Basic Electronics Notes

Three Phase Transformers

Three phase power distribution and transmission systems require the use of three phase transformers.

Instrument Transformer

High voltage and current cannot be measured by ordinary volt-meter and ampere meter. Instrument transformer are used for this purpose.

Transformers Tests

A number of tests are made on transformer to determine the voltage ratio, reactance of the windings, magnetizing current, core losses, copper losses, efficiency and temperature rise etc

Auto Transformer

An auto transformer has one winding only Part of this winding being common to both primary and secondary.

Diode Protection

A power diode must be protected against over-voltage, over-current and transients.