Rating plug for circuit breakers

Details Rating plug for circuit breakers Rating plug for circuit breakers

1999-12-28

2002-02-12

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With housing or support means

C335S176000, C335S132000

Reexamination Certificate

active

06346869

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to the field of circuit breakers. More particularly, this invention relates to the field of rating plugs for circuit breakers having electronic sensors or trip units.
Rating plugs for circuit breakers with electronic trip units are known in the art. The rating plug changes the operating curve for actuation of a breaker having an electronic circuit interrupter (trip unit), thus changing the ampere rating of the breaker. Not all rating plugs are compatible with all electronic trip units. Therefore, a known problem is to ensure that a rating plug is compatible with the electronic trip unit into which it is to be inserted.
For safety's sake, all electronic trip units with interchangeable rating plugs are required to reject incorrect combinations of rating plugs and trip units. This rejection is typically accomplished by the insertion of pins into the receptacle in the trip unit into which the rating plug is to be inserted. The pins, which are inserted into the side of the trip unit housing, interfere with protrusions on the side of the rating plug housing.
While workable, this prior art system has several drawbacks or disadvantages. One of these is that the interference between pins and protrusions does not occur until the rating plug is almost fully inserted into the trip unit. This can result in the user mistakenly thinking that insertion of the rating plug has been properly completed. Another problem is that the pins are independent elements, i.e., they are not part of the rating plug housing or the trip unit housing. As a result, a pin can be removed by someone tampering with the unit, and the user will not know whether a pin should be present or not.
BRIEF SUMMARY OF THE INVENTION
In an exemplary embodiment of the invention, an improved rating plug housing for a circuit breaker includes a recess formed in a portion of the circuit breaker housing. The recess has a projection formed on a bottom surface thereof. A rating plug, having an electronic portion arranged within a rating plug housing, is sized and shaped to fit into said recess. A tab extends from a bottom surface of said rating plug housing, said tab being arranged to contact said projection when said electronic portion is incompatible with a trip unit within said circuit breaker housing. If an attempt is made to insert an inappropriate rating plug into the circuit breaker housing, the tab on the rating plug unit will come into contact and interfere with the projection in the recess of the circuit breaker housing, and installation of the inappropriate rating plug will be prevented.


