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System for automatically testing parameters of under-voltage trip unit and operation method for system

An automatic test system and undervoltage release technology, which is applied in circuit breaker testing and other directions, can solve the problems that it is difficult to adapt to the accuracy requirements of undervoltage releases and cannot detect the tripping force of undervoltage releases, and achieve Increase the variety, improve the detection speed, and the comprehensive effect of detection parameters

Inactive Publication Date: 2012-07-11
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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  • System for automatically testing parameters of under-voltage trip unit and operation method for system
  • System for automatically testing parameters of under-voltage trip unit and operation method for system

Examples

Experimental program
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Embodiment 1

[0020] Such as figure 1 , the undervoltage release parameter automatic test system 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; the tripping force testing part of the force measuring device 4 is set opposite to the armature 2-1 of the release 2 to be tested. Among them, the programmable power supply can use the APS8000L linear programmable A...

Embodiment 2

[0025] The test method of the undervoltage release parameter automatic test system in the described embodiment 2 includes:

[0026] Step 1. Control the output voltage of the programmable power supply 1 from 30%* through the computer 5 U step to 90%* U, record the time point of this step as the first initial time point t1', and start timing; if the computer 5 detects that the armature 2-1 is engaged by the detection device 3, record the time point when the armature 2-1 is engaged is the first response time point t2', and the tripping response time Tr'=t2'-t1' is obtained; If it is within the standard response time range of the undervoltage release 2, it is judged that the undervoltage release 2 is unqualified;

[0027] Step 2, control the output voltage of the programmable power supply 1 from 80%* to 80% by the computer 5 U step down to 30%* U, record the time point of the downward step as the second initial time point t3', and start timing; if the detection device 3 de...

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Abstract

The invention relates to a system for automatically testing parameters of an under-voltage trip unit. The system comprises a programmable power supply, a force detection device and a computer, wherein the computer is connected with the programmable power supply and is used for transmitting 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 of an under-voltage trip unit to be detected; a detection signal output end of the force detection device which is used for detecting trip force of the under-voltage trip unit to be detected is connected with the computer; a trip force testing part of the force detection device is arranged opposite to an armature of the trip unit to be detected; and a detection device for detecting the suction state or the release state of the armature of the under-voltage trip unit to be detected is arranged at the armature of the under-voltage trip unit to be detected. By the system, the released trip force can be detected while the power acquisition or power loss response time and the suction or release trip voltage of the under-voltage trip unit are detected; and by the device, all the parameters of the under-voltage trip unit can be automatically measured without manual interference, so that the testing parameters can be detected on a large scale in batches.

Description

technical field [0001] The invention relates to an automatic test system and a test method for parameters of an undervoltage release. 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 e...

Claims

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Application Information

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