发明公开
EP2403092A3 Overvoltage circuit, and motor starter, overload relay and low-power system including the same
审中-公开
过压保护电路和电动机起动器，过载继电器和包含这些低能量系统
- 专利标题： Overvoltage circuit, and motor starter, overload relay and low-power system including the same
- 专利标题（中）： 过压保护电路和电动机起动器，过载继电器和包含这些低能量系统
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申请号： EP11005355.0申请日： 2011-06-30
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公开(公告)号： EP2403092A3公开(公告)日： 2015-04-29
- 发明人: Riley, Joseph D.
- 申请人： Eaton Corporation
- 申请人地址： 1111 Superior Avenue Cleveland, OH 44114-2594 US
- 专利权人： Eaton Corporation
- 当前专利权人： Eaton Corporation
- 当前专利权人地址： 1111 Superior Avenue Cleveland, OH 44114-2594 US
- 代理机构： Klang, Alexander H.
- 优先权： US827109 20100630
- 主分类号： H02H9/04
- IPC分类号： H02H9/04 ; H02H1/06
摘要：
A motor starter (4) includes a contactor (6) and an overload relay (8). The overload relay includes a power supply (10) having a voltage (12;64), a processor (14) powered by the power supply voltage and being structured to control the contactor, and an overvoltage circuit (16;50). The overvoltage circuit includes a voltage reference (52) having a voltage (54), a comparator (56), a load (60) and a switch (58). The comparator includes a first input (62) for the power supply voltage, the first input cooperating with the voltage of the voltage reference to determine a threshold voltage, a second input (65) for voltage reference voltage, and an output (60). The switch is controlled by the comparator output and is structured to electrically connect the power supply voltage to ground (68) through the load whenever the power supply voltage exceeds the threshold voltage.
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