In-situ mutual inductor checking device

The utility model relates to a mutual inductor site check device, which is composed of a square frame with a wheel, a standard mutual inductor square box body, a square check meter box body, a square load box body and a square voltage regulating power source box body. The mutual inductor site check device can exactly and quickly check a current mutual inductor from 75 A to 600A of primary current of the exact stage of 0.2 stage or under 0.2 stage on site. The utility model has the advantages of small volume and convenient transportation, and is compact integration with the functions of a mutual inductor, a check meter, a load box and a voltage regulator. The mutual inductor site check device reduces the workload of primary and secondary wiring of the standard current mutual inductor, and the transformation ratio of the standard mutual inductor can be switched by a switch simultaneously. The voltage regulator has two kinds of regulating mode of coarse regulation and fine regulation, and voltage regulation speed and regulation fineness can be organically bonded. The mutual inductor site check device can protect circuits for complete operation, and people can be at ease. The mutual inductor site check device has load extended function, and can enhance the check speed on site. The utility model does not need to be disassembled the integration for check, and can realize single component check by simple disassembly.