(1) On-site measurement of capacitors requires disconnecting the 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.
This instrument features low measurement workload, quick and simple operation, stable performance, accurate measurement, and a high fault detection rate. In addition, its current measurement unit can also be used for measuring electrical equipment such as CVTs and surge arresters, offering multi-functionality.
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. Power supply:
a. Rated voltage: industrial 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 tested capacitor as two arms of the bridge circuit. When measuring the capacitance value of a capacitor, the test switch K is closed, and the test voltage is simultaneously applied to the standard capacitor and the tested capacitor. The processor collects the current signals flowing through both via sensors and processes them to obtain the capacitance value of the tested capacitor.
Due to the use of 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 featuring good stability, repeatability, accuracy, and reliability.
