Introduction to the functional characteristics of ultra-low frequency withstand voltage test device

The ultra-low frequency withstand voltage test device is a specialized device used to test the withstand voltage performance of electrical equipment. The following is a detailed introduction to it:

1. Main purpose

Mainly used for voltage withstand testing of polyethylene insulated power cables, and can also be used for insulation voltage withstand testing of large power transformers. In addition, it can also be widely used in AC withstand voltage tests for cables, large high-voltage rotating motors, and power capacitors.

2. Working principle

The ultra-low frequency withstand voltage test device adopts ultra-low frequency high voltage to test the withstand voltage performance of power cables. Its working principle is to generate a low-frequency electric field, which reflects the degree of damage or aging of the cable insulation material through its voltage resistance performance. During testing, the instrument outputs low-frequency and high-voltage signals, which are applied to different polarities of the cable through testing electrodes to generate high electric field strength, causing the insulation of the cable to discharge or break down, thereby testing its voltage resistance performance.

3. Technical features

① Digital frequency conversion technology: Adopting advanced modern digital frequency conversion technology, the output of ultra-low frequency signals is stable and reliable.

② Microcomputer control: The processes of boosting, lowering, measuring, and protecting are fully automated and easy to operate.

③ Accurate data: Current, voltage, and waveform data are directly obtained through high-voltage side sampling, which is true and accurate.

④ Multiple protection: It has multiple protection functions such as overvoltage protection and high and low voltage side overcurrent protection to ensure testing safety.

⑤ Output without capacitance rise effect: Due to the use of high and low voltage closed-loop negative feedback control circuit, the output has no capacitance rise effect.

⑥ Intuitive display: Large screen LCD display, clear and intuitive, capable of displaying output waveforms and printing test reports.

4. Technical parameters

① Output voltage: usually includes ranges such as 0-30KV, 0-50KV, 0-80KV, etc.

② Output frequency: 0.1Hz, 0.05Hz, 0.02Hz, etc.

③ Load capacity: varies with the output frequency, such as a maximum of 1.1 μ F at 0.1Hz, 2.2 μ F at 0.05Hz, and 5.5 μ F at 0.02Hz.

④ Measurement accuracy: The indication accuracy of the voltmeter is ≤ 3%, and the indication accuracy of the ammeter is ≤ 5%.

⑤ Usage environment: It can be used indoors or outdoors, with a temperature range of -10 ℃~+40 ℃ and humidity ≤ 85% RH (or ≤ 90% RH, depending on the device model).

5. Advantages and Applications

Advantages:

① Small size, light weight, easy to carry and work outdoors.

② Easy to operate, automated testing process, greatly reducing the labor intensity of staff.

③ The accuracy and reliability of the data have improved the accuracy and reliability of the testing.

④ Multiple protection functions ensure the safety of the testing process.

Application:

① In the power industry, it is used to test the insulation performance of electrical equipment such as power cables and transformers.

② In the field of scientific research, it is used to study the performance changes of insulation materials and insulation structures for electrical equipment under ultra-low frequency electric fields.

③ It is also widely used in other applications that require testing the voltage resistance performance of electrical equipment, such as ships, aerospace, and other fields.

6. Precautions

Before using the ultra-low frequency withstand voltage test device, carefully read the instructions to understand the performance characteristics and usage methods of the device.

During the testing process, it is necessary to strictly follow the operating procedures to ensure the accuracy and safety of the test results.

Regularly maintain and upkeep the device to ensure its long-term good working condition.

In summary, the ultra-low frequency withstand voltage test device is a powerful, easy to operate, and accurate data testing device for electrical equipment, with broad application prospects in the power industry and other fields.

The ZC-524 B ultra-low frequency and high voltage generator combines modern digital frequency conversion advanced technology and adopts microcomputer control. The boosting, lowering, measurement, and protection are fully automated, and manual intervention can be performed during the automatic boosting process. Due to its full electronic design, it has a small size, light weight, large screen LCD display, clear and intuitive display, and a printer that outputs test reports. The design indicators fully comply with the standards of the power industry and are very convenient to use.

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