Mutual inductor calibration instrument

Abstract

The embodiment of the invention discloses a mutual inductor calibration instrument which comprises a host machine and an auxiliary machine, wherein the host machine comprises a first wireless communication unit, a data processing unit and a first display unit; and the auxiliary machine comprises a second wireless communication unit and a second display unit. The host machine is used for conditioning, acquiring and converting signals of a mutual inductor, and the auxiliary machine is used for conditioning, acquiring and converting the signals of the mutual inductor and then transmitting the signals to the host machine through wireless communication. A ratio difference and a phase difference after the signals are compared are obtained by data operation processing of the data processing unit of the host machine. The mutual inductor calibration instrument has no need of connecting a secondary test lead, thereby reducing false wiring and lead breakage probability, improving the test safety and reliability, relieving the site workload, and improving the working efficiency and the quality.

Description

technical field [0001] The invention relates to the field of electric power, and more specifically relates to a transformer calibrator. Background technique [0002] Transformer calibrator is a multi-functional and dual-parameter AC measuring instrument, mainly used to test the basic errors of various types and levels of power transformers or instrument transformers and their auxiliary equipment, and can be used for related Electrical metering equipment performs multifunctional performance testing, and the transformer calibrator is one of the indispensable important equipment for the development of the electric power industry. Therefore, vigorously developing transformer calibration devices is of great significance to improving the research and production level of transformers. [0003] At present, for the traditional transformer verification, it is necessary to use secondary test leads to connect the calibrator, the standard transformer and the transformer to be calibrated...

AI Technical Summary

Problems solved by technology

This way of connecting the secondary test wires to the calibrator, the standard transformer and the transformer to be calibrated will lead to the following problems: it is easy to cause improper wiring, which wastes human resources for inspection and affects work efficiency; The test wires are prone to breakage and breakage, which will cause distortion and failure of the transmission signal, threatening the personal safety of the test equipment and personnel; at the same time, if the distance between the standard transformer and the transformer to be calibrated is far, it is necessary to lay a long secondary test wire connection standard The transformer and the transformer to be calibrated, thus introducing additional errors and making the error data inaccurate

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