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Testing device for undervoltage tripper

An undervoltage release and force measuring device technology, which is applied to circuit breaker testing and other directions, can solve problems such as difficulty in adapting to the accuracy requirements of the undervoltage release, inability to detect the tripping force of the undervoltage release, etc. The effect of increasing types, improving detection speed, and comprehensive detection parameters

Inactive Publication Date: 2014-05-28
CHANGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing design, the undervoltage release is usually activated by manually switching the voltage, so that it is impossible to accurately measure the action time and recovery time of the undervoltage release, and it is impossible to detect the undervoltage release The tripping force of the undervoltage release can only be judged by intuitively judging whether the action of the undervoltage release matches the applied voltage to judge whether the undervoltage release meets the requirements; Accuracy requirements for detection of performance parameters of releases

Method used

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  • Testing device for undervoltage tripper

Examples

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Effect test

Embodiment 1

[0020] Such as figure 1 , the undervoltage release test device of this embodiment includes: the maximum output voltage is not less than the rated operating voltage U of the undervoltage release Double programmable power supply 1, force measuring device 4, and computer 5; the computer 5 is connected to the programmable power supply 1 for sending the control signal of the programmable power supply 1 and receiving the output voltage signal of the programmable power supply 1; The programmable power supply 1 is connected to the coil of an undervoltage release 2 to be tested; the detection signal output terminal of the force measuring device 4 for detecting the tripping force of the undervoltage release 2 to be tested is connected to the computer 5 connected; the tripping force testing part of the force measuring device 4 is set opposite to the armature of the release 2 to be tested. Among them, the programmable power supply can use the APS8000L linear programmable AC power supply...

Embodiment 2

[0023] The parameter testing method of the undervoltage release in the described embodiment 1 includes:

[0024] Step a, the armature of the undervoltage release 2 to be tested is released and pressed against the testing part of the force measuring device, so that the force measuring device 4 obtains an initial data, and transmits the initial data to the computer 5;

[0025] Step b, control the output voltage of the programmable power supply 1 from 30%* to 30% by the computer 5 U step to 90%* U, record the time point of this step as the first initial time point t1, and start counting; if the initial data becomes smaller or disappears, immediately record this time point through the computer 5, which is the first response time point t2, then The tripping response time Tr=t2-t1 is obtained; if the initial data has no change or the tripping response time Tr is not within the standard response time range of the undervoltage release 2 to be tested, the undervoltage tripping is ju...

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Abstract

The invention relates to a testing device for an undervoltage tripper, which comprises a programmable power supply with maximal output voltage being no less than square root of 2 times of rated working voltage U of the undervoltage tripper, a force measuring device and a computer; the computer is connected with the programmable power supply, and used for sending out a control signal of the programmable power supply and receiving a voltage signal of the programmable power supply; the programmable power supply is connected with a coil for an undervoltage tripper to be tested; the detection signal output terminal of the force measuring device used for detecting the tripping force of the undervoltage tripper to be tested is connected with the computer; a tripping force measuring part of the force measuring device is arranged oppositely to an armature for the undervoltage tripper to be tested. The force of releasing tripping can be detected during the process of detecting the power-on or power-off response time and the pull-in or release drop-away voltage of the undervoltage tripper, and the testing device can automatically finish measuring all parameters of the undervoltage tripper without manual intervention, therefore, the large-scale mass detection can be carried out.

Description

technical field [0001] The invention relates to an undervoltage release testing device and a testing method thereof. Background technique [0002] In the actual manufacturing process and use of the undervoltage release, it is necessary to detect its pull-in voltage value and undervoltage trip voltage value; in order to ensure the reliable opening of the circuit breaker, it is necessary to detect the tripping force during the undervoltage trip action , and parameters such as the delay time value of the undervoltage release with delay function. If the above parameters are accurately measured, it is also necessary to detect the power-on pickup response time of the undervoltage release and the lag time of the undervoltage release without delay. Therefore, for the production of circuit breakers with undervoltage releases, testing the performance parameters of undervoltage releases is an important link to ensure the quality of circuit breakers. [0003] In the existing design, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
Inventor 周祥才吴志祥
Owner CHANGZHOU INST OF TECH
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