Product description
KYN28A-12 type armored removable AC metal-enclosed switchgear is referred to as a center cabinet because the vacuum circuit breaker switch is often placed in the middle. It is suitable for three-phase AC 50Hz power systems and plays the role of switching, control or protection in power generation, transmission, distribution, power conversion and consumption of power systems. The rated voltage is 3.6KV~12KV. Its characteristic is that the equipped vacuum circuit breaker is of the central type, that is, the circuit breaker is located in the middle of the front cabinet of the switch cabinet. Therefore, the lower space is saved and can be used for the expansion of other solutions or as a cable room. The main application areas are: urban residents, large secondary substations, switch offices, industrial and mining enterprises, shopping malls, airports, subways, wind power generation, hospitals, stadiums, railways, tunnels, etc.
Model and its meaning
main feature
1. The high-voltage switch cabinet structure is made of aluminum-zinc-coated plates, processed by CNC machine tools using multiple bending processes, and then bolted.
2. All operations are performed with the cabinet door closed.
3. High protection level, which can prevent the intrusion of debris and pests.
4. Simple and effective "five prevention" locking to prevent misoperation.
5. Can be equipped with VS1 and VD4 vacuum circuit breakers.
6. It is easy to replace the circuit breaker and the handcart has good interchangeability.
7. The cabinet can be installed on the wall and maintained in front of the cabinet to reduce the floor space.
8. The cable room has ample space and can connect multiple cables.
9. Heaters can be installed in the circuit breaker room and cable room respectively to prevent condensation and corrosion.
Introduction to the structure of the central cabinet
It is divided into three floors: upper, middle and lower. The upper floor is the busbar room and instrument room. The instrument room is in the front and the busbar room is in the back. There is a partition between the two small rooms. The middle layer is the switch room, which is the compartment where the vacuum circuit breaker is placed. The circuit breaker adopts a handcart-type vacuum circuit breaker, which is easy to install. During maintenance and replacement, you only need to push out the circuit breaker trolley without cutting off the power. The lower level is a cable room with enough space to connect multiple cables.
Five-proof interlocking function
1. Prevent closing with load: After the vacuum circuit breaker trolley is closed in the test position, the trolley circuit breaker cannot enter the working position.
2. Prevent closing with grounding wire: When the grounding knife is closed, the trolley circuit breaker cannot be closed.
3. Prevent accidental entry into the live compartment: When the vacuum circuit breaker is closing, the back door of the cabinet is locked with the machine on the grounding knife.
4. Prevent the live grounding wire from being hung up: When the vacuum circuit breaker is closed during operation, the closed grounding knife cannot be put in.
5. Prevent the under-loaded broach switch: When the vacuum circuit breaker is closed and running, it cannot exit the working position of the trolley circuit breaker.