High-voltage Cable Tensile Strength Test

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

Cable series resonance technology principle:The TPXB series AC voltage withstand test device utilizes a dedicated SPWM digital waveform generator chip, with a 16-bit frequency resolution, achieving a frequency fineness of up to 0.1Hz between 20~300Hz. It employs an orthogonal asynchronous fixed carrier modulation method to ensure good output waveforms 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 AC voltage withstand test equipment consists of a frequency-modulated voltage regulator, excitation transformer, reactor, and capacitor voltage divider.

Series Resonance

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Series Resonant Function

The high-voltage cable testing equipment for 35kV and below voltage levels is widely used, resulting in a substantial volume of testing work. Therefore, such withstand voltage testing devices are compact, lightweight, and portable, leading to the birth of the portable cable withstand voltage testing system.

2. The system requires that individual components weigh no more than 30kg for manual handling by one person on-site, and components that require two people to handle should not exceed 60kg, making it suitable for on-site transportation.

The power supply utilizes a single-phase 220V or a single 380V power source, making it convenient for on-site electricity access.

4. The reactors are partially采用 dry-type epoxy casting, offering both aesthetic appeal and reliability, suitable for various cable requirements.

5. High-voltage cable with voltage levels of 110kV and above uses oil-immersed reactors for withstand tests. For units weighing over 100kg, our company's dedicated small electric crane can be optionally fitted.