Circuit Breaker Rating: The ratings of a circuit breaker refer to the characteristic values that define the working conditions for which the circuit breaker is designed and built. Circuit breakers…
Basic Elements of Static Relay: The basic elements of a static relay are namely, Input Element: Mixing circuits are needed to sum the input signals in a convenient form. Semiconductor…
Coincidence Type Phase Comparator: The basic concept of phase comparison is simpler in that it is possible to deal with signals of equal strength whose coincidence (or noncoinecidence) is readily…
Square Wave Generators: Diode clippers can be used to remove the curved portion of the sinusoidal wave to give square waves. The operational amplifier together with an integrator, can be…
Types of Auto Reclosing: Types of Auto Reclosing can be broadly classified in two categories: Medium voltage auto-reclose where continuity of supply is the principal aim. High voltage auto-reclose where…
Auto Reclosing Scheme: Auto Reclosing Scheme - It is well realized that the transient faults which are most frequent in occurrence do no permanent damage to the system as they…
Motor Protection: Motor Protection - There is a wide range of motors in existence for various purposes. However, the fundamental problems affecting the choice of protection are independent of the…
Inrush Currents in Transformer: Magnetizing Inrush Currents in Transformer contain pronounced harmonics but the current during internal fault conditions is sinusoidal. Advantage is taken of this fact in the design…