Portable multi-contact relay checking instrument and checking method thereof

Abstract

The invention discloses a portable multi-contact relay checking instrument and a checking method thereof. The checking instrument is composed of a controller, a DC-DC voltage regulation module, a contact test module, a signal synchronization module, a test function switching switch and a man-machine interaction module. The man-machine interaction module is connected with the controller. The DC-DC voltage regulation module is connected with the controller and is controlled by the controller to adjust a voltage needed for output; the DC-DC voltage regulation module is provided with a positive output terminal and a negative output terminal that are used for connecting two ends of a relay coil. The contact test module has at least one pair of interfaces for connecting auxiliary contacts of the relay. The DC-DC voltage regulation module and the contact test module are connected to the controller through connection with the signal synchronization module. The signal synchronization module is used for realizing synchronous collection of the deflection voltage and time of the auxiliary contact of the contactor. The test function switching switch is connected with the controller and is used for sending a switching signal to the controller, thereby starting a corresponding testing function procedure of the controller. The portable multi-contact relay checking instrument has advantages of high portability, improved checking efficiency, and complete functions.

Description

technical field [0001] The invention relates to a portable multi-contact relay calibrator and a calibrating method thereof, in particular to a group calibrating method for realizing the operating voltage and operating time of multiple pairs of auxiliary contacts of the relay. Background technique [0002] In the secondary circuit of the power system, various relays have been widely used, such as various voltage-type intermediate relays, time relays, etc. Through the combination of these relays and secondary lines, the complex secondary system is realized. control and monitoring functions. [0003] Since relays are widely used in the secondary system, the performance and operation status of relays are directly related to the normality of the power secondary system, and even to the safety and stability of the power system. Therefore, for the power system, the annual inspection At this time, the test and calibration of the relay is particularly critical and necessary. [0004...

AI Technical Summary

Problems solved by technology

[0005] 1. The instrument is very heavy and not easy to carry and move;

[0006] 2. The relay protection tester needs to be connected to the AC power supply to start the relevant test. The distribution of the relays in the actual substation is scattered, causing trouble for the testers to take power;

[0007] 3. The existing relay protection tester cannot realize the simultaneous test of multiple pairs of contacts and the function of group return and storage during relay calibration, which seriously affects the efficiency of the test and even affects the power transmission time;

[0008] 4. The existing relay protection tester does not have any special interface for various contact test. When testing the relay, many people are required to operate to complete the calibration work.

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