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Operating mechanism for controlling an earthing switch of a medium voltage switchgear

A technology of grounding switch and operating mechanism, which is applied in the direction of grounding switch, contact operating mechanism, parts of protective switch, etc., and can solve problems such as danger, moving away, and arc generation

Pending Publication Date: 2021-10-22
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the event of a short circuit current, the movable contact may move away from the fixed contact, causing arcing with very dangerous consequences

Method used

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  • Operating mechanism for controlling an earthing switch of a medium voltage switchgear
  • Operating mechanism for controlling an earthing switch of a medium voltage switchgear
  • Operating mechanism for controlling an earthing switch of a medium voltage switchgear

Examples

Experimental program
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Embodiment Construction

[0038] With reference to the above figures, the present invention relates to an operating mechanism 1 for controlling an earthing switch usable in medium voltage applications. For the purposes of the present invention, the term "medium voltage" (MV) denotes operating voltages above 1 kV up to tens of kV (eg 70 kV AC and 100 kV DC).

[0039] The operating mechanism 1 can be used in medium voltage switchgear and is operatively connected to an earthing switch (not shown in the figure), which is arranged in a position relatively far away from the operating mechanism 1 (typically 1 to 2 meters away) . The operating mechanism 1 can be used independently of the configuration of the mechanism provided to rotate the earthing switch of the movable contact.

[0040] The operating mechanism 1 is arranged in a housing 80 which can be connected to the switchgear or can be part of the switchgear. The housing 80 includes a base 81 and two opposite side portions 81A, 81B extending orthogonal...

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PUM

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Abstract

The present invention relates to an operating mechanism (1) for medium voltage earthing switch comprising an operating disk (10) rotating about a main axis (100), a connecting assembly (11) which connects operatively said operating disk (10) to said earthing switch. The operating mechanism (1) also comprises an operating lever (12) for rotating said disk (10) from a first angular position to a second angular position according to a closing movement (Wl) and from second angular position to said first angular position according to an opening movement (W2). According to the invention the operating mechanism (1) comprises an interlock assembly (15) that prevents a re-closing movement of said disk (10) when, starting from said second angular position and according to said opening movement, said disk (10) reaches a pre-established angle (alpha).

Description

technical field [0001] The invention relates to an electrical switchgear for medium voltage applications. More particularly, the present invention relates to an operating mechanism for controlling an earthing switch arranged to be installed in a medium voltage switchgear. Background technique [0002] Electrical switchgear is well known in electrical power transmission and distribution grids. They generally consist of a metal cabinet internally divided into several compartments or compartments that house various devices and equipment. In many applications, electrical switching apparatus includes switching devices of the withdrawable type (e.g. circuit breakers), i.e. such switching devices are reversibly movable between a first position (inserted position) and a second position (drawn position), In the first position, the switching device is electrically connected to the disconnecting contact of the switching device, in the second position the switching device is electrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H31/00H01H31/04
CPCH01H31/003H01H31/006H01H31/04H01H3/3015H01H2003/3057H01H33/6661H01H3/3047H01H71/505H01H71/504H01H71/128
Inventor S·兰巴尔迪尼A·阿瓦提
Owner ABB (SCHWEIZ) AG
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