Overcurrent trip device
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United States of America Patent
Stats
-
Oct 20, 1998
Grant Date -
N/A
app pub date -
Mar 25, 1997
filing date -
Mar 26, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An overcurrent trip device includes a capacitor 13 that stores power for driving a trip electromagnet 7, and a charging current generating means 18 that starts charging the capacitor 13 upon detection of an overcurrent and that completes the charging of the capacitor 13 until a trip control circuit 5 outputs a trip signal. The operation of the trip electromagnet 7, which is driven with the charges of the capacitor 13 by causing a thyristor 12 to be turned on by the trip signal, is continued until the charges of the capacitor 13 are lost, and even after the power supply from a rectifying circuit 4 is stopped due to the opening of a circuit breaker 8, it is made impossible to reset and re-close the circuit breaker 8 for a predetermined time.
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