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 | |
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 |
