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Address: 4-2, Building E, Huazhong Enterprise City, 16 North Avenue, Hankou, Wuhan City
KYN28A-12(Z) Mid-mounted armored removable metal-enclosed switchgear
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Overview KYN28A-12(Z) mid-mounted armored removable metal enclosed switchgear (hereinafter referred to as switchgear) is a new type of indoor switchgear developed with reference to the technology of ABB Company in Switzerland and on the basis of widely absorbing the advantages of similar products at home and abroad. The switchgear adopts a mid-mounted structure with high technical performance index. It is suitable for 3.6-12kV three-phase AC 50Hz indoor single bus or single bus sectional power distribution system. It is used for power plants, industrial and mining enterprises, buildings, hotels, municipal construction and other departments to receive and distribute electric energy, and to control, protect and monitor the circuits. The switchgear is fully compliant with GB3906, ICE-298 and other standards. Features The switch cabinet adopts ABB VD4 type or domestic advanced VSI type vacuum circuit breaker. The mid-mounted structure saves about 50% of the space in the circuit breaker handcart room, which is more conducive to cable installation. Enclosure protection IP4X. Small size, reduced footprint. Light weight, high mechanical strength and assembly accuracy, beautiful appearance. The cabinet shell has strong corrosion resistance and oxidation resistance. The electrical clearance in the cabinet is greater than 125mm, and the air clearance in the composite insulation is greater than 60mim. It has the ability to resist internal arc accidents and ensure the safety of operators in case of accidents. The product has a perfect mechanical interlock device to prevent misoperation, which can effectively prevent electrical misoperation. Normal use of environmental conditions ● altitude does not exceed 1000 meters. ● Upper limit of ambient temperature is 40 ℃, lower limit is 15 ℃ ● Relative humidity: daily average value is not more than 95%, and monthly average value is not more than 90%. ● The surrounding air is not obviously polluted by corrosive or combustible gas, water vapor, etc. ● No frequent violent vibration. Beyond the above conditions of use, the user has special requirements, can negotiate with the manufacturer special.
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Product Details
The switch cabinet has the functions of overhead incoming and outgoing lines, cable incoming and outgoing lines, bus connection, etc. Mainly suitable for power plants, substations, petrochemical, metallurgical steel rolling, light industry and textile, factories and mining enterprises and residential areas, high-rise buildings and other different places. It mainly includes high-voltage isolating switch and grounding switch, high-voltage load switch, high-voltage automatic coincidence and segmenter, high-voltage operating mechanism, high-voltage explosion-proof distribution device and high-voltage switch cabinet.
Correct Selection of Breaker Breaking Capacity
On the primary system diagram, the selected circuit breaker, indicating the circuit breaker model, rated working voltage and rated working current, must also be selected for the breaking capacity of the circuit breaker. With user drawings, the breaking capacity of the circuit breaker is not selected, which makes it difficult for the manufacturer to carry out engineering design. The breaking capacity selection should be based on the system short-circuit parameters. If the manufacturer does not understand the system short-circuit parameters, it is difficult to make the correct choice. There are also some user drawings, regardless of the system short-circuit parameters, blindly select high-break parameters, resulting in unnecessary waste of funds. The correct choice of breaking capacity is very important, not only to ensure safe operation, but also to consider reducing product costs.
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