Problem

(1) On-site measurement of capacitors requires removing connecting wires, which is not only heavy workload but also easy to damage capacitors;



(2) The low output voltage of the capacitance meter leads to a low fault detection rate.



(3) Measure the inductance of reactors.



(4) The capacitance and inductance tester has the characteristics of small measurement workload, quick and simple operation, stable performance, accurate measurement, and high fault detection rate.



In addition, its current measurement unit can also be used for measuring electrical equipment such as CVTs and arresters, providing multi-functional use in one instrument.



2 Features

◆ The capacitance and inductance tester has the characteristics of small measurement workload, quick and simple operation, stable performance, accurate measurement, and high fault detection rate.



◆ The capacitance and inductance tester adopts a bridge circuit structure, with the standard capacitor and the tested capacitor as two arms of the bridge circuit. When measuring the capacitance value of the capacitor, the test voltage is applied to both the standard capacitor and the tested capacitor simultaneously. The processor collects the current signals flowing through both via sensors and processes them to obtain the capacitance value of the tested capacitor.



◆ Since the capacitance and inductance tester uses synchronous sampling technology for the standard capacitor and the tested capacitor, it is not affected by power supply voltage fluctuations; moreover, the measurement process is fully automatic, avoiding errors caused by manual operation.



3 Characteristics

1. The HTRG-H fully automatic capacitance and inductance tester adopts advanced measurement principles and four-terminal measurement technology, enabling precise measurement and good test repeatability.



2. Large screen LCD display (320X240 dot matrix) with Chinese menu prompts for operation.



3. The LCD screen comes with touch screen buttons, making operation intuitive and simple.



4. Automatic current segment compensation linearizes the current across the full range, improving the measurement accuracy of the instrument.



5. Waveform and measurement data are displayed simultaneously, making the test process more intuitive.



6. The new generation USB communication function simplifies connection to PC, facilitating the transmission and management of measurement data.



7. This instrument has current overload protection function to prevent damage to the instrument or equipment due to excessive current.



4 Parameters and Principles

Parameters



1. Ambient temperature: -10℃ ～ +40℃.



2. Relative humidity: ≤90%.



3. Working power supply: 220V±10% power frequency.



4. Rated frequency: 50Hz.



5. Rated output: 22V/25A/500VA.



6. Weight: about 8kg.



Working Principle



The fully automatic capacitance and inductance tester adopts a bridge circuit structure, with the standard capacitor and the tested capacitor as two arms of the bridge circuit. When measuring the capacitance value of the capacitor, the test switch K is closed, and the test voltage is applied to both the standard capacitor and the tested capacitor simultaneously. The processor collects the current signals flowing through both via sensors and processes them to obtain the capacitance value and resistive component of the tested capacitor.



Since the fully automatic capacitance and inductance tester uses synchronous sampling technology for the standard capacitor and the tested capacitor, it is not affected by power supply voltage fluctuations; moreover, the measurement process is fully automatic, avoiding errors caused by manual operation, thus it has the characteristics of good stability, good repeatability, and accuracy and reliability. [1]