The ability to withstand a short circuit is recognised more and more as an essential characteristic of power transformers.
IEC60076-5 specifies short-circuit testing and how to check the withstand capability
One of last projects of SEA tested has been positively at CESI laboratory during October 2017.
The above-mentioned three-phase three-windings liquid immersed transformer, has the following electrical features:
Rated Power: 50 MVA
Primary Voltage: 150 kV
Regulation: ± 9 × 1,5%
Secondary MV Voltage: 21,3 kV
Secondary LV Voltage: 8,96 kV
Vector Group: Yyn0Yn0
Rated Frequency: 50 Hz
SEA through this further test has once again confirmed the reliability of its HV power transformers.