What is Tap changer?
{{jargon|date=February 2024}} [[File:CD242tapchanger2011a.jpg|thumb|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]]. The tap changer can be done [[Manual|manually]] or [[Automation|automatically]] and either when the transformer is energized ('''On Load Tap Changer'''; '''OLTC''') or when it is off ('''Off Circuit Tap Changer'''; '''OCTC'''). [[Category:Electricity]] {{science-stub}}