Product Details

Working Principle:

Under the action of AC voltage, the dielectric consumes part of the electrical energy, which is converted into heat energy and causes loss. This energy loss is called dielectric loss. When AC voltage is applied to the dielectric, there is a phase angle difference Ψ between the voltage and current in the dielectric. The complementary angle δ of Ψ is called the dielectric loss angle, and the tangent tgδ of δ is called the dielectric loss tangent. The tgδ value is a parameter used to measure dielectric loss. The instrument's measurement circuit includes a standard circuit (Cn) and a test circuit (Cx). The standard circuit consists of a built-in high-stability standard capacitor and the measurement circuit, while the test circuit consists of the test object and the measurement circuit. The measurement circuit consists of a sampling resistor, a preamplifier, and an A/D converter. Through the measurement circuit, the amplitudes and phases of the current in the standard circuit and the test circuit are measured separately. Then, using a microcontroller with digital real-time sampling and vector operations, the capacitance value and dielectric loss tangent of the test object can be obtained.

The instrument has built-in anti-interference measures to ensure accurate measurement under external electric field interference.

Product Features:

1. The automatic variable frequency anti-interference dielectric loss tester (CTV) 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 automatic variable frequency anti-interference dielectric loss tester (CTV) uses variable frequency technology to eliminate on-site 50Hz power frequency interference, ensuring reliable data even in strong electromagnetic interference environments.
3. It adopts a large-screen LCD display, and the test process is guided by Chinese menu prompts, which is intuitive and easy to operate.
4. Simple operation: the measurement process is controlled by a microprocessor. Once the appropriate measurement mode is selected, data measurement is automatically completed under microprocessor control.
5. Integrated design: built-in standard capacitor and high-voltage power supply facilitate on-site testing and reduce on-site wiring.
6. High measurement accuracy meets the requirements for oil dielectric loss measurement. Therefore, only a standard oil cup and dedicated test leads are needed to achieve oil dielectric loss measurement.
7. Equipped with CVT test function, enabling self-excitation method testing of CVT without external accessories. Only one measurement is needed to obtain the capacitance and dielectric loss of C1 and C2.
8. The reverse wiring test uses IVDDV technology, eliminating the previous instability of reverse wiring data.
9. It has a reverse wiring low-voltage shielding function. When the 220kV CVT bus is grounded, dielectric loss measurement of C11 can be performed at 10kV reverse wiring without disconnecting the line.
10. The automatic variable frequency anti-interference dielectric loss tester (CTV) has the function of measuring dielectric loss at high voltage, enabling dielectric loss tests above 10kV using a high-voltage transformer or series resonance.
11. Ground protection function: when the instrument is not grounded or poorly grounded, it does not enter the normal program and does not output high voltage. Overcurrent protection function: the instrument is not damaged in case of short circuit or breakdown of the test object.
12. 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.

Product Introduction:

  It uses the complex current method to measure capacitance, dielectric loss, and other parameters. The test results are highly accurate and facilitate automated measurement. The instrument uses variable frequency technology to eliminate on-site 50Hz power frequency interference, ensuring reliable data even in strong electromagnetic interference environments. The instrument adopts a large-screen LCD display, and the test process is guided by Chinese menu prompts, which is intuitive and easy to operate. The instrument is simple to operate, and the measurement process is controlled by a microprocessor. Once the appropriate measurement mode is selected, data measurement is automatically completed under microprocessor control. Integrated design: built-in standard capacitor and high-voltage power supply facilitate on-site testing and reduce on-site wiring.

Main Features:

1. It has positive/reverse wiring working modes.    

2. Only a standard oil cup and dedicated test leads are needed to achieve oil dielectric loss measurement.

3. It uses variable frequency technology to eliminate on-site power frequency interference, ensuring reliable data even in strong electromagnetic interference environments.

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

5. Built-in standard capacitor and high-voltage power supply facilitate on-site testing and reduce on-site wiring.

6. Large-screen LCD display with Chinese menu prompts for the test process, which is intuitive and easy to operate.

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