Series Resonance Test Device
LHV Variable Frequency Series Resonant Testing System
Product Overview
The frequency conversion series resonant test system utilizes series resonance principle to perform AC/DC withstand voltage tests on:
Cross-linked cables
Power transformers
GIS equipment
Generators and busbars
Ideal for utility companies, HV test labs, and electrical maintenance teams.
Product Parameters
technical parameter
| Rated output voltage | 0～1000kV and below |
| output frequency | 30～300Hz |
| Resonance voltage waveform | Pure sine wave, waveform distortion rate≤1.0% |
| Working time | Full power continuous working time of 60min |
| Quality factor | 30~90 |
| Frequency regulation sensitivity | 0.1Hz |
| Instability | ＜0.05% |
| Working power supply | Single-phase 220V or three-phase 380V±10% |
| Power frequency 50Hz±5% |
Serial product configuration(Application range (10kV ~ 500kV voltage grade substation electrical equipment ac withstand voltage equipment, frequency 30 ~ 300Hz))
| Product model name | Variable frequency source | Resonant reactor | Exciter transformer | Voltage divider | Scope of application |
| UHV-50/50 | 4kW | 25kV/1A two(dry) | 4kVA(dry) | 50kV | 1000kVA and below 10kV power transformer. 10kV switch , bus, PT, CT, etc. 10 kv (300mm2) cable 1.0 km or less |
| UHV-108/108 | 6kW | 27kV/1A four(dry) | 6kVA(dry) | 110kV | 31500kVA and below 35kV power transformer. 35kV switch , bus, PT, CT, etc. 10 kv (300 mm2)cable≤2km.35kV (300mm2)cable≤0.5km |
| UHV-200/200 | 10kW | 50kV/1A four(dry) | 10kVA(dry) | 200kV | 50000kVA and below 110kV power transformer.110kVGIS、PT、CT etc.(Preventive test).35kV(300mm2)cable≤1.0km.10kV (300mm2)cable≤2.0km |
| UHV-270/270 | 15kW | 45kV/1A Six sets of(dry) | 15kVA(dry) | 300kV | 50000kVA and below 110kV power transformer.110kVGIS、PT、CT etc..35kV(300mm2)cable≤1.2km.10kV (300mm2)cable≤3.0km |
| UHV-800/400 | 30kW | 50kV/2A eight(dry); 100kV/2A four(oil-immersed) | 30kVA(dry); 30kVA(oil-immersed) | 400kV | 80000kVA and below 220kV power transformer.50000kVA and below 110kV power transformer.110kV/220kVGIS、PT、CT etc..35kV(300mm2)cable≤2.0km.110kV (300mm2)cable≤0.7km |
| UHV-1600/800 | 60kW | 200kV/2A four(oil-immersed) | 60kVA(dry) | 800kV | 220kV power transformer of 80000kVA and below.50000kVA and below 110kV power transformer.500kVGIS、PT、CT etc..220kV switch 、GIS、PT、CT etc..110kV(400mm2)cable≤1.5km.220kV (400mm2)cable≤1.0km |
Note:
The appearance of the product shall be subject to the actual product，technical parameters with model if there are any changes，without notice.In case of misappropriation or copying, legal liability will be investigated.
System Components
Core Configuration:
Frequency conversion control power supply
Excitation transformer
High-voltage reactor
Capacitive voltage divider
Optional compensation capacitor
Key Technical Advantages
| Feature | Benefit |
|---|---|
| Dry epoxy insulation | High mechanical strength + superior dielectric properties |
| Compact reactor design | 30% lighter weight than conventional models |
| Multi-mode operation | Supports automatic/semi-auto/manual testing |
| Wide input voltage | 220V single-phase or 380V three-phase compatible |
Application Scenarios
Standard Compliance Testing:
IEC 60270 Partial Discharge Measurement
IEEE Std 400 Cable Testing
GB/T 16927.1 HV Test Procedures
Field Applications:
Pre-commissioning cable tests
Transformer routine maintenance
GIS installation verification
Generator winding integrity checks
Technical Specifications
Output Frequency Range: 30-300Hz
Temperature Rise: ≤45K at rated load
Protection Class: IP54 (standard)
System Q Factor: ≥40 (typical)
Waveform Distortion: THD ≤1%
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