It focuses on solving the following problems:
(1) On-site measurement of capacitors requires removing connecting wires, which not only involves heavy workload but also easily damages capacitors;
(2) The low output voltage of capacitance meters leads to low fault detection rate.
This instrument features 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 surge arresters, featuring multi-functionality in one instrument.
Features of the Automatic Capacitance Bridge Tester:
Automatic range conversion
Data storage
Large-screen LCD (320×240×LCD) display with Chinese menu operation prompts.
Simultaneous display of waveforms and measurement processing data on the same screen, making the testing process more intuitive;
Equipped with setting, calibration, and debugging functions
Technical Parameters
1. Measurement range and accuracy of the instrument:
a. Capacitance measurement
(1) Capacitance measurement range: 0.1μF to 2,000μF;
(2) Reactive power measurement range: 5 to 20,000 kvar;
(3) Measurement accuracy: ±1.0%;
(4) Resolution: 0 to 1.999μF ±1.0%rdg;
0 to 19.99μF ±1.0%rdg;
0 to 199.9μF ±1.0%rdg;
0 to 1999μF ±1.0%rdg;
b. Current measurement
(1) Current measurement range: 0 to 199.9mA;
0 to 1.999A;
0 to 19.99A;
0 to 199.9A
0 to 1000A;
(2) Measurement accuracy: ±1.0%;
2. Working power supply:
a. Rated voltage: power frequency 220V±10%;
b. Rated frequency: 50Hz;
c. Rated output: 26V/500VA;
3. Normal working conditions of the instrument:
a. Ambient temperature: 0℃ to +40℃
b. Relative humidity: ≤90%
4. Display mode: large-screen LCD with full Chinese output,
TPμp-40 panel-type thermal printer
5. Dimensions/Weight: 320×360×160 mm / 8 kg
6. Working principle
The capacitance bridge adopts a bridge circuit structure, with the standard capacitor and the capacitor under test as two arms of the bridge circuit. When measuring the capacitance value of the capacitor, close the test switch K, and the test voltage is applied to both the standard capacitor and the capacitor under test simultaneously. The processor collects the current signals flowing through both via sensors simultaneously and processes them to obtain the capacitance value of the capacitor under test.
Due to the synchronous sampling technology of the standard capacitor and the capacitor under test, it is not affected by power supply voltage fluctuations; moreover, since the measurement process is fully automatic, errors caused by manual operation are avoided, thus featuring good stability, repeatability, accuracy, and reliability.
