Automatic Capacitance and Inductance Tester Factory Direct
Darui Electric recommends for you
The automatic capacitance and inductance tester, referred to as capacitance and inductance tester, adopts a bridge circuit structure, where the standard capacitor and the tested capacitor serve as the two arms of the bridge circuit. When measuring the capacitance value of a capacitor, close the test switch K, and the test voltage is applied simultaneously 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 and resistive component of the tested capacitor.
Functions
"Technical Measures for Preventing Capacitor Device Accidents" stipulates that for high-voltage shunt capacitor sections, the capacitance of individual capacitors in the capacitor bank should be measured periodically. It is recommended to use a measurement method that does not disconnect the connecting wires to avoid faults such as oil leakage from the bushing caused by stress during disassembly and assembly of connecting wires.
It is specially developed to address the problems existing in measuring the capacitance value of individual capacitors in shunt capacitor banks and SCV devices at substation sites. It has the following functions:
* Measure the capacitance of individual capacitors or the entire bank of shunt and integrated capacitors without disconnecting wires.
* Measure the inductance of reactors and line traps without disconnecting wires.
* Measure the entrance capacitance of transformers and generators without disconnecting wires.
* Has the function of measuring parallel (discharge) resistance values.
* Can compensate for the problem of low fault detection rate caused by low output voltage of capacitance meters.
* Synchronously displays voltage and current waveforms and phase, and calculates the power loss of the tested capacitor.
Working Principle
The automatic capacitance and inductance tester adopts synchronous sampling technology for the standard capacitor and the tested capacitor, which is not affected by power supply voltage fluctuations; in addition, the measurement process is fully automatic, avoiding errors caused by manual operation, so it has the characteristics of good stability, good repeatability, accuracy and reliability.
Technical Parameters
1. Capacitance range: 0.2μF～2,000μF;
Capacity range: 5～20,000 kvar;
Measurement accuracy: ±1.5%×reading±2 digits;
Resolution: ±1.0%rdg;
2. Inductance range: 1mH～9.99H; Measurement accuracy: ±1.5%±2 digits
3. Output measurement voltage: AC 26V/500VA; 50Hz;
4. Display mode: large-screen LCD full Chinese output, TPμp-40 panel-type thermal printer
5. Dimensions and weight: 370×370×220 mm/ 8 kg
6. Working conditions:
Ambient temperature: 0℃ ～+40℃, relative humidity: ≤90%
Power supply: AC 220V±10%; 50Hz;
Measurement range, resolution and error values
Capacitance measurement range: |
Error value: |
0.020μF ～ 0.200μF |
±0.5% |
0.200μF ～ 2.000μF |
±0.5% |
2.000μF ～ 20.00μF |
±0.5% |
20.00μF ～ 200.0μF |
±0.5% |
200.0μF ～ 2000.μF |
±0.5% |
Capacitor reactive power |
0 ～ 20.00Mvar |
Error value |
±1% |
Capacitor active power |
0 ～ 20.00kW |
Error value |
±1% |
Capacitor dissipation factor |
0 ～ 20.00% |
Error value |
±1% |
Capacitor resistance component |
0 ～ 10.00MΩ |
Error value |
±1% |
Inductance measurement range |
Error value |
0.10mH ～ 0.200H |
±0.5% |
2.000H ～ 20.00H |
±0.5% |
20.00H ～ 200.0H |
±0.5% |
200.0H ～ 2000.H |
±0.5% |
Inductor reactive power |
0 ～ 20.00Mvar |
Error value |
±1% |
Inductor active power |
0 ～ 20.00kW |
Error value |
±1% |
Inductor dissipation factor |
0 ～ 20.00% |
Error value |
±1% |
Inductor resistance component |
0 ～ 10.00MΩ |
Error value |
±1% |
Clamp sensor measurement range and error (component)
Current measurement range (AC) |
Error value |
0.000mA ～ 50.00A |
±0.2% |
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Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
