Difference between Ideal and Practical Transformer

Ideal transformer is an imaginary transformer devised for sake of analysis of a practical/real transformer. The main difference between an ideal and practical transformer is that former is having an efficiency of 100% while the latter have efficiency close to 100% (around 99%). Let us now discuss some more differences between ideal and practical transformer. … Read more

Ideal Transformer – Definition, Properties and Phasor

Definition: Ideal Transformer is a hypothetical transformer having infinite permeability core and zero core loss and ohmic loss. An ideal Transformer does not exist in reality. This is just a hypothetical transformer for sake understanding the actual transformer. Properties of Ideal Transformer: Following assumption are made to define an ideal transformer: Winding Resistance is negligible. … Read more

What is the Insulation Class of Transformer Oil?

Before we jump into the insulation class of Transformer Oil, it is imperative to discuss briefly about the insulation class. Insulation Class basically defines the maximum temperature at which an insulating material will perform its specified duty for the specified life on continuous basis. There are six insulation classes. These are tabulated below: Life of … Read more

Flash Point of Transformer Oil and its Importance

Flash Point of Transformer Oil is defined as the temperature at which light hydrocarbon present in the transformer oil starts evaporating causing a flash on introduction of source under specified condition. It is an important parameter which must be maintained above 140 degree Celsius. Light hydrocarbons are already present in the transformer oil and gets … Read more

Star Delta Starter and Its Working Principle

Start Delta Starter is a scheme for motor starting to reduce the inrush current during starting of the motor. This method of starting is quite popular for Delta connected Squirrel Cage induction motor. In this method, the motor is first started as a star connected motor and as soon as the motor reaches near to … Read more

Power Angle Curve of Synchronous Machine

Power Angle Curve of Synchronous Machine is the graphical representation of electrical output with respect to the power angle. As we know, power angle is also known as load angle, therefore it can be said that this curve is graphical representation of electrical output of generator with respect to load angle. In this article, we … Read more

Load Angle or Power Angle and It’s Significance

Load Angle in synchronous machine is defined as the angle between the filed mmf or flux and the resultant air gap mmf or flux. Load angle and power angle are same thing which are used synonymously. There are basically three different types of flux in a rotating electrical machine: Stator flux, Rotor flux and Resultant … Read more