Ambient temperature responsive trip device for static trip circu

Details Ambient temperature responsive trip device for static trip circu Ambient temperature responsive trip device for static trip circu

1979-11-28

1981-09-08

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

335146, 337140, H01H 900

Patent

active

042887690

ABSTRACT:
A flux shifting circuit breaker trip device includes a permanent magnet for developing a holding flux to create a magnetic force on a plunger sufficient to hold it in its retracted position in opposition to a spring. An electromagnet energized under the control of a static trip unit develops flux in opposition to this holding flux, whereupon the spring becomes overpowering and propels the plunger to its extended position effecting a circuit protective trip function. Temperature responsive means are also included to increase the reluctance in a region of the holding flux path in response to an excessive ambient temperature condition within the breaker enclosure, whereupon the spring becomes empowered to motivate a thermal override trip function.

REFERENCES:
patent: 2255638 (1941-09-01), Armstrong
patent: 2926227 (1960-03-01), Sundt
patent: 3130354 (1964-04-01), Burling
patent: 3206573 (1965-09-01), Anderson et al.
patent: 3792390 (1974-02-01), Boyd
patent: 3810059 (1974-05-01), Jost

Affiliated with

Also associated with

Rating

Ambient temperature responsive trip device for static trip circu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ambient temperature responsive trip device for static trip circu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ambient temperature responsive trip device for static trip circu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1194945