Medium Voltage distribution panel
The KYN61-40.5(Z) is a 40.5kV rated indoor metal-clad withdrawable switchgear, designed for three-phase AC 50Hz indoor complete power distribution equipment. It adopts a modular assembly structure and is primarily used in the power distribution rooms of power plants, substations, and industrial and mining enterprises for receiving and distributing electrical energy, as well as controlling, protecting, and monitoring circuits. This product complies with GB, DL, and IEC standards and incorporates a comprehensive "Five Prevention" interlocking function, making it suitable for general power systems and frequently operated sites.
Detailed Technical Specifications
Parameter Category | Technical Specifications |
Rated Characteristics | Rated Voltage: 40.5kV |
Insulation Level | 1min Power Frequency Withstand Voltage: 95kV |
Short-circuit Characteristics | Rated Short-circuit Breaking Current: 20kA, 25kA, 31.5kA |
Mechanical Characteristics | Protection Degree: Enclosure IP3X, Between compartments/Circuit Breaker Compartment door open IP2X |
Control Circuit | Rated Voltage: DC 24/36/48/60/110/220V, AC 110/220V |
Compliance Standards | GB3906, GB/T11022, DL404, IEC62271-200, IEC298 |
Key Product Features
1.Excellent Structure and Materials
The enclosure is made of high-quality aluzinc steel plates or cold-rolled steel, processed by CNC machines and bent, then assembled using bolt connection or riveting, offering high precision, corrosion resistance, oxidation resistance, and high mechanical strength. The entire cabinet can be weld-free.
The metal-clad withdrawable structure divides the cabinet into four separate compartments: circuit breaker compartment, busbar compartment, cable compartment, and relay & instrument compartment, isolated by metal partitions with a high protection degree.
Floor-type movable truck design. The truck frame is equipped with a screw nut drive mechanism and an overrunning clutch, allowing easy movement of the truck and preventing damage to the mechanism due to misoperation.
2.Outstanding Electrical Performance and Safety
Can be equipped with new composite insulation vacuum circuit breakers (e.g., ZN85-40.5, VD4-40.5, etc.), featuring good interchangeability and simple replacement.
Comprehensive "Five Prevention" mechanical interlocking functions effectively prevent misoperation and ensure the safety of equipment and personnel:
Prevent moving the breaker truck while energized
Prevent erroneous opening and closing of the circuit breaker
Prevent closing the circuit breaker when the earthing switch is in the closed position
Prevent access to live compartments
Prevent erroneous closing of the earthing switch when live
Each compartment has an independent pressure relief channel. In the event of an internal fault arc, they promptly release pressure and vent gases to ensure safety.
All normal operations can be performed with the cabinet door closed.
3.Flexibility and Expandability
Movable Truck Design: Depending on the application, it can be a circuit breaker truck, voltage transformer truck, metering truck, or isolation truck. Trucks of the same specification are fully interchangeable.
Busbar System: The main busbar can adopt a "triangular" layout and vertical installation, using composite insulation or air insulation, reducing the impact of short-circuit electrodynamic force.
The cable compartment is spacious, allowing for the connection of multiple cables and accommodating PTs, earthing switches, surge arresters, etc.
Supports cable connections, overhead line connections, and other functional schemes, enabling combination into various forms of power distribution assemblies.
4.Environmental Adaptability and Reliability
As key components are sealed in insulation chambers or use composite insulation, performance is less affected by environmental conditions (e.g., humidity, pollution).
All switchgear circuit breaker compartments and cable compartments can be equipped with anti-condensation heaters with automatically switched controllers.
Excellent insulation performance of the main circuit, with air clearance not less than 125mm.
Typical Applications
Power Plants: Medium and small generator power transmission, auxiliary power systems.
Substations: Receiving and feeding power in secondary substations of power systems.
Industrial and Mining Enterprises: Power distribution centers in large industrial and mining plants.
Frequently Operated Sites: Controlling frequently started high-voltage motors, etc.
Optional Configurations
Standard Type: Configured with manual operating mechanism and basic protection functions.
Intelligent Type: Configured with electric operating mechanisms, intelligent measurement and control devices (microprocessor protection), communication interfaces, supporting remote monitoring.
High-Parameter Type: Rated current up to 2500A, rated short-circuit breaking current up to 31.5kA or 40kA.
Special Environment Type: Can be designed for specific environmental requirements (e.g., high altitude, high humidity).
