Let’s take a look at this transformer here.A transformer is earthed three times. The metallic material, the surge diverter and the LV neutral.The national grid is supplied with three phase from a substation to a transformer through high tension power lines in three or single phase. The transformer steps down that power from 11kV to 415v for three phase low voltage lines or to 240v single phase low voltage power line.I guide you with the important information to help you understand everything con