TRIP UNIT
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United States of America Patent
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N/A
Issued Date -
Feb 28, 2013
app pub date -
Sep 24, 2010
filing date -
Sep 25, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A trip unit includes an actuator and a cylindrical housing container the actuator. The actuator includes a cylindrical pin; a cylindrical closed chamber; a biasing member; a permanent magnet; a coil housing; and a coil supported by the coil housing. The pin is axially movably disposed in the chamber and extends out of the chamber through a sealed opening. The biasing member may comprise a spring, such as a helical spring, and may be configured to bias the pin for an axial movement in a direction out of the chamber. The permanent magnet may at least partly surround the pin during a latched condition of the trip unit. The coil housing may at least partly define the cylindrical closed chamber. In embodiments, an annular gap is provided between the pin and the permanent magnet. Methods associated with the manufacturing trip units are also disclosed.
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