Power Swings in Power System Protection: The impedance measured or seen by a distance relay during normal load is shown in Fig. (5.29). Normally this would be outside the tripping…
Differential Relay Application: The principle of operation depends on a simple circulating current principle where the difference of the currents of the two CTs flows through the relay under normal…
Important Questions of Protection of Alternators and Transformers: 1. Discuss the important faults on an alternator. 2. Explain with a neat diagram the application of Merz-Price circulating current principle for…
Important Questions of Unsymmetrical Fault: 1. What is a 3-Φ unsymmetrical fault ? Discuss the different types of unsymmetrical faults that can occur on a 3-Φ system. 2. Discuss the…
Symmetrical Fault Articles: Location of Reactors in Power System : Short circuit current limiting Location of Reactors in Power System may be connected in series with each generator in series…
Protection of Busbars and Lines Articles: Busbar Protection : Busbars and lines are important elements of electric power system and require the immediate attention of protection engineers for safeguards against…
Protection of Alternators and Transformers Articles: Balanced Earth Fault Protection : In small-size alternators, the neutral ends of the three-phase windings are often connected internally to a single terminal. Therefore,…
High Voltage Test on Transformer: High Voltage Test on Transformer are very important and costly apparatus in power systems. Great care has to be exercised to see that the transformers…