The KYN28 Series Medium Voltage Switchgear is a high-performance, air-insulated power distribution center designed for the control and protection of 10kV to 24kV electrical systems. This metal-clad, withdrawable assembly is engineered for three-phase AC 50/60Hz networks, providing a robust interface between the utility grid and industrial loads.

By utilizing a center-mounted withdrawable circuit breaker, the KYN28 allows for rapid maintenance and equipment testing without disrupting the entire busbar system. It is the preferred choice for secondary substations, manufacturing plants, and high-security infrastructure projects that demand the highest levels of operational continuity and operator safety.

• "Five-Prevention" Mechanical Interlocks: Features a mandatory safety system that prevents accidental closing of the breaker, prevents the breaker from moving while under load, and ensures the earthing switch cannot be engaged while the system is live.

• Fully Compartmentalized Safety: The cabinet is divided into four grounded, arc-proof compartments (Busbar, VCB, Cable, and Low Voltage/Instruments). This design localizes any internal faults and prevents catastrophic spread to adjacent units.

• Superior Corrosion Resistance: Constructed from Al-Zn (Aluminum-Zinc) coated steel sheets, providing exceptional protection against oxidation and chemical exposure while maintaining excellent grounding conductivity.

• High-Precision VCB Integration: Optimized for use with the VS1 or VD4 (ABB) vacuum circuit breakers. The withdrawable "truck" design ensures perfect alignment with the primary stationary contacts every time.

• Arc-Resistant Construction: The heavy-duty frame is engineered to withstand the thermal and pressure stresses of an internal arc, protecting nearby personnel.

1. Industrial Substations: Main power hubs for textile mills, chemical processing plants, and automotive factories.

2. Commercial Real Estate: Managing 10-24kV incoming power for airports, hospitals, and high-rise data centers.

3. Renewable Energy: Collector switchgear for wind farms and large-scale solar PV installations.

4. Utility Grids: Reliable secondary distribution for urban power grid transformations.

• Turnkey Customization: We offer a wide range of protection relay options (SEL, Schneider, or ABB) and can customize the cabinet dimensions to fit existing substation footprints.

• High-Grade Insulation: All primary busbars are sleeved with heat-shrinkable insulation material and feature silver-plated copper connections to minimize thermal loss.

• Smart Monitoring Ready: Units can be equipped with real-time temperature sensors, humidity controllers, and remote Modbus/RS485 communication modules for SCADA integration.

• Rigorous Testing: Every cabinet undergoes 100% factory routine tests including partial discharge, mechanical operation, and dielectric withstand tests before shipment.

Q: Can this unit handle 24kV applications safely?

A: Yes. While many KYN28 units are sold for 12kV, our specialized 24kV KYN28 uses enhanced insulation distances and superior dielectric materials to meet the rigorous BIL (Basic Insulation Level) requirements of 24kV grids.

Q: Does it include the vacuum circuit breaker?

A: We can supply the cabinet as an "empty" enclosure for local integrators or as a fully populated, wired unit with your choice of VS1, VD4, or EV12 circuit breakers.

Q: What is the lead time for a custom 10-cabinet lineup?

A: Standard custom orders typically ship within 4–6 weeks from final drawing approval, depending on the complexity of the protection relays required.

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.

1. Normal conditions
a. Ambient air temperature: upper limit, +40℃ lower limit, -10℃
b. Altitude: 1000M
c. Relative ambient humidity: the average daily relative humidity is no more than 95%, and the average monthly relative humidity is no more than 90%;
d. Earthquake: intensity does not exceed 8 degrees.
e, the surrounding air should be free from corrosive or combustible gases, water vapor and other obvious pollution.
f. No serious pollution and frequent violent vibration, and the severity design meets the requirements of class 1 under harsh conditions.
2. Special working conditions: * When it is used under the normal environmental conditions stipulated in GB3906, it shall be negotiated by the user and the manufacturer.