Advantages and disadvantages analysis of fully automatic anti-interference dielectric loss tester

The advantages and disadvantages of the fully automatic anti-interference dielectric loss tester are analyzed as follows:

1. Advantages

① Strong anti-interference ability:

Adopting an automatic tracking interference compensation circuit, combined with vector operation method and phase shifting method, effectively eliminates the influence of strong electric field interference on measurement, suitable for on-site testing of 500kV and below power stations.

Some testers use frequency conversion technology, such as 45Hz, 50Hz, and 55Hz frequency signals, which can accurately measure under strong electric field interference.

② High measurement accuracy:

High resolution, with a measurement resolution of 0.01% for dielectric loss (tg δ) and 1pF for capacitance (Cx).

Wide measurement range, capable of covering the dielectric loss and capacitance measurement needs of various high-voltage equipment.

③ Easy to operate:

Integrated structure, built-in standard capacitors and boost power supply, small size, light weight, easy to carry.

The wiring is simple, all cables have grounding shielding, and can be dragged to the ground for use.

Chinese menu operation, the microcomputer automatically completes the entire measurement process, and the results are read directly without conversion.

④ Fully functional:

Positive/reverse wiring, internal/external standard capacitors, and internal/external test voltages can be selected for measurement.

Equipped with CVT measurement function, the unique self-excited method measures CVT without the need for any external equipment.

Equipped with a micro printer, it can print and output measurement results and status.

Equipped with RS232 interface, it can be connected to a computer for easy data statistics, processing, and storage.

⑤ Complete security protection:

High voltage protection: It can quickly cut off the high voltage output in case of short circuit, breakdown or high voltage current fluctuation of the test sample.

CVT protection: Set the overcurrent point of the self-excited voltage. Once the set current value is exceeded, the instrument will automatically exit the measurement.

Grounding detection: The instrument has a grounding detection function and cannot measure voltage when not grounded.

Anti misoperation: With anti misoperation design, it can identify common wiring errors and provide safety alarms.

Prevent “capacity rise”: When measuring large capacity test samples, it can automatically track the output voltage and maintain a constant test voltage.

⑥ Widely applicable scenarios:

Suitable for on-site fully automatic measurement of dielectric loss tangent and capacitance of various high-voltage power equipment in power plants, substations, etc.

The same applies to measuring the TG δ and capacitance of high-voltage electrical equipment in workshops, laboratories, and research institutions.

The loss testing of insulating oil also has the advantages of convenience, simplicity, and accuracy.

2. Disadvantage

① High price:

Due to the use of advanced technology and high-quality materials, the price of fully automatic anti-interference dielectric loss testers is usually higher.

② There are certain requirements for operators:

Although the operation is simple, the operator still needs to have certain knowledge of electricity and testing experience to ensure the accuracy and safety of the test results.

③ Affected by environmental factors:

Although it has anti-interference ability, its testing performance may be affected to some extent in extremely harsh environments such as strong electromagnetic interference, extreme temperatures, etc.

④ Maintenance cost:

As a precision testing instrument, the maintenance cost of the fully automatic anti-interference dielectric loss tester is relatively high and requires regular calibration and maintenance.

The ZC-221 Tan Delta tester breaks through the traditional bridge measurement method, adopts variable frequency power supply technology, and uses single-chip microcontrollers and modern electronic technology for automatic frequency conversion, analog/digital conversion, and data operation. It has achieved strong anti-interference ability, fast testing speed, high accuracy, automatic digitization, and convenient operation. The instrument adopts a high-power switching power supply, outputs pure sine waves at 45Hz and 55Hz, automatically applies voltage, can provide up to 10kV voltage, automatically filters 50Hz interference, and is suitable for on-site testing of electromagnetic interference in substations and other places. Widely used for dielectric loss measurement of transformers, bushings, capacitors, lightning arresters and other equipment in the power industry.

Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com