Three phase power distribution and transmission systems require the use of three phase transformers.
Basic Electronics Notes
Rotating Core Transformer
It is also called induction regulator.
Figure 1 shows the V-I characteristics of a diode.
High voltage and current cannot be measured by ordinary volt-meter and ampere meter. Instrument transformer are used for this purpose.
Need for Parallel operation
- When load on the system is increased, it is easy to
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
An auto transformer has one winding only Part of this winding being common to both primary and secondary.
A power diode must be protected against over-voltage, over-current and transients.
An ideal switch is shown in Figure 1.
Diodes in DC Circuits
To analyze diode circuits, the state of the diode (on or off) mus