Set for calibrating tester of arrester counter

Abstract

The invention provides a set for calibrating a tester of an arrester counter. The set comprises a standard impact generator, a direct-current boost control circuit, a standard power frequency source, a data collecting module, a comprehensive intelligent processing unit, control buttons, a liquid crystal display and an upper computer waveform analysis module. The data collecting module, the control buttons, the liquid crystal screen and the upper computer waveform analysis module are all connected with the comprehensive intelligent processing unit. The standard impact generator is used for generating impact voltage wave or impact current wave according to preset voltage preset via the control buttons; the standard impact generator is used for generating standard power frequency current; the signal output end of the standard impact generator and the signal output end of the standard power frequency source are connected with the data collecting module. The set has the functions of outputting and measuring impact voltage and current and outputting and measuring power frequency voltage and current, is small in size, light in weight and convenient to carry and allows convenient field testing.

Description

technical field [0001] The invention relates to the technical field of high voltage measurement, in particular to a calibrating device for a counter tester of an arrester. Background technique [0002] Arrester counters are widely used in real-time online monitoring of arresters in substations, and play an important role in monitoring the performance of arresters. The arrester counter plays the role of monitoring the leakage current of the arrester and counting the number of lightning strikes. The counter of the arrester runs for a long time online, which is likely to cause problems such as insensitive counting of the counter and inaccurate measurement of leakage current, which will adversely affect the normal monitoring work of the arrester. Therefore, it is necessary to test the counter with an arrester counter tester. The lightning arrester counter tester can generate standard lightning impulse current wave and power frequency current with a certain amplitude, which can...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the calibration devices for arrester counter testers have single functions and relatively traditional testing methods.

For example, to detect the time parameter and peak value of the shock waveform, the shock voltage divider or the shock shunt plus an oscilloscope is generally used. The shock voltage divider and the shock shunt are large in size and generally weigh 4kg to 6kg, which is inconvenient to carry and requires manual labor. There is also an error in the reading

The measurement of power frequency current generally uses a digital multimeter, but most multimeters are susceptible to external interference when measuring small currents (generally mA level), resulting in inaccurate or large fluctuations in current readings

For some occasions where on-site testing or calibration is required, this traditional method requires multiple measuring devices to complete the calibration and inspection of the counter tester

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