Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1995-11-30
1997-03-04
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335202, 335 35, H01H 6702
Patent
active
056083670
ABSTRACT:
In a molded case circuit breaker with an interchangeable thermalmagnetic trip unit, the C-shaped heater transformer core is permanently held in place in the casing by a load bus strap with the gap in the core facing the trip unit. When the interchangeable trip unit is inserted into the molded casing, a magnetically permeable member mounted in the trip unit is aligned in the gap in the heater transformer core. The bimetal of the trip unit is fixed at one end to an electrically conductive sleeve surrounding the magnetically permeable member and forming the secondary of the heater transformer. The length of the magnetically permeable member is selected to establish the current conditions at which the bimetal trips the circuit breaker. The bus strap has an off-set section forming a first shoulder against which one wall of the housing of the interchangeable trip unit seats, and a second shoulder against which a pole piece backed by the heater transformer core seats to fix a gap between the pole piece and the armature in the interchangeable trip unit providing the instantaneous magnetic trip function.
REFERENCES:
patent: 2939929 (1960-06-01), Hobson, Jr.
patent: 4309580 (1982-01-01), Wafer et al.
patent: 4713504 (1987-12-01), Maier
patent: 5218332 (1993-06-01), Blanchard et al.
patent: 5258733 (1993-11-01), Link et al.
patent: 5321365 (1993-07-01), Kato
Hunter, Jr. David S.
Larsen Michael R.
Link Donald A.
Theisen Peter J.
Wellner Edward L.
Donovan Lincoln
Eaton Corporation
Vande Zande Larry G.
LandOfFree
Molded case circuit breaker with interchangeable trip unit havin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Molded case circuit breaker with interchangeable trip unit havin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molded case circuit breaker with interchangeable trip unit havin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2148831