Therefore, power is no longer transferred from primary to secondary in this approximation, and negligible current goes through the secondary windings.
32.
These turns act like a single-turn short-circuited transformer secondary winding; the large currents induced in them cause power losses.
33.
The zirconia acts as the " secondary winding " of a transformer which in effect is " shorted " out and thus gets hot.
34.
Line side and equipment side windings are more useful concepts than the more usual primary and secondary windings when discussing these kinds of transformers.
35.
As a simple example, a typical ignition coil may have a secondary winding resistance of 4000 ohms and a secondary current of 400 milliamperes.
36.
Since no current passes through the secondary windings, no magnetic field is created, which means zero current is induced on the primary side.
37.
This varying magnetic field at the secondary winding induces a varying electromotive force ( EMF ) or voltage in the secondary winding due to electromagnetic induction.
38.
This varying magnetic field at the secondary winding induces a varying electromotive force ( EMF ) or voltage in the secondary winding due to electromagnetic induction.
39.
For example, a 4000 : 5 CT secondary winding will supply an output current of 5 amperes when the primary winding current is 4000 amperes.
40.
The ratio of turns in the secondary winding to the number of turns in the primary winding, is called the " turns ratio ".
