What are the advantages of vacuum contactors?
Answer: The vacuum contactor has strong extinction ability, good pressure resistance performance, high operating frequency, long service life, no arc external spraying, small volume, light weight and long maintenance period. The vacuum interrupter of the vacuum contactor has a high process requirement, and if the process is poor, the vacuum of the arc extinguishing chamber is liable to decrease. The material of the contact material is not good. When the current is interrupted, the phenomenon of "cut-off over-voltage" will occur. That is, when the current is interrupted, the arc-extinguishing capacity of the vacuum interrupter is very strong, and the arc current is not cut off at the natural zero-crossing, but from A certain value of the current suddenly drops to zero, whereby a high overvoltage occurs. The cut-off voltage can jeopardize the safe operation of electrical equipment.
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