Yangzhou anti-interference high-voltage dielectric loss tester

Yangzhou Xuming Electrical Technology Co., Ltd. is located in Liubao Town, Yangzhou City, Jiangsu Province, which is an advanced town for the development of electrical industry in Jiangsu Province. The company's main products include: AC/DC test transformers, variable frequency series resonant devices, high-voltage switch mechanical characteristic testers, DC resistance testers, transformer capacity parameter testers, high current generators, circuit resistance testers, high-voltage wireless phase analyzers, DC high-voltage generators, polyimide films, mica plates, 3240 epoxy plates, safety sliding contact wires, rigid sliding contact wires, asbestos rubber tubes, environmentally friendly dust removal bags, and other related products. The company specializes in the production and processing of these products and their supporting products, and has a complete and scientific quality management system. Yangzhou Xuming Electrical Technology Co., Ltd. has been recognized by the industry for its integrity, strength, and product quality. Welcome friends from all walks of life to visit, guide and negotiate business.

（CVT）YangzhouAnti interference high-voltage dielectric loss testerWorking Principle:

After starting the measurement, the high voltage set value is sent to the variable frequency power supply. The variable frequency power supply uses PID algorithm to adjust the output speed to the set value. The measurement circuit sends the measured high voltage to the variable frequency power supply and fine tunes the low voltage to achieve accurate high voltage output. According to the positive/negative wiring and the setting of internal/external standard capacitors, the measurement circuit automatically selects the input and switches the range based on the test current. The measurement circuit uses Fourier transform to filter out interference, separates the fundamental wave of the signal, and performs vector operation on the standard current and the test sample current. The amplitude calculates the capacitance, and the angle difference calculates the tg δ. Repeat multiple measurements and select an intermediate result through sorting. The measurement is completed, and the measurement circuit issues a voltage reduction command. The variable frequency power supply slows down the voltage to 0.

CVT measurement: The CVT isolation switch is disconnected, and the low-voltage isolation switch is connected to output low voltage. When measuring C2, the CVT reversing switch is turned on, C2 is connected to the test channel, and C1 is used as the standard capacitance to measure C2.

high-precision measurement

By using techniques such as frequency fluctuation, digital waveform analysis, and bridge self calibration, combined with high-precision three terminal standard capacitors, high-precision dielectric loss measurement can be achieved, and the accuracy and stability of positive/negative wiring measurement can be improved.

（CVT）YangzhouAnti interference high-voltage dielectric loss testerFeatures

Accuracy: CX: ± (reading x 1%+1pF)

TG δ: ± (reading x 1%+0.00040)

Anti interference index: Frequency conversion anti-interference, can still achieve the above accuracy under 200% interference

Capacity range: Internal high voltage: 3pF~60000pF/10kV 60pF~1 μ F/0.5kV

External high voltage: 3pF~1.5 μ F/10kV, 60pF~30 μ F/0.5kV

Resolution: 0.001pF, 4 significant digits

Range of TG δ: unlimited, resolution 0.001%, automatic identification of three types of samples: capacitance, inductance, and resistance.

Test current range: 10 μ A~5A

Internal high voltage: Set voltage range: 0.5-10kV

High output current: 200mA

Pressure rise and fall method: continuous smooth adjustment

Voltage accuracy: ± (1.5% x reading+10V)

Voltage resolution: 1V

Test frequency: 45, 50, 55, 60, 65Hz single frequency

Features

1. Variable frequency anti-interference

Adopting frequency conversion anti-interference technology, it can accurately measure even under 200% interference, with stable test data, suitable for conducting anti-interference dielectric loss tests on site.

2. High precision measurement

By using digital waveform analysis and bridge self calibration techniques, combined with high-precision three terminal standard capacitors, high-precision dielectric loss measurement can be achieved.

The input resistance of all ranges of the instrument is below 2 Ω, eliminating the influence of additional capacitance on the measurement cable.

3. Multi level security protection ensures personal and equipment safety

High voltage protection: The test sample can cut off the output at high speed by short circuit, breakdown or high voltage current fluctuation.

Low voltage protection: In case of accidental connection to 380V, power fluctuation or sudden power outage, the protection will be activated without causing overvoltage.

Grounding protection: When the instrument is poorly grounded and the casing carries dangerous voltage, the grounding protection is activated.

C V T: Four protection limits for high voltage and current, low voltage and current, which will not damage the equipment; Misselected menu will not output excitation voltage. There is no 10kV high voltage output during CVT measurement.