Electrical switching apparatus and trip assembly therefor

Patent metadata

Field	Value
Publication number	US-9715972-B2
Application number	US-201615364854-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	May 7, 2015
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

A trip assembly is for an electrical switching apparatus. The electrical switching apparatus includes a housing, an electrical communication assembly coupled to the housing, separable contacts enclosed by the housing, and an operating mechanism for opening and closing the separable contacts. The trip assembly has an indication assembly including a plunger member and a number of auxiliary switches each structured to be coupled to the housing. The plunger member is structured to actuate each of the number of auxiliary switches, thereby electrically communicating a circuit status to the electrical communication assembly.

First claim

What is claimed is:

1. A trip assembly for an electrical switching apparatus, said electrical switching apparatus comprising a housing, an electrical communication assembly coupled to said housing, separable contacts enclosed by said housing, and an operating mechanism for opening and closing said separable contacts, said trip assembly comprising:
an indication assembly comprising a plunger member and a number of auxiliary switches each structured to be coupled to said housing,
wherein said plunger member is structured to actuate each of said number of auxiliary switches, thereby electrically communicating a circuit status to said electrical communication assembly; wherein said plunger member comprises a planar portion and a cylindrical-shaped receiving portion disposed adjacent and perpendicular the planar portion; wherein said indication assembly further comprises a biasing element disposed in the receiving portion; wherein said biasing element engages the planar portion in order to bias said plunger member away from each of said number of auxiliary switches; wherein said trip assembly further comprises a first mounting member and a second mounting member coupled to said first mounting member by a snap-fit mechanism; wherein each of said first mounting member and said second mounting member is structured to be coupled to said housing; and wherein each of said plunger member, said biasing element, and said number of auxiliary switches is contained by each of said first mounting member and said second mounting member.

2. The trip assembly of claim 1 wherein said number of auxiliary switches comprises a first auxiliary switch and a second auxiliary switch each comprising a body portion and a deflection member disposed on said respective body portion; wherein said plunger member is structured to move between said first auxiliary switch and said second auxiliary switch; and wherein, responsive to said plunger member moving between said first auxiliary switch and said second auxiliary switch, each of said deflection member of said first auxiliary switch and said deflection member of said second auxiliary switch deflects inwardly with respect to said respective body portion in order to electrically communicate the circuit status to said electrical communication assembly.

3. The trip assembly of claim 1 wherein said number of auxiliary switches comprises a first auxiliary switch and a second auxiliary switch; wherein said first mounting member comprises a body, a first protrusion extending from said body, and a second protrusion extending from said body; wherein said second mounting member comprises a second body, a third protrusion extending from said second body, and a fourth protrusion extending from said second body; wherein said first auxiliary switch has a first hole and a second hole; wherein said second auxiliary switch has a third hole and a fourth hole; wherein said first protrusion extends into the first hole; wherein said second protrusion extends into the second hole; wherein said third protrusion extends into the third hole; and wherein said fourth protrusion extends into the fourth hole.

4. A trip assembly for an electrical switching apparatus, said electrical switching apparatus comprising a housing, an electrical communication assembly coupled to said housing, separable contacts enclosed by said housing, and an operating mechanism for opening and closing said separable contacts, said trip assembly comprising:
an indication assembly comprising a plunger member and a number of auxiliary switches each structured to be coupled to said housing,
wherein said plunger member is structured to actuate each of said number of auxiliary switches, thereby electrically communicating a circuit status to said electrical communication assembly; wherein said trip assembly further comprises a mounting member structured to be coupled to said housing; wherein said number of auxiliary switches comprises a first auxiliary switch and a second auxiliary switch; wherein said first auxiliary switch is coupled to said mounting member; wherein said second auxiliary switch comprises a first contact strip and a second contact strip; wherein said first contact strip is connected to said plunger member; wherein said second contact strip is electrically connected to said electrical communication assembly; wherein said operating mechanism comprises a crossbar; wherein said crossbar is structured to drive said plunger member into said first auxiliary switch; and wherein, when said plunger member is driven into said first auxiliary switch, said first contact strip moves away from said second contact strip, thereby electrically communicating the circuit status to said electrical communication assembly.

5. A trip assembly for an electrical switching apparatus, said electrical switching apparatus comprising a housing, an electrical communication assembly coupled to said housing, separable contacts enclosed by said housing, and an operating mechanism for opening and closing said separable contacts, said trip assembly comprising:
an indication assembly comprising a plunger member and a number of auxiliary switches each structured to be coupled to said housing,
wherein said plunger member is structured to actuate each of said number of auxiliary switches, thereby electrically communicating a circuit status to said electrical communication assembly; wherein said electrical switching apparatus further comprises a reset assembly coupled to said housing, wherein said trip assembly further comprises a trip cam structured to cooperate with said reset assembly; and wherein said trip cam comprises a driving leg structured to cooperate with said operating mechanism to trip open said separable contacts.

6. The trip assembly of claim 5 wherein said trip cam further comprises a first recessed retaining portion and a second recessed retaining portion disposed opposite and distal from said first recessed retaining portion; and wherein said driving leg extends from said first recessed retaining portion.

7. The trip assembly of claim 6 wherein said trip cam further comprises a reset leg and a transfer leg; wherein said reset leg extends from said second recessed retaining portion; wherein said transfer leg is disposed between said reset leg and said driving leg; and wherein said transfer leg is spaced from each of said first recessed retaining portion and said second recessed retaining portion.

8. An electrical switching apparatus comprising:
a housing;
an electrical communication assembly coupled to said housing;
separable contacts enclosed by the housing;
an operating mechanism for opening and closing said separable contacts; and
a trip assembly comprising:
an indication assembly comprising a plunger member and a number of auxiliary switches each coupled to said housing,

wherein said plunger member is structured to actuate each of said number of auxiliary switches, thereby electrically communicating a circuit status to said electrical communication assembly; wherein said electrical switching apparatus further comprises a reset assembly coupled to said housing, wherein said trip assembly further comprises a trip cam structured to cooperate with said reset assembly; and wherein said trip cam comprises a driving leg structured to cooperate with said operating mechanism to trip open said separable contacts.

9. The electrical switching apparatus of claim 8 wherein said number of auxiliary switches comprises a first auxiliary switch and a second auxiliary switch each comprising a body portion and a deflection member disposed on said respective body portion; wherein said plunger member is structured to move between said first auxiliary switch and said second auxiliary switch; and wherein, r

Assignees

• Eaton Corp

Inventors

• Kline Kameron James
• Janusek Mark
• Devine Jack Edward
• Turner David

Classifications

• H01H73/38

  reset by lever · CPC title

• H01H71/04

  Means for indicating condition of the switching device {(by means of an auxiliary contact H01H71/46)} · CPC title

• H01H71/465

  Self-contained, easily replaceable microswitches · CPC title

• H01H2235/01

  Spiral spring · CPC title

• H01H73/64

  having only electromagnetic release · CPC title