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Electrical Vacuum Load Break Disconnect Switch 12kV High Voltage FZN25-12D
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|Rate Voltage||12kV||Frequency Voltage||42kV|
hv disconnect switch,
load break disconnect switch
FZN25-12D High Voltage Indoor Vacuum Load switch with Switcgear
The type FZN 25 high voltage indoor vacuum load switch and electrical comination is use for Three phase alternating current Concurrent 50HZ industrial power euipments , its can laod control and protect short current . Load switch is open-close load , closed current , and charging cables current . Electrical comination can close any current . There can be use by hand and power . FZN25 is designed by drive type , light weight .
A load switch is an electrical switch between an isolation switch and a circuit breaker. It has a simple arc extinguishing device that can cut the rated load current and a certain overload current, but can not cut the short circuit current.
Under the action of the separation spring, the spindle rotates clockwise, on the one hand, the piston moves upwards through the crank slide mechanism, compressing the gas. On the other hand, two sets of four-rod drive system make the main gate knife open first, then push the arc cutter to open the arc contact, the compressed air in the cylinder through the vent to extinguish the arc.
The load switch can be broken with load and has self-extinguishing arc function. The isolation switch is generally can not take the load break, the structure has no arc cover, there is also the separation switch can break the load, but the structure and the load switch is different, relatively simple. Load switch and isolation switch, can form the obvious break point, most circuit breaker does not have the isolation function, but also has the few break-through device isolation function. The isolation switch does not have protection function, the load switch has overload protection function. The combination of load switch and fuse can trip automatically and have part function of circuit breaker. The circuit breaker can have short circuit protection, overload protection, leakage protection and other functions. The essential difference between a load switch and a circuit breaker is that their switching capacity is different. The switching capacity of a circuit breaker can be high in manufacturing but the switching capacity of a load switch is limited.
|Rated voltage (KV)||12|
|Insulator(capacity)||insulating||Frequency withstand voltage 5 min (KV)||42|
|Frequency withstand voltage 1 min (V)||2000|
|Lighting impulse withstand voltage (KV)||75|
|Local discharge (pc)||≤10|