What current flows in the transformer primary when its secondary is open?

When the secondary is open, there is no current in the secondary of the transformer. The
primary takes a small current I0) from the source called no-load current which has a magnetizing component (I0 sin?0) producing the magnetic flux and a working component (I0 cos?0) supplying real power for iron losses.

Leave a Reply

Your email address will not be published. Required fields are marked *