A three-phase AC induction motor is a constant-speed motor as a DC shunt motor. But the speed of the DC shunt motor can be changed smoothly simply using rheostats. This maintains the speed regulation and efficiency of the DC shunt…
In the Delta connection, the dissimilar terminals of three phase windings are connected together. The finishing end of one phase is joined to the starting end of the other phase to obtain mesh or delta-connected winding. Delta connection in the…
WHAT IS AN ELECTRICAL LOAD? An electrical load on a power system is any electrical appliance that consumes electrical energy and converts it into heat or in other forms. Different electrical devices use electrical power to convert it into another…
Double Revolving Field Theory The double field revolving theory of single phase induction motor is proposed to explain this problem of no torque developed at starting and yet torque once rotated. Double revolving field theory is based on the fact…
The permanent magnet moving coil instruments (PMMC instruments) are suitable for DC quantity measurements only. PMMC instruments working principle based on Faraday’s law of electromagnetic induction states that when the current carrying coil is placed in the magnetic field it experiences…
Classification of power system Buses In the power system, every bus is associated with four different quantities, real power, reactive power, bus voltage, and phase angle. In load flow, two parameters out of the four are specified and the remaining two…
A fuse is a small wire connected between two terminals that are mounted on an Insulating base and connected in series with a circuit. A fuse is the simplest and cheapest current interrupting device used to protect equipment from overload…
Types of insulators are used in an overhead transmission and distribution line to provide insulation to power conductors from the ground and tower or supporting structure. like Pin type of insulators, Suspension, and Strain type insulators. There are 5 types of insulators…
A star delta starter is a type of motor starter that is used to control the starting and stopping of three-phase induction motors. It is commonly used in industrial applications where motors of large power ratings are used. Here is…
Due to the desirable Torque-speed characteristics, the series motor is exclusively used in traction applications. Dc series motor satisfy all requirements for this kind of work and services but the transmission of ac power is more economical than DC. This…