Contactor synchronous detector and use method thereof

A technology of synchronous detection and contactor, applied in the direction of circuit breaker testing, etc., can solve problems such as equipment accidents, main contact welding, three-phase main contact closure asynchronous, etc., to achieve the effect of solving equipment damage and facilitating adjustment

Inactive Publication Date: 2015-12-23
XINAN COAL IND ZAOZHUANG COAL MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three-phase main contacts of the contactor are not synchronized when they are closed, and a certain two-phase main contacts are impacted by a large starting current, which can cause the main contacts

Method used

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  • Contactor synchronous detector and use method thereof
  • Contactor synchronous detector and use method thereof

Examples

Experimental program
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Embodiment

[0020] The contactor synchronous detector includes a display unit and a test unit, and the display unit is connected with the test unit. The test unit includes a programmable controller and a test circuit. One of the three moving contacts and three static contacts of the contactor KM is connected to the input common terminal L+ of the programmable controller, and the other contact is respectively connected to the programmable controller. The input terminals I0.1, I0.2 and I0.3 of the programming controller are connected.

[0021] The intermediate relay MY2NJ is connected between the output terminal Q0.0 and the N terminal, and the contactor KM and the normally open contact of the intermediate relay MY2NJ are connected in series to the AC power supply. The display unit includes a text display, and the text display is connected with the programmable controller through a communication data line.

[0022] The programmable controller adopts Siemens S7-200 CPU224, the text display ...

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PUM

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Abstract

The invention discloses a test instrument for testing the adhesion time of a three-phase contact of a vacuum circuit breaker. The test instrument comprises a display unit and a test unit which are connected. The test unit comprises a programmable logic controller (PLC) and a test circuit. One of the movable contact and the fixed contact of a contactor KM is connected with the input common end of the PLC and the other one is connected with another input end of the PLC. An intermediate relay MY2NJ is connected between an output end and an N end. The contactor KM is connected in series with a normally-open contact MY2NJ and then connected to an AC power supply. The display unit comprises a text display connected with the PLC via a data line. By means of the control of the PLC to an external relay and time detection of the contact of the vacuum circuit breaker returned to a S7-200 module, the test instrument achieves a debugging precision requirement of a vacuum contactor and displays a result on a TD200 text display in order that a professional may easily overhaul and debug .

Description

technical field [0001] The invention belongs to the field of electric power system and automation technology, relates to mine electrical technology, and in particular to an instrument for detecting and debugging the synchronous pull-in time of three-phase contacts of electrical equipment such as vacuum circuit breakers. Background technique [0002] It has been used to observe whether the contactor is connected to an external light bulb, but the existing technology cannot detect the specific closing time of each contact. [0003] Since the electronic control system of modern electrical equipment generally adopts all-digital frequency modulation and speed regulation, higher precision requirements are put forward for the three-phase pull-in synchronization time of the vacuum reversing contactor, and the accuracy is required to be 10ms. The three-phase main contacts of the contactor are not synchronized when they are closed, and a two-phase main contact is impacted by a large s...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 赵伟杨泽闵涛熊大为邵长存高方浦马秋聪
Owner XINAN COAL IND ZAOZHUANG COAL MINING GROUP
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