III. Test priciple :


VF: Variable Frequency Power Source T : Excitation Transformer
L : Test Reactor Cx: Tested Equipment MOA1: Lightning Arrestor
C1,C2: Voltage divider(C1 is high voltage arm,C2 is low voltage arm )


IV. General Technical Data:

1. Mode of system test: Series resonant with variable frequency
2. System model : CHX-4000KVA/200KV,400KV,600KV, 800KV,1000KV
3. Input power supply : 380±10%(three-phase),50Hz/60Hz
4. Number of HV test reactor: 4pieces
5. Rated output capacity: 4000kVA
6. Rated output Voltage: 200KV,400KV,600KV,800KV,1000KV
7. Max Test voltage : no more than 200KV,400KV,600KV,800KV,1000KV
8. Rated output current: 4A /single piece or in series；16A or 20A in parallal
9. Reg. Freq range : 20Hz-300Hz
10. Output Resonance voltage waveform: sine wave
11. THD of output waveform: ≤1%
12. Insulation level: Under 1.1 times and keeping 1min, normal
13. Duty cycle : 60mints optional on under rated current working condition ;
14. Quality factor of test set itself: Q≥60
15. Temperature rise: Less than 65K under rated current working withn duty cycle;
16. Noise level: No more than 70B
17. Reactor Structure: oil immersed type, epoxy tube cylinder type；

V. Technical Feature and advantage

• Modular design, being able for series-parallel connection of reactors,wide range of application.
• Operating frequency range:20-300Hz
• High quality factor value:Q ≥ 100(when f=20Hz) large thermal capacity, low temperature rise, long
• continuous of performance period
• Convenient for field test for the size and weight smaller than conventional test transformers.
• The output voltage waveform is sine wave, the waveform deviation factor ≤ 1％
• This device can be furnished with special test vehicle and container together
• PD free design optional.

VI. Main Measuring and control software panel as following :

VII.Accessories

• Accessory box for storage accessoires
• Input cables of power source
• Output cables of power source
• Output cables of exciting transformer
• System grounding cables
• Parallel cables of the reactor
• HV measuring cables ( the signal output cables of voltage divider )
• HV output cables(reactor to divide,divider to test object)
• Supporting base for divider
• Corona ring for test reactor and divider
• A final test report, a quality Certificate ,a user manual and a packing list are offered .

VIII. Other Typical Model

1 For 123KV ~300KV class GIS on-site AC hipot test

2 For 145KV ~362KV class GIS on-site AC hipot test

3 For 170KV ~550KV class GIS on-site AC hipot test

4 For 123KV ~800KV class GIS on-site AC hipot test

IX. On-site insulation test standard table from IEC 62271-203:2011 for HV GIS