Electronic trip device for molded case circuit breaker

Patent metadata

Field	Value
Publication number	US-11257648-B2
Application number	US-201816954858-A
Country	US
Kind code	B2
Filing date	Dec 11, 2018
Priority date	Feb 6, 2018
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

The present invention relates to a trip device for a molded case circuit breaker and, more specifically, to an electronic trip device for a molded case circuit breaker. The electronic trip device for a molded case circuit breaker, according to one embodiment of the present invention, comprises: a trip part case having a plurality of phases; a trip part terminal provided at the rear surface part of the trip part case and provided for each phase; and a voltage sensing conductor coupled between the rear surface part and the trip part terminal and provided for each phase, wherein the voltage sensing conductor provided for each phase is formed to have the same shape and the same size.

First claim

The invention claimed is:

1. An electronic trip device for a molded case circuit breaker, the electronic trip device comprising:
a trip part case having a plurality of phases;
a trip part terminal provided at a rear surface part of the trip part case and provided for each phase; and
a voltage sensing conductor coupled between the rear surface part and the trip part terminal and provided for each phase,
wherein the voltage sensing conductor provided for each phase is formed to have a same shape and a same size,
wherein the trip part case is provided with an accommodating groove for each phase, formed in the rear surface part thereof to accommodate the voltage sensing conductor,
wherein the accommodating groove is provided with a coupling groove in which the trip part terminal and the voltage sensing conductor are coupled to each other, and
wherein the voltage sensing conductor is provided with a coupling hole formed at a position corresponding to the coupling groove.

2. The electronic trip device of claim 1 , wherein the trip part case is provided with an accommodating portion for each phase, and
wherein a partition wall is formed between accommodating portions.

3. The electronic trip device of claim 2 , wherein the accommodating portion is provided with a connection conductor installation portion in which a connection conductor for connecting the trip part terminal and a load side terminal is inserted.

4. The electronic trip device of claim 3 , wherein the trip part case is provided with an arrangement groove formed in the rear surface part thereof for arranging wires, and
wherein the arrangement groove is provided to correspond to a height of the connection conductor installation portion.

5. The electronic trip device of claim 4 , wherein the voltage sensing conductor is provided with a bent portion inserted into the arrangement groove.

6. The electronic trip device of claim 3 , wherein the voltage sensing conductor is provided with a cutout portion for avoiding interference with the connection conductor.

7. The electronic trip device of claim 1 , wherein the trip part case is provided with an upper accommodating portion formed in a top thereof for accommodating a control panel.

8. The electronic trip device of claim 7 , wherein the upper accommodating portion is provided with a through hole for each phase, through which a contact portion formed on an end portion of the voltage sensing conductor is inserted, and
wherein the through hole provided for each phase is formed in a same shape and a same size.

9. The electronic trip device of claim 8 , wherein the contact portion inserted through the through hole is formed on an upper portion of one side of the voltage sensing conductor.

10. The electronic trip device of claim 8 , wherein the control panel is provided with a coupling groove at a position corresponding to the through hole.

11. The electronic trip device of claim 10 , wherein the control panel is coupled with a cover member covering the coupling hole.

12. The electronic trip device of claim 1 ,
wherein the accommodating groove provided for each phase is formed in a same shape and a same size.

Assignees

• Ls Electric Co Ltd

Inventors

• Cho Seongyeol

Classifications

• H01H71/125

  characterised by sensing elements, e.g. current transformers (for differential protection H01H83/144) · CPC title

• H01H71/02

  Housings; Casings; Bases; Mountings · CPC title

• H01H2071/0292

  Housing or frames containing grooves or slots for guiding movable parts · CPC title

• H01H2071/0242

  Assembling parts of a circuit breaker by using snap mounting techniques · CPC title

• H01H71/123

  using a solid-state trip unit (circuits H02H) · CPC title