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Machines

An electrical machine  converts mechanical energy into electrical energy or vice versa.  The transformer is also an electrical machine which transform the voltage without changing the frequency. We will discuss about the;

  1. DC Motor
  2. DC generator
  3. Induction Motor
  4. Transformer
  5. Electrical drives
  6. Alternator or synchronous generator

Why can a 50Hz CT work on 60Hz systems, and why can’t a 60Hz C.T. work on a 50 Hz system?

CT or PT functions on the principle of electromagnetic induction. The electrical energy is first converted into magnetic energy and again the magnetic energy is

What is the Insulation Class of Transformer oil?

We first discuss what it means by insulation class and what is its importance. The insulating material is classified according to the maximum temperature which

Dry Type Transformers: Types and Applications

What is a Dry Type Transformer? A dry-type transformer does not use any liquid for its cooling and insulation. An oil-filled transformer uses mineral insulating

Advantages and Disadvantages of Induction Motor

There are some of the advantages of induction motors compared to DC motors and synchronous motors. We will also discuss disadvantages of induction motors compared to

Resistance and Leakage Reactance or Impedance of Transformer

Leakage Reactance of Transformer The flux generated in the primary winding of the transformer gets linked with both the primary and secondary winding. However, all

parallel operation of transformers

Advantages of Parallel Operation of Transformers

Parallel operations of transformer: Definition-Connection of the primary winding of two transformers to a common supply voltage and connection of the secondary winding of both

How to Change the Direction of Rotation of DC Series Motor?

In this post, we will discuss how to change the direction of rotation of the DC Series Motor. The rotational force of the DC motor

What is no load Current of Induction Motor?

The current drawn by the induction motor when it is not coupled to the driven equipment is called the no-load current of the motor. The

Current Transformer – Construction, Phasor and Errors

This article describes the current transformer – construction, Phasor, and Errors. Current transformers are widely used for measuring high currents. The Current transformer steps down

why armature of alternator is star connected

Why is Armature of Alternator Connected in Star not in Delta?

The alternator armature winding must be protected from earth faults. The earth fault protection scheme for an alternator whose armature winding is connected in a

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