![市电过电压、欠电压的负载保护电路](/CN/2017/2/149/images/201720746461.jpg)
基本信息:
- 专利标题: 市电过电压、欠电压的负载保护电路
- 专利标题(英):Loads protection circuit of commercial power overvoltage, undertension
- 申请号:CN201720746461.2 申请日:2017-06-23
- 公开(公告)号:CN206790076U 公开(公告)日:2017-12-22
- 发明人: 李淑芳 , 陈丰 , 白喜山 , 陈继民 , 郭士昌 , 董鑫 , 刘志鹏 , 刘忠海 , 王琢 , 王泓苏
- 申请人: 国网黑龙江省电力有限公司绥化供电公司 , 国家电网公司
- 申请人地址: 黑龙江省绥化市西直南路38号
- 专利权人: 国网黑龙江省电力有限公司绥化供电公司,国家电网公司
- 当前专利权人: 国网黑龙江省电力有限公司绥化供电公司,国家电网公司
- 当前专利权人地址: 黑龙江省绥化市西直南路38号
- 代理机构: 哈尔滨市松花江专利商标事务所
- 代理人: 刘士宝
- 主分类号: H02H3/20
- IPC分类号: H02H3/20 ; H02H3/24
Loads protection circuit of commercial power overvoltage, undertension, the utility model discloses a cause the problem of electrical equipment damage when solving commercial power overvoltage, undertension. The utility model discloses a circuit breaker QS, start button SB1, stop button SB2, electrothermal relay FR, ac contactor KM, auxiliary relay K1~K2, transformer T, rectifier bridge UR, comparator A1~A2, resistance R1~R4, slide rheostat RP1~RP2, triode VT1~VT2, during the undertension, the A1 output high level, the K1 coil gets electricly, K1 normally open contact disconnection, KM coil power -lossing, the disconnection of KM main contacts, the mains power supply return circuit that cuts off the load, during the overvoltage, the A2 output high level, the K2 coil gets electricly, K2 normally open contact disconnection, KM coil power -lossing, the disconnection of KM main contacts, the mains power supply return circuit that cuts off the load.