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Disconnector Switch or Earthing Switch for Gas Insulated Switch-Gear with a Magnetic Actuator

IP.com Disclosure Number: IPCOM000207414D
Original Publication Date: 2011-May-30
Included in the Prior Art Database: 2011-May-30
Document File: 2 page(s) / 142K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

The drives operating the actuating mechanism of modern disconnector and earthing switches in Gas Insulated Switch gear (GIS) are generally spring powered or they are utilizing an electric motor. Disconnectors are used for no-load closing and opening operations. Earthing switches earth isolated circuits. Disconnector switches can be found in two types, a slow and a fast switching type. Due to these disconnector types the requirements for the operating actuating mechanism are diverse. However, within the kinematic chain, from the drive to the contact pins of a disconnector or earthing switch, mechanically moving parts are the weakest link. Nonetheless, disconnector or earthing switches are subject to high endurance requirements which nearly meet the endurance level of circuit breakers.

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Disconnector Switch or Earthing Switch for Gas Insulated Switch-Gear with a Magnetic Actuator

Idea: Vikas Vishwasrao Jakate, IN-Aurangabad

The drives operating the actuating mechanism of modern disconnector and earthing switches in Gas Insulated Switch gear (GIS) are generally spring powered or they are utilizing an electric motor. Disconnectors are used for no-load closing and opening operations. Earthing switches earth isolated circuits. Disconnector switches can be found in two types, a slow and a fast switching type. Due to these disconnector types the requirements for the operating actuating mechanism are diverse. However, within the kinematic chain, from the drive to the contact pins of a disconnector or earthing switch, mechanically moving parts are the weakest link. Nonetheless, disconnector or earthing switches are subject to high endurance requirements which nearly meet the endurance level of circuit breakers.

State of the art circuit breakers are known, which utilize magnetic actuating mechanisms. Such devices are popular with medium voltage applications. Due to their magnetic actuating mechanisms such circuit breakers can have an endurance level of up to 30000 switching operations without any maintenance.

In the following a novel disconnector and earthing switch drive for GIS applications is proposed which minimizes the mechanically moving parts within the drive and thus increases the reliability and the endurance level of such...