40.5kV Metal Enclosed High Voltage Switch Cabinet Indoor Power Distribution Unit

The KYN61-40.5(Z) is a premier indoor power distribution unit designed for three-phase AC 50/60Hz systems with a rated voltage of 40.5kV. It serves as the core control and protection hub for power plants, substations, and heavy industrial mining enterprises.

Engineered with an "Armored" structure, the KYN61 features a centrally-mounted Vacuum Circuit Breaker (VCB). This design optimizes the electric field distribution and allows for safer maintenance. Its primary function is to perform circuit switching, load control, and fault protection, ensuring the absolute stability of high-voltage transmission networks.

• Sophisticated Armored Compartmentalization: The cabinet is strictly divided into four independent compartments: the VCB Room, Busbar Room, Cable Room, and Relay/Instrument Room. This metal-clad isolation prevents fault propagation and ensures maximum operator safety.

• Precision Interlocking System: Equipped with a mandatory mechanical "Five-Proof" interlock. This prevents accidental entry into live compartments, ensures the circuit breaker can only be moved in the "Open" state, and prevents the grounding switch from being closed under load.

• Corrosion-Resistant Fabrication: The enclosure is constructed from high-quality aluminum-zinc coated steel plates, CNC-machined for high mechanical precision and superior resistance to oxidation and environmental wear.

• Optimized Insulation Clearance: Features air-insulation combined with high-performance epoxy resin insulators, maintaining excellent dielectric strength even in high-humidity or high-altitude environments.

• Flexible VCB Options: Compatible with leading vacuum circuit breakers, including the ZN85-40.5 or ABB’s VD4-40.5, allowing for seamless integration into existing utility specifications.

1. Utility Substations: Acting as the main 40.5kV distribution hub for regional grid stepping.

2. Renewable Energy Plants: Managing the high-voltage collection and transmission for large-scale wind farms and solar arrays.

3. Heavy Industry: Providing reliable power for steel mills, petrochemical plants, and large-scale mining operations.

4. Railway Infrastructure: Controlling the high-voltage feed for electric rail traction power stations.

• Factory-Direct Engineering: We eliminate the middleman, providing competitive B2B pricing while maintaining full control over material quality and testing protocols.

• Type-Tested Reliability: Every switch cabinet design undergoes rigorous type testing for internal arc faults, temperature rise, and mechanical endurance.

• Turnkey Customization: We provide fully customized internal configurations based on your Single Line Diagram (SLD), including CT/PT ratios, protective relay brands (SEL, Siemens, Schneider), and smart monitoring sensors.

• Expert Export Support: With years of experience in international logistics, we ensure the equipment is crated for sea freight and compliant with your local import standards.

Q: Is the KYN61-40.5 suitable for high-altitude installations?

A: Yes. For altitudes exceeding 1,000 meters, we adjust the insulation clearances and components to compensate for lower air density, ensuring full voltage rating compliance.

Q: Can the circuit breaker be operated remotely?

A: Absolutely. The unit can be equipped with electric motors for the circuit breaker truck and spring charging, allowing for full remote control and signaling via SCADA systems.

Q: What is the expected service life?

A: With regular maintenance, the KYN61 switchgear is designed for a service life of 30+ years in indoor industrial environments.

KYN61-40.5(Z) type armored removable AC metal closed switchgear (hereinafter referred to as the switchgear) is a three-phase AC 50Hz indoor complete power distribution unit with rated voltage of 40.5kV. As power plants, substations and industrial and mining enterprises to receive and distribute electrical energy. To the circuit control, protection and detection functions, but also can be used for frequent operation places. The switchgear conforms to GB/T11022-1999, GB3906-1991, DL404-1997 and other standards.

1. Ambient temperature: upper limit +40℃, and the average value measured within 24 hours does not exceed 35℃, lower limit -10℃.

2. Altitude: not more than 1000m

3. The relative temperature: the daily average does not exceed 95%, the monthly average does not exceed 90%.

4. Earthquake intensity: not more than 8 degrees.

5. Steam pressure: the daily average does not exceed 2.2kPa, the monthly average does not exceed 1.8kPa.

6. The surrounding environment: no fire, explosion danger, serious pollution, chemical corrosion and violent vibration of the place.