Medium Voltage distribution panel
The KYN28A-12 is a 12kV rated indoor metal-clad withdrawable switchgear, designed for three-phase AC 50Hz indoor complete power distribution equipment. It features an armored withdrawable construction and is primarily used in power plants, substations, industrial and mining enterprises, and high-rise buildings for receiving and distributing electrical energy, as well as controlling, protecting, and monitoring circuits. Compliant with GB, DL, and IEC standards, it incorporates a comprehensive "Five Prevention" interlocking function, making it a high-performance, safe, and reliable power distribution device.
Detailed Technical Specifications
Parameter Category | Technical Specifications |
Rated Characteristics | Rated Voltage: 12kV |
Insulation Level | 1min Power Frequency Withstand Voltage: Phase-to-Phase & Phase-to-Ground 42kV, Isolating Distance 48kV |
Short-circuit Characteristics | Rated Short-circuit Breaking Current: 20kA, 25kA, 31.5kA, 40kA |
Mechanical Characteristics | Protection Degree: Enclosure IP4X, Between compartments/Circuit Breaker Compartment door open IP2X |
Auxiliary Circuit | Rated Voltage: AC or DC 110V/220V |
Key Product Features
1.Excellent Structure and Materials
The enclosure is made of high-quality aluzinc steel plates, processed by CNC machines and using multiple bending processes, offering high precision, corrosion resistance, oxidation resistance, and high mechanical strength.
The armored 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.
The withdrawable design facilitates easy inspection and maintenance of the movable truck.
2.Outstanding Electrical Performance and Safety
Can be equipped with high-performance vacuum circuit breakers such as VS1 (ZN63) or VD4 series, featuring strong breaking capacity and long service life.
Comprehensive "Five Prevention" 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
Pressure relief devices are installed above the circuit breaker compartment, busbar compartment, and cable compartment. In the event of an internal fault arc, they promptly release pressure and vent gases to ensure safety.
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 interchangeable.
Busbar System: A single busbar system can be used, and derivatives like single busbar with bypass or double busbar structures are available to meet different main wiring requirements.
The cable compartment is spacious, allowing for the connection of multiple cables.
Supports overhead line connections, cable connections, and other functional schemes, enabling combination into various forms of power distribution assemblies.
4.Intelligent Monitoring and Control (Optional)
Can be equipped with microprocessor protection devices and intelligent measurement and control devices.
Can be fitted with electric operating mechanisms (e.g., electric truck chassis, electric earthing switch), supporting programmed operation and remote control.
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.
Large Buildings: Power distribution systems in high-rise buildings and commercial complexes.
Others: Starting and control of large high-voltage motors.
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, communication interfaces, supporting remote monitoring and programmed operation.
High-Parameter Type: Rated current up to 4000A, rated short-circuit breaking current up to 40kA.
Special Environment Type: Can be designed for specific environmental requirements (must be specified when ordering).
