Instantaneous Overcurrent Relays: If the relay operates instantly without any intentional time delay, this characteristic can generally be satisfied by a relay of the non-polarized attracted armature type. This relay…
Derivation of Single Phase Quantity from Three Phase System: It will be seen later that auxiliary channels or pilot wires are used to transmit information from one end of the…
Methods of Discrimination in Power System Protection: Methods of Discrimination in Power System Protection are basically of two types: those which discriminate as to the location of fault, and those…
Clamping Circuit: Negative and Positive Voltage Clamping Circuits - A clamping circuit, also known as a dc restorer, changes the dc voltage level of a waveform, but does not affect…
Diode Series Clipper Circuit: The function of a Diode Series Clipper Circuit (or limiter) is to clip off an unwanted portion of a waveform. This is sometimes necessary to protect…
Waveguide Junctions: When it is required to combine two or more signals (or split a signal into two or more parts) in a waveguide system, some form of multiple junction…
Theory of Frequency Modulation and Phase Modulation: Frequency Modulation and Phase Modulation is a system in which the amplitude of the modulated carrier is kept constant, while its frequency and…
Define Suppression of Carrier: Three main systems are employed for the generation of SSB; the filter method, the phase cancellation method and the "third method." They differ from one another…