Picture The voltage regulation methods of transformers are divided into two types: non-excitation voltage regulation and on-load voltage regulation.
Non-excitation voltage regulation is to regulate the voltage by changing the high-voltage side tap to change the number of winding turns when both the primary and secondary sides of the transformer are disconnected from the power supply.
On-load voltage regulation uses an on-load tap-changer to change the high-voltage winding tap to change the number of high-voltage turns without cutting off the load current.
