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…
Difference between Static Relays and Electromagnetic Relays: The conventional electromagnetic relays are robust and quite reliable, but are required to operate under different forces under fault conditions. This leads to…
Mho Type Distance Relay - Working and Characteristics: Mho relay is a high speed relay and is also known as admittance relay. It is also sometimes called an angle impedance…
Thermal Relay Construction and Working Principle: Thermal Relay can operate on the principle of thermal effect of electric current. It consists of bimetallic strips which are used in small sizes…
HVDC Circuit Breakers - Construction and Working Principle: Light duty dc circuit breakers have been in use since long. However, there is lack of suitable circuit breakers for HVDC systems.…
Factors to be Considered in Selection of Fuse: In order to ensure that the fuses will correctly and reliably protect any given section or element of an electrical circuit, selection…
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…
Effects of Short Circuit Faults on Power System: Depending upon power circuit voltage and configuration, method of neutral connection, presence of regulating devices and the speed of disconnection of the…