How to test E-I Transformer having 10 terminals (pins) 5 on each side ? thanks
With an ohm meter determine the resistance of each winding.Resistance will be determined by wattage(input) of xformer
If a transformer has shorted turns, every winding will show drastically reduced inductance than is required for the circuit to operate. For example, the inductance of an audio transformer has to be at least L Z/(2piF), where F is the lowest frequency, audio ~20Hz and Z is the circuit impedance. So an 8 Ohm speaker winding should have 60mH or more inductance. The resistance of the winding should be less than 10% of the operating impedance. The maximum operating frequency of a transformer is something less than the self resonance and the minimum load is that which provides critical damping of the self resonance. So large transformers just work better since they have more inductance and less resistance With a signal generator, scope and some series resistors, you can find the inductance etc.
