How to test relay? Methods for testing electric relay A relay is defined as an electrically controlled device that opens and closes electrical contacts with the help of electromagnetic switching and performs ON and OFF operations of other devices in…
Transformers are said to be connected in parallel operation when their primary connected to a common supply and secondary connected to a common load. The function of the transformer is to deliver power to the locality, city. But in some cases, a…
The transformer is the main device of the power system and its reliability is more important. Hence protection must be provided to the transformer. Buchholz relay is used to provide protection to the transformer against fault that occurs inside the…
Reading Induction Motor Nameplate sometimes very difficult and challenging because the nameplates Often get dirty, painted, and rusted as they get old. So reading motor information becomes frustrating. You will need motor information for installation of VFD, starter design, power…
Electrostatic Precipitator also known as ESP is the leading and most effective technology used for removing solid dust particles from industrial flue gases. The electrostatic Precipitator consists of a large steel chamber and inside the chamber, an electrode system is…
Differential protection is used to protect the transformer and generator against internal fault but for larger generators, additional protection is provided called Restricted earth fault protection. also known as REF protection. When the neutral of the transformer or generator is…
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…
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…
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…
The type of motor that operates on both DC and single phase AC supply is called Universal Motor. The universal motor is also called an ac series motor. The universal motor works at approximately the same speed and output on…