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Product Analysis:
Under power frequency conditions, due to the large capacitance of the test object or the high test voltage requirements, the power supply capacity of the test device is correspondingly high. Traditional power frequency withstand voltage devices (AC withstand voltage test transformers) are often bulky and heavy, inconvenient for on-site handling, and not easy to combine arbitrarily, resulting in poor flexibility. In contrast, the variable frequency series resonance test device (with volume and weight approximately 1/10 to 1/30 of traditional test transformers) is compact, lightweight, and easy to move. It is also designed in a modular fashion, allowing flexible configuration of the number of reactors based on on-site requirements, greatly reducing labor intensity and improving work efficiency.
Main Applications:
A. AC withstand voltage test for 6kV-500kV high-voltage cross-linked cables
B. Power frequency withstand voltage test for 6kV-500kV transformers
C. AC withstand voltage test for GIS and SF6 switches
D. AC withstand voltage test for generators
E. AC withstand voltage test for other high-voltage power equipment such as busbars, bushings, and instrument transformers.
Widely used in power, metallurgy, petroleum, chemical and other industries, suitable for handover and preventive tests of capacitive test objects with large capacity and high voltage.
Product Aliases:
Variable frequency series resonance AC withstand voltage test device, variable frequency series resonance, variable frequency resonance device, series resonance, frequency modulation series resonance, series resonance withstand voltage test device, series resonance test equipment, cable withstand voltage test device, power frequency withstand voltage test device, cable AC withstand voltage test equipment, AC withstand voltage test device, frequency modulation series resonance AC withstand voltage test device, variable frequency resonance, variable frequency series resonance resonance test device, variable frequency resonance withstand voltage device, series resonance test device, series resonance withstand voltage device, GIS AC withstand voltage test device, generator withstand voltage test device, variable frequency resonance withstand voltage test device, etc.
Main Features:
1. Automatically searches for the resonant frequency, automatically boosts, steps down, and times the withstand voltage. During automatic tuning, the system sweeps from 30Hz to 300Hz and finally locks onto the resonant frequency precisely.
2. The variable frequency series resonance withstand voltage complete set device (35KV cable 1km) supports multiple test modes: "automatic tuning + manual voltage regulation", "automatic tuning + automatic voltage regulation", "manual tuning + manual voltage regulation", etc. The "automatic tuning + manual voltage regulation" mode is recommended, which quickly finds the resonance point and controls the test process through manual voltage regulation, ensuring higher safety.
3. The system has a user-friendly human-machine interface: test parameter settings, test control, and test results are displayed on the same screen, making it intuitive and clear, with automatic timing and operation prompts. Full touch screen operation and display, with test data storage and query functions.
4. Comprehensive protection functions. Overvoltage protection, overcurrent protection, flashover protection, and zero-position protection ensure system reliability.
5. The variable frequency series resonance withstand voltage complete set device (35KV cable 1km) uses imported power components, with stable voltage output and frequency output, reasonable electromagnetic compatibility design, and comprehensive protection functions.
6. After multiple high-voltage direct-to-ground short circuit tests, the system remains intact, and the system also has strong overload capacity.
