KYN28 cabinet is a high-voltage switchgear, with specific information as follows: Application scope: KYN28 cabinet is suitable for indoor complete distribution equipment of three-phase AC 50Hz single bus and double bus segmented systems. It is suitable for power plants, substations, and industrial and mining enterprises with rated voltage of 3-12kV power grids. It is used for receiving and distributing electrical energy, and for controlling, protecting, and monitoring circuits. Structural features: The KYN28 cabinet consists of a fixed cabinet body and a movable vacuum circuit breaker handcart. The cabinet body is divided into four small chambers: busbar chamber, circuit breaker chamber, cable chamber, and low-voltage chamber. The cabinet structure is made of aluminum zinc coated plate processed by CNC machine using multiple bending processes and bolted together; All operations are carried out with the cabinet door closed; High protection level, which can prevent the invasion of debris and pests; Simple and effective "five prevention" locking to prevent misoperation. Can be equipped with VS1 and VD4 vacuum circuit breakers; Replacing the circuit breaker is simple, and the handcart has good interchangeability performance; Reliable wall installation and front maintenance of cabinets to reduce floor space; The cable room has ample space and can connect multiple cables; Heaters can be installed separately in the circuit breaker room and cable room to prevent condensation and corrosion. Technical parameters: Rated voltage: 3.6kV~12kV. Rated frequency: 50Hz. Rated current of circuit breaker: 630A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A. Rated short-time withstand current (4s): 25kA, 31.5kA, 40kA. Rated peak withstand current (peak): 63kA, 80kA, 100kA. Rated short-circuit breaking current: 25kA, 31.5kA, 40kA. Rated short-circuit closing current (peak): 63kA, 80kA, 100kA. Environmental conditions for use: The altitude shall not exceed 2000m. The highest temperature is+40 ℃, and the lowest temperature is -5 ℃ (outdoors). Relative humidity of the environment: daily average not exceeding 95%, monthly average not exceeding 90%. The seismic intensity shall not exceed 8 degrees. Vibration, impact, and highly corrosive environments should be avoided. Compliance with standards: KYN28 cabinet meets technical standards such as IEC298 and GB3906.