Buchholz’s Relay System
The Buchholz's system is used with oil immersed transformers.
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Basic Electronics Notes
Three Phase to Six Phase Transformer
Three single phase transformers, each with one primary winding and identical secondary windings Or a three
Three Phase Transformers
Three phase power distribution and transmission systems require the use of three phase transformers.
Voltage Current Characteristics of Diode
The V-I characteristics of a diode as shown in the figure show that When forward-biased, the diode begins to conduct current as the voltage across its anode is increased
Instrument Transformer
High voltage and current cannot be measured by ordinary volt-meter and ampere meter. Instrument transformer are used for this purpose.
Parallel Operation of Transformer
Need for Parallel operation
- When load on the system is increased, it is easy to ad
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.