Series Resonance Test Device
UHV Series Resonant Test System for High-Voltage AC Withstand Testing
The UHV Series Resonant System is engineered for precision AC withstand voltage testing of critical power infrastructure including cross-linked cables, hydro generators, main transformers, and GIS equipment. Certified for municipal and county-level high-voltage test departments, this system sets the standard for electrical safety verification.
Product Parameters
The work environment
| Environment temperature | －100oC-50oC |
| Relative humidity | ≤90%RH |
| The altitude | ≤1000m |
Main technical parameters and functions of the device
| Rated Capacity | 324kVA |
| The input power | Three-phase 380V voltage, frequency: 50Hz |
| Rated Voltage | 54kV |
| Rated current | 6A |
| Working frequency | 30-300Hz |
| Device output waveform | Sine wave |
| Waveform distortion rate | Output voltage waveform distortion rate ≤1% |
| Working time | Continuous 60min is allowed under rated load; Overvoltage 1.1 times 1 min |
| Temperature rise | Temperature rise ≤65K after continuous operation under rated load for 60min |
| The quality factor | Device Q≥30(f=45Hz) |
| Protection function | Over current, over voltage and flashover protection (see frequency conversion power supply for details) |
| Accuracy of measurement | Effective value of the system is 1.5 |
Exciter transformer
| Rated Capacity | 9kVA |
| The input voltage | 0-400V，Single phase |
| The output voltage | 3kV |
| structure | dry type |
| Weight | About 50kg |
Variable frequency power supply
| Rated output capacity | 18kW |
| Working power supply | 380±10%V (three-phase), power frequency |
| The output voltage | 0-400v, single phase |
| Rated input current | 45A |
| Rated output current | 45A |
| Voltage resolution | 0.01kV |
| Accuracy of voltage measurement | 1.5% |
| Frequency range | 30-300Hz |
| Frequency regulation resolution | ≤0.1Hz |
| Frequency stability | 0.1% |
| Running time | Continuous 60min at rated capacity |
| Noise level | ≤50dB |
High voltage reactor
| Rated Capacity | 54kVA |
| Rated Voltage | 27kV |
| Rated Voltage | 2A |
| inductance | 68 H/single section |
| The quality factor | Q≥30(f=45Hz) |
| structure | dry type |
| Weight | About 75kg |
Capacitor divider
| Rated voltage | 60kV |
| High piezoelectric capacity | 2500pF |
| Dielectric loss | tgσ≤0.5% |
| Voltage division ratio | 1000：1 |
| measurement accuracy | Valid value of 1.5 |
| Weight | About 10kg |
Key Applications
Cross-linked cable commissioning tests
Transformer routine maintenance
Gas-insulated switchgear (GIS) diagnostics
Busbar insulation verification
Hydroelectric generator acceptance testing
System Configuration
Complete test solution includes:
Frequency conversion control power supply - Precision 0.1Hz stepping
Excitation transformer - Multiple tap configurations
High-voltage reactor - Modular design for flexible combinations
Capacitive voltage divider - ±1% measurement accuracy
Compensation capacitor (optional) - For extended range testing
Technical Advantages
Advanced Protection System
Multi-stage overvoltage protection (adjustable trip points)
Zero-start interlock safety circuit
Real-time system detuning detection
Sample flashover protection (≤1ms response)
Operational Features
Three test modes:
Fully automatic - One-touch test sequencing
Manual mode - Complete operator control
Auto-tune with manual boost - Optimal balance
DSP-based platform with upgradeable firmware
10.4" LCD with real-time sweep curve display
500-test data storage with alphanumeric coding
Field Performance Benefits
55% lighter than conventional test sets
Resonance point identification within 30 seconds
Customizable frequency sweep range (20-300Hz)
Industrial-grade IP52 enclosure for site durability
Compliance Standards
Meets or exceeds requirements of:
IEC 60270 Partial Discharge Measurement
GB/T 16927.1-2011 HV Test Techniques
DL/T 849.1-2019 Power Equipment Test Regulations
The UHV Series Resonant System represents the next generation of high-voltage test technology, combining advanced DSP control with practical field operation features for power utilities and electrical contractors.
