Electronic type protective relay
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United States of America Patent
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-
Feb 12, 2008
Grant Date -
Jul 20, 2006
app pub date -
Dec 22, 2005
filing date -
Jan 14, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An electronic type protective relay integrates the mechanical structure into a single operation rod to protect electric machinery. The electronic type protective relay includes an insulating shell, a tripping rod, a magnetic-force device and an operation device. The tripping rod is pivoted in the inner part of the insulating shell and conducts two pairs of connection pins. The tripping rod includes a control magnetic core. The magnetic-force device includes a tripping electromagnet, a reset electromagnet, and a permanent magnet installed between the tripping electromagnet and the reset electromagnet. The operation device includes an auxiliary rod located on one side of the tripping rod, an operation rod installed between the tripping rod and the auxiliary rod and protruding beyond the insulating shell. The operation rod can be located at four locations and in cooperation with the auxiliary rod to stop or reset.
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