REFERENCES:
patent: 2340682 (1944-02-01), Powell
patent: 2719203 (1955-09-01), Gelzheiser et al.
patent: 2937254 (1960-05-01), Ericson
patent: 3158717 (1964-11-01), Jencks et al.
patent: 3162739 (1964-12-01), Klein et al.
patent: 3197582 (1965-07-01), Norden
patent: 3307002 (1967-02-01), Cooper
patent: 3517356 (1970-06-01), Hanafusa
patent: 3631369 (1971-12-01), Menocal
patent: 3803455 (1974-04-01), Willard
patent: 3883781 (1975-05-01), Cotton
patent: 4129762 (1978-12-01), Bruchet
patent: 4144513 (1979-03-01), Shafer et al.
patent: 4158119 (1979-06-01), Krakik
patent: 4165453 (1979-08-01), Hennemann
patent: 4166988 (1979-09-01), Ciarcia et al.
patent: 4220934 (1980-09-01), Wafer et al.
patent: 4255732 (1981-03-01), Wafer et al.
patent: 4259651 (1981-03-01), Yamat
patent: 4263492 (1981-04-01), Maier et al.
patent: 4276527 (1981-06-01), Gerbert-Gaillard et al.
patent: 4297663 (1981-10-01), Seymour et al.
patent: 4301342 (1981-11-01), Castonguay et al.
patent: 4360852 (1982-11-01), Gilmore
patent: 4368444 (1983-01-01), Preuss et al.
patent: 4375021 (1983-02-01), Pardini et al.
patent: 4375022 (1983-02-01), Daussin et al.
patent: 4376270 (1983-03-01), Staffen
patent: 4383146 (1983-05-01), Bur
patent: 4392036 (1983-07-01), Troebel et al.
patent: 4393283 (1983-07-01), Masuda
patent: 4401872 (1983-08-01), Boichot-Castagne et al.
patent: 4409573 (1983-10-01), DiMarco et al.
patent: 4435690 (1984-03-01), Link et al.
patent: 4467297 (1984-08-01), Boichot-Castagne et al.
patent: 4468645 (1984-08-01), Gerbert-Gaillard et al.
patent: 4470027 (1984-09-01), Link et al.
patent: 4479143 (1984-10-01), Watanabe et al.
patent: 4488133 (1984-12-01), McClellan et al.
patent: 4492941 (1985-01-01), Nagel
patent: 4541032 (1985-09-01), Schwab
patent: 4546224 (1985-10-01), Mostosi
patent: 4550360 (1985-10-01), Dougherty
patent: 4562419 (1985-12-01), Preuss et al.
patent: 4589052 (1986-05-01), Dougherty
patent: 4595812 (1986-06-01), Tamaru et al.
patent: 4611187 (1986-09-01), Banfi
patent: 4612430 (1986-09-01), Sloan et al.
patent: 4616198 (1986-10-01), Pardini
patent: 4622444 (1986-11-01), Kandatsu et al.
patent: 4631625 (1986-12-01), Alexander et al.
patent: 4642431 (1987-02-01), Tedesco et al.
patent: 4644438 (1987-02-01), Puccinelli et al.
patent: 4649247 (1987-03-01), Preuss et al.
patent: 4658322 (1987-04-01), Rivera
patent: 4672501 (1987-06-01), Bilac et al.
patent: 4675481 (1987-06-01), Markowski et al.
patent: 4682264 (1987-07-01), Demeyer
patent: 4689712 (1987-08-01), Demeyer
patent: 4694373 (1987-09-01), Demeyer
patent: 4710845 (1987-12-01), Demeyer
patent: 4717985 (1988-01-01), Demeyer
patent: 4728914 (1988-03-01), Morris et al.
patent: 4733211 (1988-03-01), Castonguay et al.
patent: 4733321 (1988-03-01), Lindeperg
patent: 4764650 (1988-08-01), Bur et al.
patent: 4768007 (1988-08-01), Mertz et al.
patent: 4780786 (1988-10-01), Weynachter et al.
patent: 4831221 (1989-05-01), Yu et al.
patent: 4870531 (1989-09-01), Danek
patent: 4883931 (1989-11-01), Batteux et al.
patent: 4884047 (1989-11-01), Baginski et al.
patent: 4884164 (1989-11-01), Dziura et al.
patent: 4900882 (1990-02-01), Bernard et al.
patent: 4910485 (1990-03-01), Bolongeat-Mobleu et al.
patent: 4914541 (1990-04-01), Tripodi et al.
patent: 4916420 (1990-04-01), Bartolo et al.
patent: 4916421 (1990-04-01), Pardini et al.
patent: 4926282 (1990-05-01), McGhie
patent: 4935590 (1990-06-01), Malkin et al.
patent: 4937706 (1990-06-01), Schueller et al.
patent: 4939492 (1990-07-01), Raso et al.
patent: 4943691 (1990-07-01), Mertz et al.
patent: 4943888 (1990-07-01), Jacob et al.
patent: 4950855 (1990-08-01), Bolongeat-Mobleu et al.
patent: 4951019 (1990-08-01), Gula
patent: 4952897 (1990-08-01), Barnel et al.
patent: 4958135 (1990-09-01), Baginski et al.
patent: 4965543 (1990-10-01), Batteux
patent: 4983788 (1991-01-01), Pardini
patent: 5001313 (1991-03-01), Leclerq et al.
patent: 5004878 (1991-04-01), Seymour et al.
patent: 5027091 (1991-06-01), Lesslie et al.
patent: 5029301 (1991-07-01), Nebon et al.
patent: 5030804 (1991-07-01), Abri
patent: 5057655 (1991-10-01), Kersusan et al.
patent: 5077627 (1991-12-01), Fraisse
patent: 5083081 (1992-01-01), Barrault et al.
patent: 5095183 (1992-03-01), Raphard et al.
patent: 5103198 (1992-04-01), Morel et al.
patent: 5115371 (1992-05-01), Tripodi
patent: 5120921 (1992-06-01), DiMarco et al.
patent: 5132865 (1992-07-01), Mertz et al.
patent: 5138121 (1992-08-01), Streich et al.
patent: 5140115 (1992-08-01), Morris
patent: 5153802 (1992-10-01), Mertz et al.
patent: 5155315 (1992-10-01), Malkin et al.
patent: 5166483 (1992-11-01), Kersusan et al.
patent: 5172087 (1992-12-01), Castonguay et al.
patent: 5178504 (1993-01-01), Falchi
patent: 5184717 (1993-02-01), Chou et al.
patent: 5187339 (1993-02-01), Lissandrin
patent: 5198956 (1993-03-01), Dvorak
patent: 5200724 (1993-04-01), Gula et al.
patent: 5210385 (1993-05-01), Morel et al.
patent: 5239150 (1993-08-01), Bolongeat-Mobleu et al.
patent: 5260533 (1993-11-01), Livesey et al.
patent: 5262744 (1993-11-01), Arnold et al.
patent: 5280144 (1994-01-01), Bolongeat-Mobleu et al.
patent: 5281776 (1994-01-01), Morel et al.
patent: 5296660 (1994-03-01), Morel et al.
patent: 5296664 (1994-03-01), Crookston et al.
patent: 5298874 (1994-03-01), Morel et al.
patent: 5300907 (1994-04-01), Nereau et al.
patent: 5310971 (1994-05-01), Vial et al.
patent: 5313180 (1994-05-01), Vial et al.
patent: 5317471 (1994-05-01), Izoard et al.
patent: 5331500 (1994-07-01), Corcoles et

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