Industrial Manufacturing: Power hubs for steel mills, petrochemical plants, and large-scale mining operations.

3. Data Centers & Energy Storage: Reliable 12kV interface for BESS (Battery Energy Storage Systems) and high-density computing facilities.

4. Institutional Infrastructure: High-voltage distribution for international airports, metropolitan railways, and hospitals.

• Total Customization: We offer full integration with international vacuum circuit breaker brands including ABB (VD4), Schneider (EV12), and Siemens (SION), or our high-performance domestic series.

• Precision Busbar Engineering: Features heat-shrinkable insulated busbars with silver-plated contact surfaces to ensure minimal contact resistance and maximum thermal stability.

• Smart Grid Ready: Can be equipped with digital protection relays, RS485/Modbus communication modules, and real-time temperature monitoring for SCADA integration.

• Factory Routine Testing: Each cabinet undergoes partial discharge tests, mechanical operation tests, and power-frequency withstand voltage tests before shipment.

Q: Can the KYN28-12 be used for outdoor installations?

A: The KYN28-12 is an indoor-rated (IP4X) cabinet. For outdoor applications, it must be housed within a "Pre-fabricated Substation" (Power Container) or a specialized outdoor walk-in enclosure.

Q: What is the benefit of the Al-Zn coated steel versus traditional painted steel?

A: Al-Zn coating provides significantly higher corrosion resistance and better electrical conductivity for grounding the enclosure, which is critical for high-voltage safety.

Q: Is the switchgear compliant with IEC standards?

A: Yes, our KYN28-12 is fully compliant with IEC 62271-200, which governs metal-enclosed switchgear and controlgear for voltages up to 52kV.

KYN28A-12 Armored removable AC metal closed switchgear

This equipment is indoor metal armored with drawable switchgear (hereinafter referred to as switchgear). It is a complete power distribution device of 3.6-12KV three-phase AC 50Hz single bus and single bus segmented system, mainly used in power plants. Small AND medium-sized generators, power distribution of industrial and mining enterprises, as well as the secondary substation of the electric system, power receiving, power transmission and large high voltage motor starting. For the purpose of control protection and monitoring, the switch equipment meets IEC298, GB3906 and other standard requirements. It has the interlocking function of preventing the push-pull circuit breaker hand car with load, preventing the mistake of splitting and closing the circuit breaker, preventing the grounding switch from closing the circuit breaker when the grounding switch is in the closed position, preventing it from entering the live chamber, and preventing the mistake of closing the grounding switch when the power
is live. It can be equipped with VS1 vacuum circuit breaker, and it is a kind of performance distribution device.