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Resonant test system UHV seriescompactmodularportable
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Characteristics
- Test type
- resonant
- Configuration
- compact, modular, portable, on site
- Other characteristics
- automatic, high-voltage, high-power
Description
Product Overview
Alternate designation
Main technical parameters and functions
Features of Series Resonant AC Test System
Applications of AC Resonant Test System
Why is series resonance used for voltage withstand test instead of using power frequency transformer directly?
- The UHV-75kVA/75kV Series Resonant AC Test System is designed for handover, commissioning and preventive testing of large-capacity, high-voltage capacitive test objects. The system is DSP-controlled, lightweight and portable for on-site use and integrates multiple protection mechanisms including overvoltage, overcurrent, zero-start and system mismatch (flashover).
Alternate designation
- UHV-75kVA/75kV AC Resonant Test System
Main technical parameters and functions
- Rated capacity: 75 kVA
- Rated voltages: 25 kV; 75 kV
- Rated currents: 3 A; 1 A
- Measurement accuracy: system RMS level 1.5
- Operating frequency: 30–300 Hz
- Output waveform: sinusoidal, distortion ≤ 1%
- Quality factor: Q ≥ 30 (at 45 Hz)
- Input power: single-phase 220 V or three-phase 380 V, 50 Hz
- Continuous operation: 60 min at rated load; short overpressure 1.1× for 1 min
- Temperature rise: ≤ 65 K after 60 min at rated load
- Operating environment: −20 °C to 55 °C, ≤ 90% RH, altitude ≤ 3000 m
Features of Series Resonant AC Test System
- DSP platform control for precise frequency adjustment and stable output
- Portable, lightweight design for field deployment
- Multiple protection functions: overvoltage, overcurrent, zero-start, system detuning/flashover
- Low-distortion sinusoidal output suitable for capacitive testing
Applications of AC Resonant Test System
- Delivery acceptance and preventive testing of large-capacity high-voltage capacitive equipment
- On-site commissioning, acceptance and diagnostic tests
Why is series resonance used for voltage withstand test instead of using power frequency transformer directly?
- There are three pain points when using a power frequency transformer directly:
- The capacity requirement is extremely high: when testing long cables, the large capacitance can cause a huge reactive current at power frequency, requiring a power supply of hundreds or even thousands of kilovolt amperes.
- Heavy equipment: The volume and weight of the power frequency transformer are astonishing, making it difficult to transport on site.
- Waveform distortion: Under high capacity, the power supply has poor load capacity and the waveform is prone to distortion.
- Resonant test system cleverly solves these problems: by utilizing the characteristic of reactive power cancellation between inductance and capacitance during resonance, the power supply only needs to provide the active power of the total system loss. This makes the device lightweight, and the output waveform is a pure sine wave, with less insulation damage.
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Resonant Test System
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