A capacitor sampling circuit has a sampling circuit for sampling the voltage and current of the measured capacitance. The output terminals of the sampling circuit are respectively connected to the amplification circuit, and the voltage signal output from the voltage amplification circuit and the current signal output from the current amplification circuit pass the phase detection. After the device outputs the phase difference signal, and the voltage signal and the current signal pass through the A/D converter, the input CPU calculates to obtain the measured capacitance value. Because of the use of a moving current sampling unit, it is possible to directly measure the capacitance without removing the connection line. In addition, the measurement process position is automatically selected to avoid the error caused by manual operation, so it has the characteristics of good stability, good repeatability, and accuracy and reliability.
The automatic capacitance inductance tester is specially developed for measuring the capacitance value of a single capacitor in a shunt capacitor bank at the substation site under the guidance of an expert working group of a reactive power compensation device. It focuses on solving the following problems:
(1) The measurement of a single capacitor at the site requires the removal of the connection line, which not only has a large workload but also easily damages the capacitor.
(2) The output voltage of the capacitance meter is low and the fault detection rate is low.
(3) Measure the inductance of the reactor.
The instrument has the characteristics of small measurement workload, quick and simple, stable performance, accurate measurement, and high failure detection rate. In addition, its current measurement unit can also be used for measurement of electrical equipment such as CVTs and surge arresters.
This model tester features
(1) Automatic range conversion;
(2) Store 2000 test data;
(3) Large-screen LCD ( 320 × 240 LCD ) display, Chinese menu menu operation tips;
(4) Achieve the same screen display of waveform and measurement processing data, making the test process more intuitive;
(5) With setting, correction and debugging functions.
Wuhan Huadian Hi-tech Co., Ltd. specializes in the production, sales, research and development of solutions for high and low voltage transmission and transformation tests, series resonant pressure resistance, insulation withstand voltage test, transformer testing, and circuit breaker testing. For the nearly 100 power engineering companies, the power installation company's test, installation, and test have provided high-quality test equipment and technical solutions, which have been well received by users. Twenty years of accumulated industry experience will provide reliable help for more users. Wuhan Huadian High-tech Co., Ltd. is willing to work together with you for a win-win situation and grow together!
Introduction
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Flow chart
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