This 750KVA/350KV AC high voltage test system is applicable for AC withstand voltage test , PD test, Dielectric loss measurement and other high voltage for bushing ,switchgear, transformer, instrument transformer and insulator.  This system is for in door using and request 380v power supply and good grounding system.  1. Operation conditions:  Altitude: ＜1000m Ambient Temperature: -10℃ -- +40℃  Relative Humidity: ≤90%(at 25℃) Max Daily Temp Difference: 15℃  Atmospheric humidity: 11g/m3 Anti Earthquake: ≤ Class 7  Environment: Indoor  No conductive Dust  No fire and explosion danger  No corrosive gas  Power voltage with sine waveform waveform distortion rate ＜ 3%  Having reliable grounding, grounding resistance value ＜ 0.5 Ω   2. Main Components   YWDT-700/350 Testing Transformer   TDYZ-250/0.38/0-0.65 voltage regulator   TRF 350-0.0004 capacitive divider    DBK-500/0.6 Compensating reactor    GWR350-5-2 Protective resistor    AC-2000 measurement and control system    Front/ real low voltafe switch cabinet    LBQ-700/0.6 filter    Accessories: control cable