The three-phase induction motor is one of the most popular and most widely used electric motors. They are used in many applications due to their simple and rugged construction with almost maintenance-free operation. It is an asy…
Errors in Potential Transformer : The potential transformer also introduces the ratio error and phase angle error just like the current transformer. Ratio Error : Due to a change in load conditions in the distributi…
What is Critical Field Resistance of DC Shunt Generator ? It is defined as the amount of field resistance required to generate emf in the armature winding. (or) The critical field resistance is defined as the field resistance of…
The working principle of induction motor is similar to transformer i.e., the primary and secondary windings of a transformer are referred to as stator and rotor in case of induction motor. The transformer works on the princ…
Generally, Swinburne's test is the most popular testing method of dc machine to determine losses and efficiency. It is an indirect method of testing a dc machine performed without actually loading the machine. Since it is a n…
In the last article, we have seen Swinburne's Test of dc machine, where the efficiency and losses are determined without applying actual load on the machine. It is an indirect method of testing a dc machine. Now let us see an…
Armature winding is the essential part of any electrical machine (motor or generator). The emf or voltage will be induced in the armature winding in the case of a generator, while it produces torque to rotate the shaft in the cas…
During the operation of single-phase ac motors, it experiences various faults at the time of starting or stopping or while running. The faults in single-phase motors are due to many reasons like over or under currents, ove…
A transformer is a static device, that transfers electrical energy from one circuit to another without any physical connection. It works on the principle of magnetic induction, which induces emf in another circuit by means…
In the last article, we have seen about construction and working of a current transformer . A current transformer is a special-purpose transformer used to measure high currents in transmission and distribution systems. But …
