AC Resonance Test System EPCZ-560kVA / 40kV (can be applied on 100MW Generator and 10kV 35kV Cable)
The system is consisted by below units
- Variable Frequency Power supply
- Exciting Transformer
- HV Reactor
- Capacitive Divider
- Accessories Carrycase (connection wires)
Working Environment
- Environmental temperature: -15ºC to 40ºC
- Related humidity: ≤ 90% RH
- Altitude: ≤ 5000m
Application and requirement
- Meet the 15.6kV/1000MVA generator AC withstand voltage test, capacitance≤1.4uF, test frequency 45~65Hz, test voltage U≤34.8kV (2Un+3). Test time: 1 minute
- Meet 10kV/300mm2 cable AC withstand voltage test, capacitance≤1.12uF, test frequency 30~300Hz, test voltage U≤22kV. Test time: 5 minutes
- Meet 35kV/300mm2 cable AC withstand voltage test, capacitance≤0.398uF, test frequency 30~300Hz, test voltage U≤52kV. Test time: 60 minutes
- Meet the AC withstand voltage test of 10kV transformer, switch, etc., capacitance ≤0.0006uF, test frequency 30~300Hz, test voltage U≤35kV. Test time: 1 minute
System technical specifications
1 System technical data table
| Rated output voltage |
Rated output voltage: 0~40kV |
| Resonant voltage waveform |
sine wave, waveform distortion rate <1.0% |
| Maximum tested product current |
1.75A 14A |
| Maximum test capacity |
560kVA |
| Output frequency |
30~300Hz |
| Working time |
Continuous working time is 60min under full power output |
| Quality factor |
30~90 |
| Input working power |
Three-phase 380V±5%, 50Hz |
| Ambient temperature |
-15ºC~+40ºC |
| Relative humidity |
<90RH%, no condensation |
| Altitude |
<5000m |
| Noise |
≤50dB |
2 System performance characteristics
- Make full use of our company's advantages in electronic measurement technology and electromagnetic compatibility, completely independently develop, design and produce all components of this set of equipment including: variable frequency power supply, excitation transformer, cast high voltage reactor and high-precision capacitive voltage divider.
- Equipped with manual/automatic mode, large screen display, test parameter setting, and automatic timing and operation prompt functions.
- Possess multiple protection functions, such as: overvoltage, overcurrent protection, discharge protection, detuning protection, etc.
Device capacity determination
The capacity of the equipment is designed to be 560kVA/40kV divided into 8 reactors, and the single reactor is 40kV/1.75A/70H in combination to meet the test requirements of the above-mentioned tested product.
Conclusion determination:
1. 15.6kV/1000MW generator, electric capacity ≤1.4μF, test frequency 45-65Hz, test voltage 34.8kV.
Use 8 reactors in parallel, at this time the inductance is L=70/8=8.6H
Test frequency f=1/2π√LC=1/(2×3.14×√8.6×1.4×10-6)=45.2Hz.
Test current I=2πfCUTest =2π×45.2×1.4×10-6×34.8×103=13.77A
When 8 reactors are used in parallel, the maximum current is 14A, so 14A>13.77A, this set of equipment can meet the requirements of the above tested product.
2. 15.6kV/10MW generator, electric capacity ≤0.1μF, test frequency 45-65Hz, test voltage 34.8kV.Use 1 reactor, at this time the inductance is L=70
Test frequency f=1/2π√LC=1/(2×3.14×√70×0.1×10-6)=60Hz.
Test current I=2πfCUTest =2π×60×0.1×10-6×34.8×103=1.15A
The maximum current of 1 reactor is 1.75A, so 1.75A>1.15A, this set of equipment can meet the requirements of the above tested product.
Conclusion: The device capacity is set to 560kVA/40kV, divided into 8 reactors, and the single reactor is 40/1.75A/70H in combination to meet the test requirements of the tested product.
More details on AC Resonance Test System EPCZ-560kVA / 40kV please contact EP Hipot Electric.
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