Electromagnetic actuator of the type of a relay
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United States of America Patent
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Jul 5, 1994
Grant Date -
N/A
app pub date -
Mar 4, 1991
filing date -
Jul 8, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electromagnetic actuator (1) of the type of a relay, having an armature (2) polarized by a permanent magnet (5) and a movable drive element (6) attracted by the armature (2) against a spring means (8), incorporates an electric current sensor consisting of a toroidal transformer (16) penetrated by at least one conductor (17) from an electric power supply line. The actuator (1) of this invention has a major advantage in that it can combine in a single device the functions of sensing differential currents on the line and of tripping off the break mechanism of a protection breaker, within a highly compact volume.
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