Cable Voltage Withstand Tester

Cable Series Resonance Technology Description:The TPXB series AC voltage withstand test equipment utilizes the adjustment of power frequency to achieve resonance between the reactor and the test capacitor, generating high voltage and high current on the tested item. This represents a new method and trend in high-voltage testing and has been widely applied both domestically and internationally.

Principle of Cable Series Resonance Technology:The TPXB series AC withstand voltage test equipment utilizes a dedicated SPWM digital waveform generator chip with a 16-bit frequency resolution, achieving a frequency fineness of up to 0.1Hz in the range of 20-300Hz. It employs an orthogonal asynchronous fixed carrier modulation method to ensure good waveform output across the entire frequency range. The power section features an advanced IPM module, ensuring stability and safety of the tester under minimal weight.

Composition of Cable Series Resonant Device:The TPXB series alternating current withstand voltage test equipment for cables is composed of a frequency-modulated voltage-regulating power supply, excitation transformer, reactor, and capacitance divider.

Series Resonance

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Series Resonant Function

The high-voltage test equipment for cables with voltage ratings of 35kV and below is widely used, and the testing workload is substantial. Therefore, such high-voltage test devices are compact, lightweight, and portable, giving rise to the emergence of portable cable high-voltage test systems.

2. The system requires that individual components weighing no more than 30kg can be moved on-site by a single person, and components weighing no more than 60kg can be moved on-site by two people, making it suitable for on-site transportation.

3. The power supply utilizes a single-phase 220V or a single 380V power source, facilitating on-site power access.

4. The reactor section utilizes dry epoxy casting for an aesthetically pleasing and reliable design, meeting the requirements of various cables.

5. For cable withstand tests at voltage levels of 110kV and above, oil-immersed reactors are used. When the unit weight exceeds 100kg, an optional dedicated small electric crane from our company is available.