Multifunctional mutual-inductor tester

Abstract

The invention relates to a multifunctional mutual inductor checking instrument, belonging to the electronic power unit technical field. The checking instrument comprises a signal conditioning box and an upper machine, wherein, the signal conditioning box comprises two precision voltage mutual inductors, two precision current mutual inductors, a signal acquisition unit, a control unit, a power supply module, a prior voltage mutual inductor connector, a standard voltage mutual inductor connector, a prior current mutual inductor connector, a standard current mutual inductor connector, an electronic voltage mutual inductor analog quantity connector, an electronic current mutual inductor analog quantity connector and two electronic voltage or current mutual inductor digital quantity connectors. The multifunctional mutual inductor checking machine can check the prior mutual inductor, the electronic mutual inductor with an analog quantity output and the electronic mutual inductor with a digital quantity output and can satisfy the checking requirements of the prior mutual inductor.

Description

technical field [0001] The invention belongs to the technical field of electric power equipment, and in particular relates to the technical performance verification of traditional transformers and electronic transformers in field application and laboratory application. 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 multi-functional performance testing, so the transformer calibrator is one of the indispensable and important supporting equipment for the development of the electric power industry. [0003] The early transformer calibrator was mainly designed on the principle of direct comparison, that is, the secondary voltage or current of the standard transformer and the transformer to be tested w...

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Problems solved by technology

[0004] The IEC60044-7 / 8 standard stipulates that electronic transformers (ECT / EVT) need to have a digital output, and traditional transformer calibrators cannot perform performance tests on electronic transformers due to the lack of relevant digital interfaces.

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