Directional Overcurrent Protection Principle: For the main bus-bars in the power stations, due to their importance in the operating conditions, it is required that the disconnection be without any delay…
Electrical Power Engineering Articles: This Electrical Power Engineering Articles which includes the following topics: Â Refrigeration Cycle Diagram Explain Vapour Compression Refrigeration System Explain Vapour Absorption Refrigeration System Thermoelectric Refrigeration…
Static Differential Relay Block Diagram and Working Principle: The differential relay measures the phasor difference between two similar electrical quantities (voltage-voltage or current-current). The rectifier bridge amplitude comparator is the…
Directional Static Overcurrent Relay: For obvious reasons of obtaining selectivity overcurrent relays are made directional. Directional static overcurrent relay senses direction of power flow by means of phase angle between…
Negative Phase Sequence Relay: A negative phase sequence relay (or phase unbalance) is essentially provided for the protection of generators and motors against unbalanced loading that may arise due to…
Overlapping Zones of Protection: Overlapping Zones of Protection - In order to provide selectivity to the system it is usual practice to divide the entire system into several protection zones.…
Basic Requirements of Protection System: Protection system is an extremely important part of the power system as it is provided to operate under abnormal conditions to prevent failure or isolate…
Why we need for Power System Protection? Need for power system protection are growing fast with more generators, transformers and large network in the systems. For system operation a high…