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Multi-phase medium voltage contactor

A contactor and moving contact technology, applied in high-voltage air circuit breakers, contact operating mechanisms, high-voltage/high-current switches, etc., can solve complex problems, cannot ensure reliability, open speed load or contactor damage, etc.

Inactive Publication Date: 2014-09-24
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is usually a complex operation, since the opening must be performed within well-defined time limits
Unfortunately, 100% reliability cannot be ensured so far in the case of manual drive operation; indeed a wrong opening speed can cause damage to the load or the contactor itself

Method used

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  • Multi-phase medium voltage contactor
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  • Multi-phase medium voltage contactor

Examples

Experimental program
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Embodiment Construction

[0040] Referring to these figures, a multi-phase medium pressure contact is indicated by the general reference numeral 100 and is illustrated by way of example only as a three-phase contactor.

[0041] Each phase comprises a fixed contact 103 and a corresponding movable contact 104 which can move between the following positions:

[0042] - an open position in which said movable contact 104 is operatively disconnected from said fixed contact 103 ( figure 1 s position);

[0043] - A closed position in which said movable contact 104 is operatively connected to said fixed contact 103 (position not shown).

[0044] The contacts 103 , 104 are positioned inside respective already known vacuum chambers or tubes 102 .

[0045]The multi-phase medium voltage contactor 100 comprises an electromagnetic actuator 10 capable of moving the movable contact 104 and can be positioned between an open position and a closed position, in which the movable contact 104 is also in the In the open pos...

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Abstract

A multi-phase Medium Voltage Contactor (100) comprising: - for each phase, a fixed contact (103) and a movable contact (104) positionable between an open position, in which it is operatively disconnected from the fixed contact (103), and a closed position in which it is operatively connected to the fixed contact (103); - an electromagnetic actuator (10) operatively connected to the movable contact (104) and positionable between a first open position corresponding to the open position of the movable contacts (104), and a second closed position corresponding to the closed position of the movable contacts (104); - a manual opening device (20) operatively connected to the electromagnetic actuator. The manual opening device (20) comprises a kinematic mechanism having: - an operating shaft (8); - first lever means (3) movable by the operating shaft (8); - second lever means (4) movable by the first lever means (3) and operatively coupled to the electromagnetic actuator, - blocking means (5) movable by the first lever means (3) between a first position in which the blocking means (5) lock the second lever means (4) and a second position in which the second lever means (4) are released thereby determining the positioning of the electromagnetic actuator (10) from said closed position into said open position.

Description

technical field [0001] The invention relates to a multiphase medium voltage contactor. Background technique [0002] For the purposes of this application, the term medium voltage refers to devices in the range between 1KV and 50KV. [0003] The use of two different types of switching devices in electrical systems is well known; the first type consists of so-called protective devices, generally circuit breakers, which are basically adapted to carry current for a specific Cut off the current under normal circuit conditions, i.e. short-circuit conditions; the second type consists of manipulating switching devices, such as contactors according to the present invention, which can generate, carry and cut off under normal circuit conditions including overload conditions current. These contactors, which are widely used for example to switch on / off electric motors, need to meet a number of conditions which are important to assume proper functional performance during their life in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H3/22H01H33/66
CPCH01H3/28H01H33/38H01H3/227H01H33/6662H01H3/30
Inventor O·普雷斯蒂尼
Owner ABB (SCHWEIZ) AG
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