Variable Frequency AC Resonant Test Set
Variable Frequency Resonant Test Set is a specialized electrical testing system used to perform high-voltage tests on electrical insulation in equipment such as transformers, cables, switchgear, and other high-voltage components. This test set is designed to generate high-voltage AC by utilizing a resonant circuit that adjusts the frequency to match the resonant frequency of the test object. This approach enables efficient testing of insulation and dielectric strength, minimizing current draw and reducing the power requirements.
Huazheng Variable Frequency AC Resonant Test Set
introduction
The variable frequency AC resonant test set is a specialized device that operates on the principle of series resonance. By adjusting the power supply frequency, it enables the circuit current and voltage to reach their maximum resonant values, allowing AC withstand voltage testing to be performed on high-voltage electrical equipment such as cables, transformers, GIS, and more.
Technical Parameters
| Item | Specification |
| Rated Capacity | 160 kVA |
| Input Power | Single‑phase 220V or three‑phase 380V, 50 Hz input frequency |
| Rated Voltage | 160 kV |
| Rated Current | 1 A |
| Working Frequency | 30‑300 Hz |
The Working Environment
1. Ambient temperature: -100C -50 0C;
2. Relative humidity: ≤ 90% RH;
3. Altitude: ≤ 1000 meters;
advantages
Pure Sine Wave Output: Harmonic distortion rate <1%, with waveforms superior to grid frequency, preventing test misjudgments caused by waveform distortion.
Wide Frequency Range Adjustable: 30-300Hz continuous adjustment with a step size of 0.1Hz, no need to change reactors to match different loads.
Fully Automatic Tuning: DSP automatic frequency scanning, 15 seconds to lock the resonant point, no need for manual calculations, reducing operational complexity.
Integrated Multiple Protections: Over-voltage, over-current, flashover, and grounding protection. Output is cut off within 20ms in case of abnormalities, ensuring safety.
FAQ
Q: What is the resonant voltage multiplication factor (Q value) of the device?
A: Under no-load conditions, the resonant voltage multiplication factor (Q value) can typically reach 30-50, and under full-load test conditions, it can be maintained at 10-30 depending on the capacitive characteristics of the tested sample.
Q: What is the frequency precision and stability of the variable frequency power supply?
A: The output frequency precision can reach 0.01Hz, and the frequency stability is better than 0.05%, ensuring the accuracy of the tests.
Q: What costs are included in the product quotation, and does it include shipping and customs duties?
A: The standard quotation is typically the factory ex-works price (EXW), excluding shipping and destination customs duties. If required, please specify the desired trade terms (e.g., FOB, CIF, DDP, etc.).
Q: What is the typical international logistics delivery time, and what shipping methods are available?
A: Delivery time depends on the shipping method: sea freight typically takes 20-45 days; air freight typically takes 5-10 days. We offer sea freight, air freight, and multimodal transportation.
Q: How do I determine the accurate capacity and voltage rating for the required variable frequency resonant test system?
A: We need the customer to provide the type of sample most frequently tested (such as cables, GIS, transformers), along with the maximum capacitance value and highest test voltage. We will provide a professional selection calculation.
Product Cases
Company Profile
certification
Our company has obtained utility model patents, ISO 9001, CE, TÜV, and other certifications, ensuring that the products meet international quality standards.
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