JDD-50A Fully Automatic Capacitor and Inductance Tester

JDD-50A Fully Automatic Capacitor and Inductance Tester

1、 Product Overview

Reactive power compensation capacitors are important equipment for achieving reactive power balance in power systems. In recent years, reactive power issues have received widespread attention from the power sector, and complete sets of reactive power compensation devices have been widely deployed in distribution networks. The power supply requires real-time balance between active and reactive power in the system. Therefore, reactive power compensation devices should meet the requirements of automatic tracking and real-time compensation, which inevitably requires frequent switching of reactive power compensation capacitor banks. The switching operation of the capacitor bank will generate overcurrent and overvoltage impact, causing damage to the capacitors. To ensure the reliability of the equipment, early detection of capacitor defects and avoid the expansion of faults require regular testing. On site, capacitors are all connected in parallel in groups. The traditional method is to remove the capacitor busbar and use an old-fashioned capacitance meter for measurement. Due to the fact that the capacitor group is composed of dozens to hundreds of small capacitors, the workload of measuring capacitance by disconnecting the wires is very large. Moreover, frequent disconnection can cause screws to slip or not be tightened, leaving safety hazards and easily causing secondary damage to the capacitors. Therefore, it is highly desirable to have a testing instrument that can measure the capacitance of various small capacitors without disconnecting wires, reducing the burden on maintenance personnel, improving the efficiency of maintenance work, and enhancing the safety of distribution network operation.

Based on the actual situation on site, our company has researched and developed this instrument that uses a new experimental method for measurement. This instrument can operate without disconnecting the wires,Adopting advanced measurement principles and four terminal measurement technology,Measure individual capacitors in a group of parallel capacitors,Can accurately measure and test for good repeatability;Compliant with the national standard SJ-255-10300 capacitance measuring instrument.At the same time, it can also measure the inductance of various reactors. The instrument has convenient wiring, simple operation, reduces the workload of maintenance personnel, greatly improves on-site testing efficiency, and provides safety guarantees for the normal operation of the power grid.

2、 Functional Features

l JDD-50A Fully Automatic Capacitor and Inductance TesterThis instrument can measure the individual capacitance of a group of parallel capacitors (both single-phase and three-phase capacitance can be measured) without disconnecting the wires. At the same time, it can also measure the inductance of various reactors, meeting various on-site needs.

l During measurement, this instrument can display not only the measured capacitance or inductance values, but also the measured voltage, current, power, frequency, impedance, phase angle, and other data, in order to better analyze the quality of the test sample;

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

l The instrument is equipped with a large capacity non-volatile memory that can store 200 sets of measurement data.

The instrument is equipped with a USB interface that can store any set of measurement data (limited by USB capacity).

l The instrument is equipped with a high-precision real-time clock function that allows for date and time calibration.

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

l Overcurrent protection function of instrument test power supply: Short circuit of power output will not damage the instrument.

3、 Technical indicators

1. Test voltage: communication 25V±10%，50Hz

communication 1.25V±10%，50Hz 25VA

2. Measurement range and accuracy:

Measurable capacitance range: 0.1uF～6800uF ±（Reading 1%+0.01uF）

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

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

Measurable resistance range: 50mOh!20kΩ±(reading3%+1mΩ)

3. Dimensions: 320 × 260 × 135 (mm)

4. Instrument weight:4.8Kg (excluding test line)