Reactive power compensation capacitor is an important equipment to satisfy the reactive power balance of the power system. In recent years, the problem of reactive power has received general attention from the electrical industry, and a large number of reactive power compensation devices have been put into operation in the distribution network. The power supply requires the real-time balance of active and reactive power in the system. Therefore, the reactive power compensation device should meet the requirements of automatic tracking and real-time compensation, which inevitably requires frequent switching and switching of the reactive power compensation capacitor bank. The switching operation of the capacitor bank will produce overcurrent and overvoltage shocks, which will cause damage to the capacitor. In order to ensure the reliability of the equipment, early detection of capacitor defects and avoid the expansion of faults, regular inspections are required. In the field, capacitors are all connected in groups in parallel. The traditional method is to remove the capacitor bus and then use the old-fashioned capacitance meter to measure. Since the capacitor bank is composed of dozens to hundreds of small capacitors, it is necessary to disconnect the wires to measure the capacitance. The amount is large, and frequent removal of the wires will cause the screws to slip or not be tightened, leaving a safety hazard, and it is also easy to cause secondary damage to the capacitor. Therefore, it is highly desirable to have a test instrument that can measure the capacitance of each small capacitor without removing the wires, reduce the burden of maintenance personnel, improve the efficiency of maintenance work, and improve the safety of the operation of the distribution network.

In view of the actual situation on the spot, our company has developed this kind of instrument that uses the new test method to carry out the measurement after tackling key problems. The instrument can measure the single capacitor of a group of parallel capacitors without disconnecting the wires, using the front-end measurement principle and four-terminal measurement technology, which can accurately measure and have good test repeatability; in line with SJ-255-10300 capacitance measuring instrument National standard. At the same time, it can also measure the inductance of various reactors. The instrument has convenient wiring and simple operation, which reduces the workload of maintenance personnel, greatly improves the efficiency of on-site testing, and provides a safety guarantee for the normal operation of the power grid.

This instrument can measure the single capacitance of a group of parallel capacitors without disconnecting the wires (both single-phase capacitance and three-phase capacitance can be measured). At the same time, this instrument can also measure the inductance of various reactors, which can meet various applications on site. .

During the measurement, the instrument displays the measured capacitance value or inductance value and can also display the measured voltage, current, power, frequency, impedance, phase angle and other data, so as to better analyze the quality of the test product;

The instrument uses an 8.0-inch 800×600 graphic dot matrix K600+ core 65K DGUS screen, touch operation, clear observation during day and night, Chinese menu prompts, and easy operation.

The instrument has a built-in large-capacity non-volatile memory: 200 sets of measurement data can be stored.

The instrument is equipped with a U disk interface, which can store any group of measurement data (limited by the capacity of the U disk).

The instrument has a built-in high-precision real-time clock function: date and time can be calibrated.

The instrument comes with a high-speed micro thermal printer: it can print measurement and historical data.

The instrument tests the power supply overcurrent protection function: the short circuit of the power output will not damage the instrument.

1. Test voltage: AC 25V±10%, 50Hz

AC 1.25V±10%, 50Hz 25VA

2. Measuring range and accuracy:

Measureable capacitance range: 0.1uF～6800uF ±(reading 1%+0.01uF)

Measured inductance range: 50uH～20H ±(reading 3%+0.01mH)

Measureable current range: 5mA～20A±(reading 3%+0.1mA)

Measureable resistance range: 50mΩ～20kΩ±(reading 3%+1mΩ)

3. Dimensions: 405mm×330mm×180mm

4. Instrument weight: 8.5Kg (not including test wire)

5. Conditions of use

Ambient temperature: -20℃～40℃

Environmental humidity: ≤85%RH

Working power supply: AC220V±10%, 50±1Hz