Polarity detection device of current transformer

Abstract

The invention discloses a polarity detection device of a current transformer, which comprises a direct current power supply module, a primary side loading control module, a secondary side synchronous control module and a secondary side detection and monitoring module; the direct current power supply module is used for supplying power to the primary side module and the secondary side module and providing discharge loading voltage for the primary side loading control module; the primary side loading control module is used for wirelessly receiving the control instruction of the secondary side synchronous control module and executing and controlling the pressurization loading of the primary side of the current transformer according to the control instruction; the secondary side synchronous control module is used for wirelessly sending a control instruction to the primary side loading control module and synchronously starting the secondary side detection monitoring module; and the secondary side detection and monitoring module is used for monitoring the electric quantity of the battery and detecting and displaying the secondary side polarity of the detected current transformer, so that the verification of the current mutual inductance polarity function is safely and accurately carried out, and the problem that the current mutual inductance polarity verification is difficult at present is solved.

Description

technical field [0001] The invention relates to the technical field of transformer detection, in particular to a polarity detection device of a current transformer. Background technique [0002] The current transformer is one of the important equipment in the power system. It is widely used in secondary equipment applications such as measurement and control, relay protection, electric energy metering, and fault recording. The two important characteristics of the current transformer are transformation ratio and polarity. Whether it directly affects the accuracy of the power secondary equipment and the safe and reliable operation of the power system, so in the relevant regulations of the power system, the current transformer needs to do a polarity test before and after the handover acceptance, fixed inspection and maintenance, and before putting into operation, and all It is an important test item. [0003] At present, for the rapid detection method and instrument of current ...

AI Technical Summary

Problems solved by technology

[0003] At present, for the rapid detection method and instrument of current transformer polarity, the DC pointer method is generally used to directly connect the 220V AC mains power to the DC system. There is a risk of personal electric shock when connected to the mains power supply; second, the test is unreliable-manually connected to the mains, and the temporary wiring is unreliable; third, the test result is inaccurate-the threshold value of AC jumping is 10V, which is different from the 220V applied With a large deviation, the threshold value cannot be accurately verified

Images