Define OLTC ?
OLTC - On Load Tap Changer
Also called On Circuit Tap Changer. For many power transformer appliactions, a supply interruption during a tap change is unacceptable,and the transformer is often fitted with more expensive and complex on load tap changing (OLTC, sometimes Load Tap Changer, LTC) meachanism. On load tap Changers may be generally classified as either meachanical, electronically assisted, or fully electronic.
