Cable Voltage Withstand Test Equipment

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

Principle of Cable Series Resonance Technology:The TPXB series AC withstand voltage test device employs 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 utilizes an orthogonal asynchronous fixed carrier modulation method to ensure good output waveforms across the entire frequency range; the power section incorporates advanced IPM modules, ensuring the stability and safety of the tester under low weight.

Cable Series Resonant Device Composition: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 cables, 35kV and below, are widely used, leading to a substantial volume of testing work. Therefore, compact and lightweight dielectric strength test devices have been developed, giving rise to portable cable dielectric strength testing systems.

2. The system requires that individual components weigh no more than 30kg for manual handling by a single person on-site, and components requiring the effort of two people should not exceed 60kg, making it suitable for on-site transportation.

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

4. The reactor section utilizes dry epoxy casting, offering an aesthetically pleasing and reliable solution, suitable for various cable requirements.

5. Cable voltage withstand tests above 110kV utilize oil-immersed reactors. For units weighing over 100kg, an optional dedicated small electric crane from our company is available.