# US 10,121,625 B2 · 3-way disconnector and earth switch for gas insulated switchgear > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,625 B2 - Document ID: US10121625B2 - Status: Granted - Kind: B2 - Application number: 15/462,724 - Filed: 2017-03-17 - Published: 2018-07-12 - Granted: 2018-11-06 - Earliest claimed: 2017-01-06 - Assignees: Lsis Co., Ltd. - Applicants: Lsis Co., Ltd. - Inventors: Ruiqiang Liu - Web page: https://patentgrep.com/patent/US10121625B2 ## CPC - H01H 71/10: Operating or release mechanisms - H01H 3/04: Levers (tumblers H01H23/14) - H01H 3/44: using Geneva movement - H01H 3/46: using rod or lever linkage, e.g. toggle - H01H 9/0072: {particular to three-phase switches (synchronous switching H01H9/563)} - H01H 31/003: {Earthing switches (H01H31/02 - H01H31/26 take precedence; contact made by liquid jet H01H29/32; for substations H02B1/16, H02B5/01; for withdrawable switchgear H02B11/28; for gas-insulated switchgear H02B13/075)} - H01H 31/32: with rectilinearly-movable contact - H01H 33/122: {both breaker and sectionaliser being enclosed, e.g. in SF6-filled container} - H01H 33/42: Driving mechanisms - H01H 1/38: Plug-and-socket contacts - H01H 33/64: wherein the break is in gas (vacuum switches H01H33/66) - H02B 13/075: Earthing arrangements - 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) - H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER ## Abstract The 3-way disconnector and an earth switch for a gas insulated switchgear includes: a movable portion including a disconnector movable portion and an earth switch movable portion; a disconnector mover and an earth switch mover installed in the disconnector movable portion and the earth switch movable portion so as to be linearly movable; a driving lever rotatably installed between the disconnector mover and the earth switch mover; and a first lever and a second lever rotated by receiving a rotational force of the driving lever, and configured to move the disconnector mover and the earth switch mover, respectively, wherein a driver is protruded at one side of the driving lever, and a driving pin is provided at an end of the driver, and wherein the driving pin is configured to selectively move one of the first and second levers. ## Claims ### Claim 1 A three-way disconnector and an earth switch for a gas insulated switchgear, comprising: a movable portion including a disconnector movable portion and an earth switch movable portion; a disconnector mover and an earth switch mover installed in the disconnector movable portion and the earth switch movable portion so as to be linearly movable; a driving lever rotatably installed between the disconnector mover and the earth switch mover; and a first lever and a second lever rotated by receiving a rotational force of the driving lever, and configured to move the disconnector mover and the earth switch mover, respectively, wherein a driver is protruded at one side of the driving lever, and a driving pin is provided at an end of the driver, wherein the driving pin is configured to selectively move one of the first and second levers, wherein the disconnector mover is provided with a first cut-out groove at a rear end thereof, and a first pin is provided to cross the first cut-out groove, and wherein the earth switch mover is provided with a second cut-out groove at a rear end thereof, and a second pin is provided to cross the second cut-out groove. ### Claim 2 (depends on 1) The three-way disconnector and the earth switch for the gas insulated switchgear of claim 1, wherein a first sliding hole to which the first pin is slidably coupled is formed at a part of the first lever, and a second sliding hole to which the second pin is slidably coupled is formed at the second lever. ### Claim 3 (depends on 1) The three-way disconnector and the earth switch for the gas insulated switchgear of claim 1, wherein a first sliding groove for inserting the driving pin is formed at the first lever, and a second sliding groove for inserting the driving pin is formed at the second lever, wherein when the driving pin is inserted into the first sliding groove, the disconnector mover is moved, and wherein when the driving pin is inserted into the second sliding groove, the earth switch mover is moved. ### Claim 4 (depends on 3) The three-way disconnector and the earth switch for the gas insulated switchgear of claim 3, wherein the first and second levers are provided with upper fingers and lower fingers formed at upper and lower parts of the first and second sliding grooves. ### Claim 5 (depends on 4) The three-way disconnector and the earth switch for the gas insulated switchgear of claim 4, wherein the upper finger of the first lever and the upper finger of the second lever are installed to cross each other. ### Claim 6 (depends on 4) The three-way disconnector and the earth switch for the gas insulated switchgear of claim 4, wherein each of the upper fingers has a cut-out portion at one side thereof. ### Claim 7 (depends on 1) The three-way disconnector and the earth switch for the gas insulated switchgear of claim 1, wherein the first and second levers are formed to have the same shape, and are installed to be symmetrical with each other. ### Claim 8 (depends on 3) The three-way disconnector and the earth switch for the gas insulated switchgear of claim 3, wherein the driving pin commonly contacts the first and second sliding grooves at a neutral position.