Automated calibrating device for mutual inductors

Abstract

The invention discloses an automated calibrating device for mutual inductors, which relates to a calibrating device for mutual inductors. At present, a calibrating system for mutual inductors is implemented by adopting a manual line connection and automatic measurement mode, because the testing items for mutual inductors are numerous, multiple sets of different equipment are required to carry out calibration on the testing items, and when the calibrations are performed, line connection and disconnection operations need a large amount of time, and the efficiency is low. The automated calibrating device disclosed by the invention is characterized by comprising a rack body, a transmission line, a preventive test device, an error calibrating device and a control device, wherein the transmission line is arranged in the middle of the rack body; the preventive test device and the error calibrating device are sequentially arranged on the rack body beside the transmission line along the forward motion direction of the transmission line, the preventive test device is used for insulation resistance, power frequency withstand voltage and secondary turn-to-turn insulation tests, the error calibrating device is used for error and magnetic saturation tests, and the control device is used for controlling the preventive test device and the error calibrating device to act. The preventive test device and the error calibrating device can carry out automatic line connection on mutual inductors, and can simultaneously calibrate different items of two batches of mutual inductors, thereby shortening the calibration time and improving the calibration efficiency.

Description

technical field [0001] The invention relates to a transformer testing device. Background technique [0002] The current transformer used in the power grid is to reduce the large current in the primary line to the small current required by the secondary measurement circuit, and mainly realize the functions of electrical isolation and proportional measurement at both ends of the high and low voltage. The current transformer for metering is one of the main measuring instruments used in the settlement of electric energy trade, and it belongs to the national compulsory verification specification. Each metering current transformer needs to pass the initial verification and periodic verification before it can be used normally. With the rapid development of the economy, the number of current transformers used for measurement has also increased sharply. The traditional manual verification method can no longer meet the rapidly growing demand for transformer verification. It is impera...

AI Technical Summary

Problems solved by technology

Due to the large number of transformer testing items, multiple sets of different equipment are required for verification. It takes a lot of time to manually connect and disconnect the wires during these verifications, which has become the main bottleneck for improving the efficiency of transformer verification.

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