Instrument for testing transformation ratio and polarity of capacitance type voltage transformer

Abstract

The invention provides an instrument for testing the transformation ratio and polarity of a capacitance type voltage transformer. The instrument comprises a high voltage output module and a voltage signal collection and calculation module; the high voltage output module comprises a primary step-up transformer and a high voltage output divider resistance unit in parallel connection, the high voltage output divider resistance unit comprises a large power high voltage resistor and three high precision wiring resistors, one end of the large power high voltage resistor is connected to the capacitance type voltage transformer, and the other end of the large power high voltage resistor is connected to the high precision wiring resistors in series; and the three high precision wiring resistors areconnected in parallel, one end of each high precision wiring resistor is grounded, and the other end of the high precision wiring resistor is connected in series with the large power high voltage resistor, and a high voltage dividing output end is led out. The instrument is researched to fill the blank of instrument specially used for transformation ratio and polarity test of the capacitance typevoltage transformer, and has the advantages of simple work, being safe and practical, high in working efficiency and anti-noise performance and low in cost.

Description

Technical field: [0001] The invention relates to the field of electric power testing, in particular to a capacitive voltage transformer transformation ratio and polarity testing instrument. Background technique: [0002] In recent years, with the continuous reform and development of my country's electric power industry and power grid technology, in order to ensure the fairness, justice and accuracy of electric energy measurement, my country's measurement law stipulates that on-site verification of transformers must be carried out regularly, so that capacitor voltage transformers can be used at the gate The role of metrology is growing. At present, the integration level of on-site calibration equipment for capacitive voltage transformers is not high. When the relative positions of the complete sets of equipment are not the same, the uncertainty of the distribution parameters is increased, resulting in the additional error introduced by the measurement system is very unstable,...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the transformation ratio of the capacitive voltage transformer, the high risk of the polarity test process, the cumbersome process and the low efficiency in the prior art, the present invention provides an efficient and safe dedicated capacitive voltage transformer transformation ratio, Apparatus for Polarity Test

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