Series resonant step-up

CVT verification uses a resonant step-up test device consisting of: variable frequency source, excitation transformer, reactor, voltage divider, capacitor, and control box.

The principle of the resonant step-up test device for CVT verification: The TPXB CVT verification resonant step-up device requires the test frequency to be conducted at 50Hz during verification. Additionally, the on-site geographical conditions are complex, making it difficult for traditional experimental devices to meet the requirements for on-site transportation and testing. The TPXB CVT verification resonant step-up device is the first adjustable resonant device in China to be used for on-site verification.

Series Resonant Test Device Test Object: Widely Used DomesticallyField calibration of capacitive voltage transformers up to 500kV.

Series Resonance

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Series Resonant Function

Output voltage and current waveforms are excellent, with distortion less than 0.5%.

2. The required energy storage capacity is small, with the power capacity needed being 1/Q of the test capacity, and the Q value can range from 20 to 60.

3. No over-voltage protection is required. When the test sample is punctured, the system becomes out of tune, the resonant high voltage disappears, and the reactor immediately limits the short-circuit current, preventing further damage to the test sample.

4. Designed for easy on-site relocation, the device is a dry-type combined series resonant unit, consisting of an excitation transformer and multiple resonant reactors. Each component unit is compact in size and lightweight.

5. The protection features are comprehensive, including zero-point protection (preventing system startup when the voltage output control knob is not at zero), over-voltage protection, over-current protection, and arc protection, ensuring the reliability of the system.