An electrical machine is a device which converts mechanical energy into electrical energy or vice versa. Thus, electrical generators and el...

Industry experts say that toroidal transformers are small in size and are typically used when there is a need for a transformer that of...

What is a Buchholz relay? Buchholz relay is a safety device which is generally used in large oil immersed transformers (rated more tha...

Sometimes, it becomes necessary to connect more than one transformers in parallel, for example, for supplying excess load of the rating o...

No transformer is truly an ' ideal transformer ' and hence each will incur some losses , most of which get converted into heat. If...

Instrument Transformers How will you measure AC currents and voltages of very high magnitude? You will need the measuring instruments ha...

Three phase transformer connections In three phase system, the three phases can be connected in either star or delta configuration. In cas...

Usually power is generated and distributed in three phase system, and therefore it is obvious that we would need three phase transformers ...

  An auto transformer is an electrical transformer having only one winding. The winding has at least three terminals which is explained...

Sumpner's test or back to back test on transformer is another method for determining transformer efficiency , voltage regulation and h...

These two transformer tests are performed to find the parameters of equivalent circuit of transformer and losses of the transformer . Open ...

In a practical transformer - (a) Some leakage flux is present at both primary and secondary sides. This leakage gives rise to leakage re...

Losses in transformer In any electrical machine , 'loss' can be defined as the difference between input power and output power. A...

Magnetic leakage In a transformer it is observed that, all the flux linked with primary winding does not get linked with secondary wi...

In a transformer , source of alternating current is applied to the primary winding. Due to this, the current in the primary winding (called...

An ideal transformer is an imaginary transformer which has - no copper losses (no winding resistance) - no iron loss in core - no leak...

Electrical transformer is a static electrical machine which transforms electrical power from one circuit to another circuit, without chan...