Multi-pole molded case circuit breaker with insulation barrier for rotary pin

Patent metadata

Field	Value
Publication number	US-10347453-B2
Application number	US-201715462636-A
Country	US
Kind code	B2
Filing date	Mar 17, 2017
Priority date	Aug 31, 2016
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

Provided is a multi-pole molded case circuit breaker (MCCB) with an insulation barrier for a rotary pin, in which an insulation barrier is provided in a rotary pin for inter-phase power transmission to prevent dielectric breakdown. The multi-pole MCCB includes a shaft assembly having a movable contactor and having a plurality of rotary pin holes formed in a penetrating manner, a base assembly to which the shaft assembly is rotatably accommodated to be coupled, a switching mechanism coupled to an upper portion of the base assembly and rotating the shaft assembly, a plurality of rotary pins coupled to the plurality of rotary pin holes in a penetrating manner, and an insulation barrier formed of an insulating material and covering the plurality of rotary pins.

First claim

What is claimed is:

1. A multi-pole molded case circuit breaker (MCCB) comprising:
a shaft assembly having a movable contactor and having a plurality of rotary pin holes formed in a penetrating manner;
a base assembly which the shaft assembly is rotatably accommodated in and coupled to;
a switching mechanism coupled to an upper portion of the base assembly and rotating the shaft assembly;
a plurality of rotary pins respectively coupled to the plurality of rotary pin holes in a penetrating manner;
a correction link for correcting a movement of the plurality of rotary pins, wherein the correction link is provided on an outer side of the switching mechanism; and
an insulation barrier formed of an insulating material to cover the plurality of rotary pins and the correction link,
wherein the insulation barrier includes:
a plurality of pipe parts formed in the form of a pipe to cover the plurality of rotary pins and
a plate part vertically connecting one end of each of the plurality of pipe parts to cover the correction link, and

wherein the plurality of pipe parts substantially cover an entirety of the length of the rotary pins.

2. The multi-pole MCCB of claim 1 , wherein each of the plurality of rotary pin holes and each of the plurality of rotary pins are provided as a pair.

3. The multi-pole MCCB of claim 1 , wherein the plate part has a cover part extending in a direction opposite to a direction of the pair of pipe parts along a circumference to cover the correction link connecting the plurality of rotary pins.

4. The multi-pole MCCB of claim 3 , wherein a link insertion recess allowing the correction link to be inserted and fixed thereto is formed on an inner side of the cover part.

5. The multi-pole MCCB of claim 3 , wherein the cover part has a cutaway part opening a portion of the cover part.

6. The multi-pole MCCB of claim 1 , wherein the plurality of rotary pin holes are formed to be greater than an outer diameter of the insulation barrier.

7. The multi-pole MCCB of claim 3 , wherein a link circumference recess allowing a circumferential portion of the correction link to be inserted therein is formed on an inner side of the cover part.

8. The multi-pole MCCB of claim 2 , wherein a lower link is exposed to a lower side of the switching mechanism, and any one of the plurality of rotary pins is coupled to a hole of the lower link in a penetrating manner.

Assignees

• Lsis Co Ltd

Inventors

• Oh Kyunghwan

Classifications

• H01H71/0235

  Contacts and the arc extinguishing space inside individual separate cases, which are positioned inside the housing of the circuit breaker (casettes for rotating bridges see H01H1/2058) · CPC title

• H01H71/1009 Primary

  Interconnected mechanisms (H01H71/1045 takes precedence; operated by excess current and other electrical conditions H01H83/20) · CPC title

• H01H2050/028

  Means to improve the overall withstanding voltage, e.g. creepage distances · CPC title

• H01H71/082

  Connections between juxtaposed circuit breakers · CPC title

• H01H9/48

  Means for preventing discharge to non-current-carrying parts, e.g. using corona ring · CPC title