【摘要】 为降低发电厂真空开关投切大型电动机产生的过电压 ,采用三叉戟式避雷器及阻容吸收器 2种保护方式在蒲山电厂进行了真空开关投切碎煤机和给水泵的试验 ,试验结果表明 :阻容吸收器及三叉戟式避雷器均能有效限制操作过电压 ,阻容吸收法略优于三叉戟避雷器法 ;在采用了上述过电压保护后 ,其过电压最高可达 3.2倍相电压幅值 ,最大过电压出现在操作开关侧更多还原

【Abstract】 In order to reduce the overvoltage produced by switching the induction machine the test is made with vacuum circuit breaker to switch the induction machine using the surge arrester and RC absorber. The test results show the surge arrester and RC absorber is effective. The RC absorber is better than the arrester. The overvoltage is up to 3.07 p.u.更多还原