Lightning impulse withstand voltage(kV peak value)		1minMain frequency withstand voltage (kV RMS)
Full wave	Chopped wave
High voltage side	1050	1175	460
Neutral point of high voltage	(1050)		( 460 )
Low voltage side	170	185	70
Neutral point of low voltage	170		70

14 th. Insulation Level: A                                                                                                                                                                
15 th. Field strength between transformer winding turns is no more than 2kV/mm          
16 th. Transformer loss (under 75) no-load current and efficiency              
  No-load Loss: 92 kW   According to IEC standard                                                                  
          Load Loss: 356 kW     According to IEC standard                                                                    
          No-load current: 0.3 %   According to IEC standard                                                                    
17 TH. Radio interference and corona
  Under the Maximum phrase voltage, corona is not visible from outgoing terminal in the night of clear day at outdoor. Radio interference voltage is no more than 2500Uv                                                                                                                              
18 th. Overloading capability                                                                                                                                                                    
            Short-time overloading capability of transformer and overload running time are as fol   low:

Over current	30	45	60	75	100
Allowable running time min	120	80	45	20	10