Three-Phase Capacitance and Inductance Tester


The three-phase capacitance and inductance tester is specially developed to address the problems existing in measuring the capacitance of individual capacitors in shunt capacitor banks at substations on site. It focuses on solving the following problems:

(1) On-site measurement of individual capacitors requires removing connecting wires, which is not only labor-intensive but also prone to damaging the capacitors.

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

(3) Measuring the inductance of reactors

(4) Quickly measuring the capacitance of individual capacitors in three-phase delta and wye connected capacitor banks.

Technical Parameters


1. Capacitance range: 0.2μF to 2,000μF;

Capacity range: 5 to 20,000 kvar;

Measurement accuracy: 0.2μF to 2μF (internal CT) ±1% reading ±0.02μF;

0.2μF to 2μF (clamp meter) ±1.5% reading ±0.05μF;

2μF to 2,000μF ±1% reading ±2 digits;

2. Inductance range: 1mH to 9.99H; Measurement accuracy: ±1.5% reading ±2 digits

3. Output measurement voltage: AC 26V/500VA; 50Hz;

4. Display: LCD screen, full Chinese output, panel-mounted thermal printer

5. Dimensions/Weight: 370×370×220 mm / 16kg

6. Operating conditions:

a. Ambient temperature: 0℃ to +40℃, relative humidity: ≤90%

b. Power supply: AC 220V±10%; 50Hz;

In the capacitor branch under test, there is a sampling circuit that samples the voltage and current of the capacitor under test. The output terminals of the sampling circuit are respectively connected to amplification circuits. The voltage signal output from the voltage amplification circuit and the current signal output from the current amplification circuit pass through a phase detector to output a phase difference signal. After the voltage signal and current signal pass through an A/D converter, they are input to the CPU for calculation to obtain the measured capacitance value. The movable current sampling unit allows direct measurement of capacitance without removing connecting wires. In addition, the gear during measurement is automatically selected, avoiding errors caused by manual operation, with good stability, good repeatability, accuracy and reliability



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