真空断路器操作过电压分析及限制措施

真空断路器在断开感性负荷时，会产生操作过电压。过电压可能损坏电气设备的绝缘，为了限制操作过电压，本文分析了过电压保护应满足的条件以及常规氧化锌避雷器在保护高压电动机相间绝缘时存在的局限性，并介绍了一种新型的过电压保护器，可有效地抑制操作过电压。

Analysis And Limiting Measures of Operating Over-Voltage Due to Vacuum Breaker

When the vacuum breaker is being cut off the induction load,operating over voltage will be produced,and the over voltage may damage the insulation of electric equipment.In order to limit operating over voltage,this paper has analyzed the conditions that the over voltage protection should satisfy and the limitation of the general zinc oxide lightning arrester during protection of phase phase insulation of high voltage motor is present. A new type over voltage protector is introduced. The protector can limit the operating over voltage effectively.