# US 10,770,249 B2 · Pole part for a low-, medium or high voltage circuit breaker, and method for manufacturing the same

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- Number: US 10,770,249 B2
- Document ID: US10770249B2
- Status: Granted
- Kind: B2
- Application number: 16/255,911
- Filed: 2019-01-24
- Published: 2019-05-23
- Granted: 2020-09-08
- Earliest claimed: 2016-07-27
- Assignees: ABB Schweiz AG
- Applicants: ABB Schweiz AG
- Inventors: Dietmar Gentsch
- Web page: https://patentgrep.com/patent/US10770249B2

## CPC

- H01H 33/66207: {Specific housing details, e.g. sealing, soldering or brazing}
- H01H 33/42: Driving mechanisms
- H01H 2033/6623: {Details relating to the encasing or the outside layers of the vacuum switch housings}
- H01H 2209/002: Materials
- H01H 2209/012: avoiding too large deformation or stress
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

A pole part for a medium or high voltage circuit breaker includes: an insert in an insulating housing; and a compensation layer between the insert and the insulating housing. The compensation layer includes a potting material on an epoxy or polyurethane basis, with a shore hardness of 12 to 90 shore A.

## Claims

### Claim 1

A pole part for a medium or high voltage circuit breaker, comprising:
an insulating housing;
a vacuum interrupter; and
a compensation layer,
wherein the vacuum interrupter is in the insulating housing,
wherein the compensation layer is in contact with a surface of the vacuum interrupter,
wherein the compensation layer is between the vacuum interrupter and the insulating housing, and
wherein the compensation layer comprises an epoxy based potting material with a shore hardness of 12 to 90 shore A.

### Claim 2 (depends on 1)

The pole part according to claim 1, wherein the compensation layer extends over an interface between the vacuum interrupter and an upper connection part, and
wherein the insulating housing covers the interface.

### Claim 3 (depends on 1)

The pole part according to claim 1, wherein the compensation layer covers an upper connection part, and
wherein the upper connection part with the compensation layer is covered by the insulating housing.

### Claim 4 (depends on 1)

A low-, medium-, or high voltage switchgear, comprising:
the pole part according to claim 1.

### Claim 5 (depends on 1)

The pole part according to claim 1, wherein the compensation layer has been moulded onto the vacuum interrupter.

### Claim 6 (depends on 5)

The pole part according to claim 5, wherein the insulating housing has been moulded onto the vacuum interrupter with the compensation layer or the vacuum interrupter with the compensation layer has been moulded into the insulating housing.

### Claim 7 (depends on 1)

The pole part according to claim 1, wherein the insulating housing comprises an epoxy or polyurethane material having a shore hardness bigger than the shore hardness of the epoxy based potting material of the compensation layer.

### Claim 8

A method for manufacturing a pole part for a low-, medium-, or high voltage circuit breaker, comprising:
moulding a compensation layer onto a surface of a vacuum interrupter; and
moulding an insulating housing onto the vacuum interrupter with the compensation layer or moulding the vacuum interrupter with the compensation layer into the insulating housing,
wherein the compensation layer is between the vacuum interrupter and the insulating housing, and
wherein the compensation layer comprises an epoxy based potting material with a shore hardness of 12 to 90 shore A.

### Claim 9 (depends on 8)

The method according to claim 8, wherein the insulating housing comprises an epoxy or polyurethane material with a shore hardness bigger than a selected shore hardness of the epoxy based potting material of the compensation layer to provide a hardness relation, and
wherein the hardness relation is reached at an end of a final moulding step of the insulating housing.

### Claim 10 (depends on 8)

The method according to claim 8, wherein the moulding of the compensation layer extends over an interface between the vacuum interrupter and an upper connection part, and
wherein moulding the insulating housing onto the vacuum interrupter with the compensation layer or moulding the vacuum interrupter with the compensation layer into the insulating housing comprises the insulating housing covering the interface.

### Claim 11 (depends on 10)

The method according to claim 10, wherein the moulding of the compensation layer covers the upper connection part, and
wherein moulding the insulating housing onto the vacuum interrupter with the compensation layer or moulding the vacuum interrupter with the compensation layer into the insulating housing comprises the upper connection part with the compensation layer being covered by the insulating housing.