# US 12,002,638 B2 · Bypass switch

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- Number: US 12,002,638 B2
- Document ID: US12002638B2
- Status: Granted
- Kind: B2
- Application number: 17/612,059
- Filed: 2020-04-24
- Published: 2022-08-04
- Granted: 2024-06-04
- Earliest claimed: 2019-05-24
- Assignees: Ls Electric Co., Ltd.
- Applicants: Ls Electric Co., Ltd.
- Inventors: Gyeongho Lee
- Web page: https://patentgrep.com/patent/US12002638B2

## CPC

- H01H 33/662: Housings or protective screens
- H01H 33/6606: {Terminal arrangements}
- H01H 33/664: Contacts; Arc-extinguishing means, e.g. arcing rings
- H01H 33/666: Operating arrangements
- H01H 39/004: {Closing switches}
- H01H 79/00: Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected {(H01H39/004 takes precedence)}
- H01H 2033/6665: {Details concerning the mounting or supporting of the individual vacuum bottles}
- 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

The present disclosure relates to a bypass switch used in a super-high voltage direct current transmission sub-module including a case; a first bus bar; a second bus bar; a fixing contact provided in a hollow part and connected to the first bus bar; a movable contact provided in the hollow part, and connected to the second bus bar so as to come into contact with or be separated from the fixing contact; an insulating cover coupled to the rear surface of the second bus bar, and having an accommodation part therein; a movable part extension rod provided on the accommodation part and coupled to the movable contact; and an actuator provided on the rear part of the insulating cover, and providing power for moving the movable part extension rod.

## Claims

### Claim 1

A bypass switch comprising:
a case in which a hollow part is defined;
a first bus bar coupled to a front end of the case;
a second bus bar coupled to a rear end of the case;
a fixed contact disposed in the hollow part and connected to the first bus bar;
a movable contact disposed in the hollow part and connected to the second bus bar to be brought into contact with or separated from the fixed contact;
an insulating cover coupled to a rear surface of the second bus bar and having an accommodation part therein;
a movable part extension rod disposed in the accommodation part and coupled to the movable contact; and
an actuator disposed on the rear of the insulating cover to apply power to move the movable part extension rod,
wherein a fixing part is stepped with an increased diameter on a front end part of the insulating cover, and
wherein the insulating cover is integrally coupled to the second bus bar and the case by coupling members coupled to the fixing part.

### Claim 2 (depends on 1)

The bypass switch of claim 1, wherein the second bus bar includes a contactor connection part implemented as a through hole, and
wherein the bypass switch further comprises a multi-contactor socket inserted into the contactor connection part, formed in a cylindrical shape to surround and support the movable part extension rod.

### Claim 3 (depends on 2)

The bypass switch of claim 2, further comprising a multi-contactor closely disposed between the multi-contactor socket and the movable part extension rod.

### Claim 4 (depends on 1)

The bypass switch of claim 1, further comprising an end cover coupled to the rear of the insulating cover and having a mounting part in a shape of a groove in which the actuator is disposed.

### Claim 5 (depends on 4)

The bypass switch of claim 4, further comprising a contact spring disposed between the movable part extension rod and the end cover to apply contact pressure to the movable contact.

### Claim 6 (depends on 5)

The bypass switch of claim 5, wherein the end cover is provided with a central pipe part inserted into a cover through hole of the insulating cover to support the contact spring.

### Claim 7 (depends on 6)

The bypass switch of claim 6, wherein the movable part extension rod is provided with an operation part formed in a shape of a groove open rearward, and
wherein the bypass switch further comprises a push rod disposed on a front surface of the operation part to receive force of the contact spring.

### Claim 8 (depends on 4)

The bypass switch of claim 4, wherein the mounting part is provided with a cap to fix the actuator.

### Claim 9 (depends on 1)

The bypass switch of claim 1, further comprising:
a permanent magnet coupled to a rear surface of the accommodation part; and
a latch plate coupled to the movable part extension rod, and attracted to the permanent magnet in a normal state such that the movable contact is separated from the fixed contact.

### Claim 10 (depends on 9)

The bypass switch of claim 9, further comprising an outer holder and an inner holder respectively disposed on both side surfaces of the permanent magnet to support the permanent magnet.

### Claim 11

A bypass switch comprising:
a case in which a hollow part is defined;
a first bus bar coupled to a front end of the case;
a second bus bar coupled to a rear end of the case;
a fixed contact disposed in the hollow part and connected to the first bus bar;
a movable contact disposed in the hollow part and connected to the second bus bar to be brought into contact with or separated from the fixed contact;
an insulating cover coupled to a rear surface of the second bus bar and having an accommodation part therein;
a movable part extension rod disposed in the accommodation part and coupled to the movable contact;
an actuator disposed on the rear of the insulating cover to apply power to move the movable part extension rod;
an end cover coupled to the rear of the insulating cover and having a mounting part in a shape of a groove in which the actuator is disposed;
a contact spring disposed between the movable part extension rod and the end cover to apply contact pressure to the movable contact, wherein the end cover is provided with a central pipe part inserted into a cover through hole of the insulating cover to support the contact spring.

### Claim 12

A bypass switch comprising:
a case in which a hollow part is defined;
a first bus bar coupled to a front end of the case;
a second bus bar coupled to a rear end of the case;
a fixed contact disposed in the hollow part and connected to the first bus bar;
a movable contact disposed in the hollow part and connected to the second bus bar to be brought into contact with or separated from the fixed contact;
an insulating cover coupled to a rear surface of the second bus bar and having an accommodation part therein;
a movable part extension rod disposed in the accommodation part and coupled to the movable contact;
an actuator disposed on the rear of the insulating cover to apply power to move the movable part extension rod; and
an end cover coupled to the rear of the insulating cover and having a mounting part in a shape of a groove in which the actuator is disposed;
wherein the mounting part is provided with a cap to fix the actuator.