Flux shunt trip actuator interface and breaker reset mechanism for circuit breaker

Patent metadata

Field	Value
Publication number	US-9466451-B2
Application number	US-201314103871-A
Country	US
Kind code	B2
Filing date	Dec 12, 2013
Priority date	Dec 12, 2013
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

A trip and reset assembly is provided. The trip and reset assembly includes a trip and reset actuator mounting and a trip and reset actuator. The trip and reset actuator is structured to move the plunger from the first position to the second position. The trip and reset actuator mounting includes a body defining a trip and reset actuator pivot coupling first component. The trip and reset actuator includes an elongated body with a pivot coupling second component, an actuator interface, a trip bar interface and a reset interface. The trip and reset actuator body is movably coupled to the trip and reset actuator mounting and is movable between a first position, wherein the trip bar interface engages the trip bar, and a second position, wherein the actuator interface engages the plunger.

First claim

What is claimed is:

1. A trip and reset assembly for a trip unit assembly of an electrical switching apparatus, said electrical switching apparatus including an operating mechanism, said operating mechanism including a reset member, said trip unit assembly including a housing assembly, a trip bar and a trip actuator assembly with a plunger, said trip bar structured to move between a first position and a second position, said plunger structured to move axially between a first, extended position and a second retracted position, wherein, when said plunger moves to said plunger first extended position said plunger engages said trip bar and moves said trip bar into said trip bar first position, said trip actuator assembly structured to move said plunger in one direction, said trip and reset assembly comprising:
a trip and reset actuator mounting;
a trip and reset actuator, said trip and reset actuator disposed adjacent said operating mechanism reset member;
said trip and reset actuator structured to move said plunger from said first position to said second position;
said trip and reset actuator mounting including a body defining a trip and reset actuator pivot coupling first component;
said trip and reset actuator including an elongated body with a pivot coupling second component, an actuator interface, a trip bar interface and a reset interface;
said trip and reset actuator body movably coupled to said trip and reset actuator mounting and movable between a first position, wherein said trip bar interface engages said trip bar, and a second position, wherein said actuator interface engages said plunger;
said trip and reset actuator body includes a first end, a medial portion and a second end;
said trip bar interface disposed at said trip and reset actuator body first end;
said pivot coupling second component disposed at said trip and reset actuator body medial portion; and
said reset interface disposed at said trip and reset actuator body second end, said reset interface is structured to engage said operating mechanism reset member.

2. The trip and reset assembly of claim 1 wherein said trip and reset actuator body is pivotally coupled to said trip and reset actuator mounting.

3. The trip and reset assembly of claim 1 wherein said trip and reset actuator mounting body is unitary with said trip unit assembly housing assembly.

4. The trip and reset assembly of claim 1 wherein said trip bar interface is a generally curvilinear cam surface.

5. The trip and reset assembly of claim 1 wherein:
said trip actuator includes a coil and an energizing circuit;
said coil disposed substantially about said plunger when said plunger is in said second position;
said energizing circuit coupled to, and in electrical communication with, said coil; and
said energizing circuit structured to store a charge of between about 22 volts and 28 volts.

6. The trip and reset assembly of claim 1 wherein said trip and reset actuator is a unitary body.

7. The trip and reset assembly of claim 1 wherein said electrical switching apparatus operating mechanism includes a number of fixed contacts and a number of movable contacts, said operating mechanism operatively coupled to each movable contact and structured to move each movable contact, wherein each said movable contact is movable between an open, first position, wherein the movable contact is spaced from a fixed contact, and, a closed, second position, wherein the movable contact is directly coupled to, and in electrical communication with, a fixed contact, wherein said operating mechanism is movable between three configurations, a first configuration, wherein each movable contact is spaced from a fixed contact, a closed, second configuration, wherein each movable contact is directly coupled to, and in electrical communication with, a fixed contact and wherein said operating mechanism is biased toward said first configuration, and a reset configuration, and wherein:
when said operating mechanism moves to said reset configuration, said operating mechanism reset member engages said reset actuator body reset interface;
wherein, when said plunger moves into said plunger first position, said plunger engages said actuator interface and moves said trip and reset actuator body into said trip and reset actuator body first position, and, when said trip and reset actuator body moves into said trip and reset actuator body first position, said trip bar interface engages said trip bar and moves said trip bar to said trip bar first position; and
wherein when said operating mechanism moves into said reset configuration, said operating mechanism reset member engages said reset interface and moves said trip and reset actuator body into said trip and reset actuator body second position, and, when said trip and reset actuator body moves into said trip and reset actuator body second position, said actuator interface engages said plunger and moves said plunger into said plunger second position.

8. A trip unit assembly for an electrical switching apparatus, wherein said electrical switching apparatus includes an operating mechanism, a number of fixed contacts and a number of movable contacts, said operating mechanism including a reset member, said operating mechanism operatively coupled to each movable contact and structured to move each movable contact, wherein each said movable contact is movable between an open, first position, wherein the movable contact is spaced from a fixed contact, and, a closed, second position, wherein the movable contact is directly coupled to, and in electrical communication with, a fixed contact, wherein said operating mechanism is movable between three configurations, a first configuration, wherein each movable contact is spaced from a fixed contact, a closed, second configuration, wherein each movable contact is directly coupled to, and in electrical communication with, a fixed contact and wherein said operating mechanism is biased toward said first configuration, and a reset configuration, said trip unit assembly comprising:
a housing assembly defining a cavity;
a trip bar, said trip bar operatively coupled to said operating mechanism, said trip bar movable between a first position, wherein said trip bar does not restrain the movement of said operating mechanism, and a second position, wherein said trip bar restrains the movement of said operating mechanism;
a trip actuator assembly including a plunger, said plunger structured to move axially between a first, extended position and a second retracted position, wherein, when said plunger moves to said plunger first extended position said plunger engages said trip bar and moves said trip bar into said trip bar first position, said trip actuator assembly structured to move said plunger from said plunger second position to said plunger first position;
a trip and reset assembly including a trip and reset actuator mounting and a trip and reset actuator, said trip and reset assembly structured to move said plunger from said first position to said second position;
said trip and reset actuator mounting including a body defining a reset actuator pivot coupling first component;
said trip and reset actuator including an elongated body with a pivot coupling second component, an actuator interface, a trip bar interface and a reset interface;
said trip and reset actuator disposed adjacent said operating mechanism reset member;
said trip and reset actuator body movably coupled to said trip and reset actuator mounting and movable between a first position, wherein said trip bar interface engages said trip bar, and a second position, wherein said actuator interface engages said plunger;
said trip and reset actuator body includes a first end, a medial portion and a second end;
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Assignees

• Eaton Corp

Inventors

• Carlino Harry James
• Maloney Lloyd Allen
• Bucchi Martha Suryani
• Janusek Mark Anthony

Classifications

• H01H2071/124

  with a hybrid structure, the solid state trip device being combined with a thermal or a electromagnetic trip · CPC title

• H01H50/44

  Magnetic coils or windings · CPC title

• H01H3/54

  Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts · CPC title

• H01H50/64 Primary

  Driving arrangements between movable part of magnetic circuit and contact (structurally associated with contact spring sets H01H50/58) · CPC title

• H01H50/18

  Movable parts of magnetic circuits, e.g. armature · CPC title