# US 8,569,637 B2 · Interlock apparatus for solid insulated switchgear

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- Number: US 8,569,637 B2
- Document ID: US8569637B2
- Status: Granted
- Kind: B2
- Application number: 13/158,293
- Filed: 2011-06-10
- Published: 2011-12-15
- Granted: 2013-10-29
- Earliest claimed: 2010-06-10
- Assignees: Lsis Co., Ltd.
- Applicants: Jeong Mu Byeon
- Inventors: Jeong Mu Byeon
- Web page: https://patentgrep.com/patent/US8569637B2

## CPC

- H01H 9/26: for interlocking two or more switches ({H01H13/568 takes precedence;} by a detachable member H01H9/28 {; for electromagnetic relays H01H50/323})
- H01H 3/3015: {using cam devices}
- H01H 2003/3068: {Housing support frame for energy accumulator and cooperating mechanism}
- 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

For a solid-insulated switchgear in which a main circuit switching mechanism and a ground circuit switching mechanism are provided laterally, and there is disclosed an interlock apparatus for the solid-insulated switchgear comprising a first interlock mechanism connected to a switching shaft of the ground circuit switching mechanism to press the on shaft of the main circuit switching mechanism to be at the locking position or release the on shaft of the main circuit switching mechanism; and a second interlock mechanism connected to the switching shaft of the main circuit switching mechanism in an interlocking manner to press the on shaft of the ground circuit switching mechanism to be at the locking position or release the on shaft of the ground circuit switching mechanism.

## Claims

### Claim 1

An interlock apparatus for a solid-insulated switchgear having a main circuit switching mechanism and a ground circuit switching mechanism, wherein the main circuit switching mechanism and ground circuit switching mechanism are provided laterally in a horizontal direction and each include a switching shaft, a switching shaft lever supported by the switching shaft to be rotated together, a closing button for manual closing operation, an on-shaft connected to the closing button and having a released position for moving the main circuit switching mechanism to a closing position and the ground circuit switching mechanism to a ground position, and a locking position for locking the main circuit switching mechanism and ground circuit switching mechanism such that the main circuit switching mechanism is prevented from moving to a closing position simultaneously with the ground circuit switching mechanism moving to a ground position, the interlock apparatus comprising:
a first interlock mechanism provided between the main circuit switching mechanism and ground circuit switching mechanism and connected to the switching shaft of the ground circuit switching mechanism in an interlocking manner to press the on-shaft of the main circuit switching mechanism into the locking position or to release the on-shaft on shaft of the main circuit switching mechanism; and
a second interlock mechanism provided between the main circuit switching mechanism and ground circuit switching mechanism and connected to the switching shaft of the main circuit switching mechanism in an interlocking manner to press the on-shaft of the ground circuit switching mechanism into the locking position or to release the on-shaft of the ground circuit switching mechanism.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the first interlock mechanism comprises:
a first driving lever configured to press and lock the on-shaft of the main circuit switching mechanism or to release the on-shaft of the main circuit switching mechanism; and
a first power transmission spring connected between the switching shaft lever of the ground circuit switching mechanism and the first driving lever to transmit a driving force to the first driving lever such that the first driving lever is rotated to a position for locking the on-shaft of the main circuit switching mechanism when the switching shaft lever of the ground circuit switching mechanism is rotated to a ground position.

### Claim 3 (depends on 2)

The apparatus of claim 2, wherein the first driving lever is provided with a first support pin and the switching shaft lever of the ground circuit switching mechanism is provided with a second support pin, each of which support an end portion of the first power transmission spring.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the second interlock mechanism comprises:
a second driving lever configured to press and lock the on-shaft of the ground circuit switching mechanism or to release the on-shaft of the ground circuit switching mechanism; and
a power transmission mechanism connected between the switching shaft lever of the main circuit switching mechanism and the second driving lever to transmit a driving force to the second driving lever such that the second driving lever is rotated to a position for locking the on-shaft of the ground circuit switching mechanism when the switching shaft lever of the main circuit switching mechanism is rotated to a closing position.

### Claim 5 (depends on 4)

The apparatus of claim 4, wherein the power transmission mechanism comprises:
a second power transmission spring, a first portion of which is connected to the switching shaft lever of the main circuit switching mechanism to transmit a rotational driving force of the switching shaft lever of the main circuit switching mechanism; and
a link, a first end portion of which is connected to a second end portion of the second power transmission spring and the second end portion of which is connected to the second driving lever to transmit a driving force from the second power transmission spring to the second driving lever.

### Claim 6 (depends on 5)

The apparatus of claim 5, wherein the link is provided with a third support pin and the switching shaft lever of the main circuit switching mechanism is provided with a fourth support pin, each of which support an end portion of the second power transmission spring.

### Claim 7 (depends on 1)

The apparatus of claim 1, further comprising:
a supporting base configured to support the first interlock mechanism and the second interlock mechanism.