System for testing service life of electromagnetic relay coil and service life evaluation method

A technology of electromagnetic relay and life test, which is applied in circuit breaker testing, instrumentation, measuring electricity, etc., and can solve problems such as research and life test of relay coils that have not yet been seen.

Active Publication Date: 2012-10-03
SUZHOU NUCLEAR POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many methods or equipment for testing electromagnetic relays, such as the relay comprehensive test system (which can measure various electrical p

Method used

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  • System for testing service life of electromagnetic relay coil and service life evaluation method
  • System for testing service life of electromagnetic relay coil and service life evaluation method
  • System for testing service life of electromagnetic relay coil and service life evaluation method

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] see figure 1 , an electromagnetic relay coil life test system, comprising a regulated power supply 1, a timing switch 8, an alternating aging box 9, a thermocouple temperature sensor 4, a resistance measuring instrument 3, an insulation resistance tester 10, a data acquisition device 6, a voltage stabilizing The power supply 1 is connected in series with the relay 2 and the timing switch 8, and the regulated power supply 1 supplies power to the relay 2. Here, the relay 2 is a relay group, including multiple relays connected in parallel, and the timing switch 8 can cut off the regulated power supply 1 at the set time. Power is supplied so that relay 2 is in a power-off state. exist figure 1 Among them, the relay 2 is in the alternating aging box 9, and the alternating aging box 9 can control the test temperature in the box according to the time, so that when th...

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PUM

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Abstract

The invention discloses a system for testing the service life of an electromagnetic relay coil and a service life evaluation method. By matched control of a voltage-stabilizing power supply, a timing switch and an alternation aging box, a plurality of groups of relays are respectively subjected to accelerated aging test and measured by a thermocouple temperature sensor, a resistance measurer and an insulating resistance measurer to obtain coil aging sensitivity parameters such as coil enameled wire average temperature, coil direct current resistance and coil insulating resistance, the average operating time of a plurality of groups of test is calculated by using a reliability theory, and the activation energy of a coil enameled wire is calculated by using a least square method, so parameters in a service life evaluation model are determined, and the average operating time (service life) of the relay coil can be evaluated by using the service life evaluation model with the determined parameters.

Description

technical field [0001] The invention relates to an electromagnetic relay coil life test system, and also relates to an electromagnetic relay coil life evaluation method. Background technique [0002] Electromagnetic relay is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. It is generally composed of an iron core, a coil, an armature, and a contact reed. and so on. Electromagnetic relays will have aging degradation during use, which is mainly divided into aging of contacts and aging of coils. The aging of the contact is mainly due to the formation of various surface films on the contact surface during long-term use, which affects the contact performance, and the carbonized area deposited on the contact surface has the most prominent impact on it. The aging of the coil is due to the fact that the rel...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/327
Inventor 石颉姚建林施海宁
Owner SUZHOU NUCLEAR POWER RES INST
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