Tap changer
A tap changer is a component of a transformer. It controls the transformer's output voltage by adjusting its winding ratio within some range of step levels.[needs simplifying] The tap changer can be done manually or automatically and either when the transformer is energized (On Load Tap Changer; OLTC) or when it is off (Off Circuit Tap Changer; OCTC).
Tap Changer Media
Motor drive unit of a on-load tap-changer.
A mechanical On load tap changer (OLTC), also known as under-load tap changer (ULTC) design, changing back and forth between tap positions 2 and 3
