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KYN61-40.5 Armored Removable AC Metal-Enclosed Switchgear
Mainly used in power plants, substations, industrial and mining enterprises, and high-rise buildings
Category:
High Voltage Switchgear
Service Phone:
Product Description
1. Product Overview
The KYN61 type high-voltage cabinet generally refers to the KYN61-40.5 type armored removable AC metal-enclosed switchgear, suitable for three-phase AC 50Hz power systems with a rated voltage of 40.5kV. It is mainly used in power plants, substations, industrial and mining enterprises, and high-rise buildings for receiving and distributing electrical energy and starting large high-voltage motors. It provides functions such as control, protection, and detection of circuits, and can also be used in places requiring frequent operation control. This high-voltage cabinet complies with GB 3906 "3.6kV-40.5kV AC Metal-Enclosed Switchgear and Control Equipment", IEC 60694 "Common Technical Requirements for High-Voltage Switchgear and Controlgear Standards", DL404 "Technical Conditions for Indoor AC Switchgear Ordering", and other related standards. It features comprehensive "five-prevention" functions to effectively prevent misoperation and ensure the safe and stable operation of the power system.
2. Operating Environment Conditions
1. Altitude: Not exceeding 2000 meters. If the actual operating environment altitude is higher than this value, it may affect the insulation performance and heat dissipation of the equipment. Special design or measures should be discussed with the manufacturer.
2. Ambient temperature: The upper limit of the operating ambient temperature is +40°C, with a 24-hour average not exceeding 35°C; the lower limit is -10°C. Exceeding this temperature range may cause degradation of insulation materials, electronic components, and other performance inside the equipment, affecting normal operation and service life.
3. Relative humidity: Daily average not exceeding 95%, monthly average not exceeding 90%. High humidity environments may cause internal condensation, leading to reduced insulation performance and corrosion of metal parts.
4. Seismic intensity: Not exceeding level 8. Earthquakes may damage the installation foundation and cabinet structure, affecting equipment stability and electrical connection reliability.
5. Surrounding environment: Must be installed in places free from fire, explosion hazards, severe dirt, chemical corrosion, and intense vibration. The presence of these adverse factors may cause equipment failure or even safety accidents.
3. Main Technical Parameters
1. Rated voltage: 40.5kV, indicating the nominal voltage of the power system suitable for this high-voltage cabinet.
2. Rated insulation level:
● 1-minute power frequency withstand voltage: 95kV phase-to-phase and phase-to-ground, 118kV at isolation gap. This parameter measures the equipment's insulation withstand capability under power frequency voltage.
● Lightning impulse withstand voltage: 185kV phase-to-phase and phase-to-ground, 215kV at isolation gap. This reflects the equipment's insulation ability to withstand lightning impulse overvoltage.
3. Rated frequency: 50Hz, consistent with the standard frequency of China's power system.
4. Rated current: Common specifications include 1250A, 1600A, 2000A, 2500A, etc. The appropriate rated current high-voltage cabinet should be selected according to the actual electrical load.
5. Rated short-time withstand current (4s): Generally 20kA, 25kA, 31.5kA, etc., reflecting the equipment's ability to withstand the thermal effect of short-circuit current within the specified time.
6. Rated short-circuit breaking current: Corresponding to 20kA, 25kA, 31.5kA, etc., indicating the maximum short-circuit current value that the high-voltage cabinet can reliably break.
7. Rated peak withstand current: 50kA, 63kA, 80kA, etc., representing the equipment's ability to withstand the electrodynamic effect of short-circuit current.
8. Rated short-circuit making current: Close to the rated peak withstand current value, measuring the high-voltage cabinet's ability to reliably close short-circuit current under short-circuit conditions.
9. Protection level: The enclosure protection level is IP3X, preventing solid foreign objects larger than 2.5mm from entering; when the truck compartment door is open, the protection level is IP2X, preventing solid foreign objects larger than 12mm and fingers from touching dangerous parts.
4. Structural Features
1. Cabinet structure: The cabinet adopts an assembled structure. The main frame is formed by high-quality cold-rolled steel plates processed by CNC sheet metal and connected by high-strength bolts, nuts, and rivet nuts. This structure has high strength and stability, facilitating transportation and on-site assembly. The enclosure protection level is generally IP3X or IP4X, effectively dustproof and preventing foreign object intrusion. Functional compartments such as circuit breaker compartment, busbar compartment, cable compartment, and low-voltage compartment are separated by metal partitions, forming independent spaces. This not only improves equipment safety but also facilitates maintenance and inspection. Additionally, the cabinet is equipped with an independent pressure relief channel that safely releases high-pressure gas and flames in case of internal arc faults, preventing harm to surrounding equipment and personnel, meeting IAC-A level internal arc fault design requirements.
2. Truck structure: The circuit breaker uses a truck floor-mounted structure. The truck has clear test and working positions inside the cabinet, each equipped with reliable locking devices to ensure stable and reliable positioning, preventing misoperation. The truck frame is equipped with a screw-nut advancing mechanism, allowing operators to easily move the truck between positions. Moreover, trucks of the same specification have good interchangeability, such as vacuum circuit breaker trucks, voltage transformer trucks, and metering trucks, facilitating truck replacement during maintenance, inspection, or functional adjustment.
3. Compartment design:
● Circuit breaker compartment: Used for installing and operating the circuit breaker truck. When the circuit breaker truck is in the test position, operations such as circuit breaker opening and closing tests can be performed without affecting the main circuit operation; in the working position, the circuit breaker is reliably connected to the main circuit, achieving control and protection functions. This compartment is equipped with comprehensive interlocking devices to ensure that the truck can only be moved when the circuit breaker is in the open state and other safety conditions are met, preventing truck operation under load and ensuring the safety of operators and equipment.
● Busbar compartment: Used for installing the main busbar, which is generally made of high-conductivity copper or aluminum with good electrical conductivity and mechanical strength. The busbar compartment is isolated from other compartments by metal partitions, effectively preventing busbar faults from affecting other parts. The busbar connection method usually uses bolt connections or welding to ensure reliable connection and low contact resistance.
● Cable Room: Spacious, facilitating cable entry, exit, and connection. Can connect multiple cables to meet different power transmission needs. The bottom of the cable room is equipped with cable fixing brackets to secure cables and prevent damage caused by external pulling forces. The room is also equipped with lighting to help operators observe cable connections during maintenance. The rear door is generally equipped with a high-voltage live display to visually indicate whether the cable is live, ensuring operator safety. Additionally, the rear door features mechanical and electrical interlocks, allowing it to open only when the grounding switch is closed and other safety conditions are met, preventing accidental entry into live compartments.
● Low Voltage Room: Mainly used for installing secondary control components, relays, terminal blocks, and other low-voltage equipment. These devices are used to control, protect, monitor, and transmit signals for the high-voltage cabinet. The low voltage room uses a built-in live door mechanism, allowing secondary components and terminals to be installed on the live door and optionally integrated externally for easy maintenance and replacement, improving equipment maintenance convenience.
5. Overall Dimensions
● Length*Depth*Height (unit: mm): 1400 (1200) × 2800 (3000) × 2800
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Address: No. 10, Keji Avenue, Jixian Industrial Park, Zhouzhi County, Xi'an City, Shaanxi Province
Phone: 86029-61826234
Postal Code: 710400