Variable Frequency Anti-Interference Dielectric Loss Tester - Yangzhou Darui

Variable Frequency Anti-Interference Dielectric Loss Tester - Yangzhou Darui

Published: 2020-08-03 15:27:15

Category: Dielectric Loss Tester

Product Description

Variable Frequency Anti-Interference Dielectric Loss Tester

Recommended by Darui Electric

I. Product Introduction

The variable frequency anti-interference dielectric loss tester is a fundamental method in insulation testing, effectively detecting overall moisture, deterioration, and local defects in electrical equipment insulation. It is widely used in electrical manufacturing, equipment installation, acceptance tests, and preventive tests. Measuring the dielectric loss of transformers, instrument transformers, reactors, capacitors, bushings, and arresters is the most basic method to assess their insulation performance. This tester breaks away from traditional bridge measurement methods, adopting variable frequency power supply technology, utilizing microcontrollers and modern electronic technology for automatic frequency conversion, analog-to-digital conversion, and data processing. It offers strong anti-interference capability, fast testing speed, high accuracy, fully automatic digital operation, and simple handling. The power supply uses a high-power switching power supply, outputting pure sine waves at 45Hz and 55Hz, with automatic voltage boosting, providing up to 10kV. It automatically filters out 50Hz interference, making it suitable for on-site testing in environments with high electromagnetic interference such as substations. It is widely applicable for dielectric loss measurement of transformers, instrument transformers, bushings, capacitors, arresters, and other equipment in the power industry.

II. Technical Parameters

1. Measurement Range:

Capacitance: 4pF-60nF    Dielectric Loss: 0～100%

2. Accuracy:

   a) Capacitance Accuracy: ±(1.0% reading + 5pF)

   b) Dielectric Loss Accuracy: ±(1% reading + 0.04%)

3. Resolution:

   Capacitance Resolution: 0.001 pF

    Dielectric Loss Resolution: 0.001%

4. High Voltage Power Supply: Setting Range: 0.5~10kV      Output Current: 200mA

5. Low Voltage Output: Output Voltage 3--50V   Output Current 3—30A

6. Operating Environment:

   Power Supply: AC220V ±10%, 50±1Hz

   Operating Temperature: 0～40℃

   Ambient Humidity: ≤90%RH, non-condensing

III. Product Features

1. The variable frequency anti-interference dielectric loss tester uses the complex current method to measure capacitance, dielectric loss, and other parameters. The test results are highly accurate and facilitate automated measurement.

2. The instrument adopts variable frequency technology to eliminate on-site 50Hz power frequency interference, ensuring reliable data even in strong electromagnetic interference environments.

3. The instrument features a large LCD screen, and the testing process is guided by Chinese menu prompts, making it intuitive and easy to operate.

4. The instrument is easy to operate; the measurement process is controlled by a microprocessor. Once the appropriate measurement mode is selected, data measurement is automatically completed under microprocessor control.

5. It comes with built-in standard capacitors and a high-voltage power supply, facilitating on-site testing and reducing field wiring.

6. The variable frequency anti-interference dielectric loss tester has high measurement accuracy and can meet the requirements for oil dielectric loss measurement. Therefore, by simply equipping it with a standard oil cup and dedicated test leads, oil dielectric loss measurement can be achieved.

7. It includes a CVT test function, enabling self-excitation testing of CVTs without external accessories, measuring the capacitance and dielectric loss of C1 and C2 in one test.

8. The reverse wiring test adopts IVDDV technology, eliminating the previous instability of reverse wiring data.

9. It has a low-voltage shielding function for reverse wiring, allowing 10kV reverse wiring dielectric loss measurement of C11 without disconnecting the line when the 220kV CVT bus is grounded.

10. It has the function of measuring dielectric loss at high voltages, enabling dielectric loss tests above 10kV using a high-voltage transformer or series resonance.

11. Overcurrent protection function: the instrument is not damaged in case of short circuit or breakdown of the test object.

12. Ground protection function: when the instrument is not grounded or poorly grounded, it does not enter normal operation and does not output high voltage.

13. Electric shock protection function: if the operator accidentally gets an electric shock, the instrument immediately cuts off the high voltage to ensure the safety of the test personnel.

Note: The above information and technical parameters are compiled and published by Yangzhou Darui Electric Co., Ltd.

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Product Details

Variable Frequency Anti-Interference Dielectric Loss Tester - Yangzhou Darui