Ultra low frequency cable withstand voltage tester, also known as ultra-low frequency withstand voltage tester or ultra-low frequency cable withstand voltage test device, is a specialized equipment used to test the insulation performance of cables and other electrical equipment. Here is a detailed introduction to it:
1. Definition and Working Principle
① Definition: The ultra-low frequency cable withstand voltage tester is a testing instrument based on alternating current, which evaluates the withstand voltage performance of cable insulation materials by generating a low-frequency electric field.
② Working principle: The tester generates low-frequency and high-voltage signals through a generator, which are applied to different polarities of the cable through test electrodes to generate high electric field strength. Under the action of an electric field, the insulation of a cable may undergo discharge or breakdown, reflecting its voltage resistance performance.
2. Main features
① Ultra low frequency signal: Testers typically use frequencies of 0.1Hz or lower to simulate long-term electric field effects, in order to evaluate the tolerance of insulation materials under actual working conditions.
② Safety and economy: Compared with high-frequency AC or DC voltage testing, ultra-low frequency testing can reduce insulation damage and reduce the required test power capacity, making testing safer and more economical.
③ High precision and reliability: The tester has the advantages of high precision and high reliability, and can accurately measure parameters such as the dielectric strength and dielectric loss of cables.
3. Composition and Function
① Generator: used to generate low-frequency and high-voltage signals.
② Voltage tester host: processes and controls signals, including setting test parameters, displaying test results, etc.
③ Test electrode: used to apply an electric field to the cable.
④ Cable interface: Connect to the tested cable.
In addition, the tester may also include control devices such as touch screens, buttons, remote controls, as well as safety protection devices such as overcurrent protection, overvoltage protection, and short circuit protection.
4. Test scope and application
① Testing range: The testing range of the ultra-low frequency cable withstand voltage tester usually includes a voltage range of 0-200kV and a current range of 0-10mA (or higher).
② Application: The tester is mainly used to test the insulation strength of high-voltage power cables, cable accessories, cable connectors, transformer windings and other equipment. Through testing, it is possible to detect whether the cable has insulation weaknesses or faults, and determine whether it can withstand the voltage requirements under normal operating conditions.
5. Precautions for use
Before use, it is necessary to accurately set parameters and perform correct wiring and calibration.
During the testing process, it is necessary to maintain the stability of the surrounding environment to avoid interference that may affect the test results.
The tester should be regularly maintained and serviced to ensure its long-term stable operation.
In summary, the ultra-low frequency cable withstand voltage tester is an important tool for testing power equipment, with advantages such as high precision, high reliability, and safety. It has wide application value in the power industry and is of great significance for ensuring the safety and reliability of power equipment.
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
