Protective switch
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United States of America Patent
Stats
-
Nov 4, 2003
Grant Date -
Feb 6, 2003
app pub date -
Aug 1, 2002
filing date -
Aug 6, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A protective switch includes a switch housing, a switching mechanism for closing and opening a movable contact, a tripping mechanism instantaneously pulling a plunger upon detection of an instant current, a tripping control device, an alarm switch, and a trip member. The trip member is divided into an upper trip member away from a bottom of the housing, and a lower trip member close to the bottom of the housing urged by a back spring. The upper trip member includes a plunger operating section opposed to an operating member of the plunger and a switch operating section opposed to an actuator of the alarm switch. The lower trip member includes a locking member operating section opposed to a locking member of a switching mechanism and a tripping section opposed to an operating member of a tripping control device.
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