“…The service no-load losses are reliant on the core steel grade and are unvarying for a transformer during service [11] and [12]. The service load losses on the other side are dependent on the loading profile of the transformer [13] and [14]. Significant service losses of a transformer during service can potentially culminate in excessive heating and consequently degradation of insulation of materials due to overloading and presence of harmonics especially in renewable energy technologies suchlike wind and solar [15] - [20].…”