发明名称 |
Time delay undervoltage release |
摘要 |
A time delay undervoltage release for an electric circuit breaker causes the circuit breaker to trip when the control voltage drops below an acceptable level and prevents the breaker from being closed until the control voltage rises to a predetermined level. When the control voltage drops below an acceptable level, the undervoltage release energizes a trip solenoid to trip the breaker. A variable delay is interposed between the control voltage dropping below the acceptable level and the trip solenoid being energized. At the same time the trip solenoid is energized, an inhibit solenoid is deenergized to block the operation of the push-to-close button. When the control voltage increases to a predetermined level, the inhibit solenoid is energized, allowing the push-to-close button to be manually operated and the breaker returned to service.
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申请公布号 |
US4631624(A) |
申请公布日期 |
1986.12.23 |
申请号 |
US19840667928 |
申请日期 |
1984.11.02 |
申请人 |
SQUARE D COMPANY |
发明人 |
DVORAK, ROBERT F.;JANSEN, HARLEY W.;ZYLSTRA, HENRY J. |
分类号 |
H02H3/247;H02H11/00;(IPC1-7):H02H3/247 |
主分类号 |
H02H3/247 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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