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Method for equalizing overall burn up in electromagnetic switching device and corresponding electromagnetic switching device

A technology for electromagnetic switches and switch devices, which is applied to electrical switches, circuits, electrical components, etc.

Inactive Publication Date: 2005-02-02
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when there are mechanical errors, this method cannot guarantee that all contacts will be burned evenly

Method used

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  • Method for equalizing overall burn up in electromagnetic switching device and corresponding electromagnetic switching device
  • Method for equalizing overall burn up in electromagnetic switching device and corresponding electromagnetic switching device
  • Method for equalizing overall burn up in electromagnetic switching device and corresponding electromagnetic switching device

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Experimental program
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Embodiment Construction

[0030] according to figure 1 , The electromagnetic switch device 1 is designed as a contactor 1. It has a contact device 2 including three contacts 3-5. When the switch device 1 is manipulated, the three-phase load 6 can be coupled to or decoupled from the three phase lines L1-L3 of the three-phase power grid through the contacts 3-5. When the contact device 2 is manipulated, that is, the contact 3-5 is opened or closed, each switching process will cause the switch to burn on the contact 3-5.

[0031] In addition to the three phase lines L1, L2, and L3, the three-phase power grid also has a neutral line N. figure 2 Represents the change process of the voltage of the phases L1-L3 with respect to the neutral line N over time t. press figure 2 , The phases L1-L3 have a phase difference of ±120° between each other electrically. The electrical phase difference φ of phase L3 with respect to phase L2, phase L2 with respect to phase L1, and phase L1 with respect to phase L3 is +120°. T...

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Abstract

The invention relates to an electromagnetic switching device (1) comprising a contact device (2) consisting of three contacts (3-5) which decouple and recouple an alternating current load (6) from / to three phases (L1-L3) of an alternating current network. Switch burn up occurs at the contacts (3-5). An overall burn up level (G1-G3) is determined for each contact (3-5) and a control circuit (17) is added. The contact device (2) is actuated by the control switch (17) as a function of overall burn up (G1-G3), whereby the overall burn up (G1-G3) of said contacts (3-5) is averaged out therebetween.

Description

Technical field [0001] The invention relates to a method for equalizing the total burning loss of an electromagnetic switch device with a plurality of contacts, especially a contact device of a contactor, and a corresponding electromagnetic switch device. Background technique [0002] Such methods and corresponding switching devices are known, for example, from DE 4434074 A1 and US-A-5 440180. [0003] Electromagnetically operated switching devices, namely contactors and relays, have a burnout during each switching process, which is referred to as switch burnout in the following. In a multi-pole switch device where the main contact is used to connect a three-phase system, each contact actually has different losses. This leads to failure of the switching device and failure of one of the contacts. As a result, the service life of the switchgear is greatly limited. Because some other contacts may still be fully capable of long-term work. [0004] This phenomenon, called the synchron...

Claims

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Application Information

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IPC IPC(8): H01H1/00H01H9/56H01H11/00
CPCH01H9/563H01H11/0062H01H1/0015
Inventor 诺伯特·埃尔斯纳格尔德·格里彭特罗格莱因哈德·赫布斯特莱因哈德·梅尔诺伯特·米特尔迈耶迪特哈德·朗加尔迪尔克里斯琴·施雷金格伯恩哈德·施特赖赫
Owner SIEMENS AG