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WUHV - Resonant System for High Voltage Testing
The UHV Series Resonant System is specifically designed for conducting AC withstand voltage tests on high voltage capacitive equipment such as cross-linked cables, hydraulic generators, main transformers, and Gas Insulated Switchgear (GIS). The system is ideal for use by local, municipal, and country-level high voltage test departments and electric power installation and maintenance units. Its core components include a frequency conversion control power supply, an excitation transformer, a high voltage reactor, a capacitor voltage divider, and an optional compensation capacitor. The device provides robustness with features like overvoltage, overcurrent, and flashover protection, while offering flexibility through three operational modes: fully automatic, manual, and automatic tuning manual boost. The user-friendly interface employs DSP platform technology and allows data storage and retrieval for efficient testing ascertainment.
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
This device is mainly used for ac withstand voltage test of cross-linked cable, hydraulic generator, main transformer, bus, GIS, etc. It has a wide range of application and is an ideal withstand voltage equipment for local, municipal and count-level high voltage test departments and electric power installation and repair and test engineering units.
The device is mainly composed of frequency conversion control power supply, excitation transformer, reactor, capacitor voltage divider and compensation capacitor (optional).
Product nickname: series resonance, frequency conversion resonance, frequency conversion series resonance, series resonance test equipment, series resonance voltage withstand device, cable voltage withstand series resonance device