Amazed why secondary of current transformer should not be open? If it is left open it may destroy the current transformer. So it is very important that the secondary of …
Continue ReadingWhy Current Transformer (CT) Seconday Should not be Open ?
Ideal Transformer An ideal transformer is one that has no winding resistance no leakage flux i.e., the same flux links both the windings no iron losses (i.e., eddy current and …
Even though the basic functions of the oil used in transformers are heat conduction and electrical insulation, there are many other properties which make a particular oil eminently suitable. Properties of good transformer …
What is the Percentage Impedance? The percentage impedance of a transformer is marked on most nameplates – but what is it and what does the Z% figure mean? The impedance …
Continue ReadingPercentage Impedance of Transformer and Its Calculation
An induction motor may be considered to be a transformer with a rotating short-circuited secondary. The stator winding corresponds to the transformer primary and the rotor winding to the transformer …
Continue ReadingComparison between Induction Motor and Transformer
Gas-insulated substations (GIS) have been used in power systems over the last three decades because of their high reliability, easy maintenance, small ground space requirement, etc. This article is an …
Continue ReadingIntroduction to Gas Insulated Substations / Switchgears (GIS)
Depending on the type of construction used, the transformers are classified into two categories. Core type Transformer Shell type Transformer Difference between Power Transformer and Distribution Transformer Core Type Transformer In …
We have already given an introduction to substation earthing system in an article published earlier. Today we are going to discuss the design of substation earthing system. Before 1960s the …
Transformer oil testing is just like a blood test in the human body. A blood test provides a doctor with a wealth of information about the health of a patient. …