Harmonic Restraint Differential Relay for Transformer Protection: The operation of the relays because of magnetising inrush current can be avoided by using kick fuses across the relay coils or using…
Tuned Amplifier Articles: Tuned Amplifiers – Definition, Classification and Advantages: Amplifier amplifying a signal of specific frequency or narrowband of frequencies is known as tuned amplifier. Tuned amplifiers are mostly…
Transistor Biasing and Stabilization Articles: Selection of Operating Point in Transistor Biasing: To study the selection of operating point in Transistor biasing conditions on the performance of a transistor, it…
Sinusoidal Oscillators Articles: What is Oscillator? – Types of Oscillators: An oscillator is the basic element of all ac signal sources and generates sinusoidal signals of known frequency and amplitude.…
Feedback Amplifiers Articles: Voltage Amplifier – Definition and Equivalent Circuit: Voltage amplifiers are intended to amplify an input voltage signal and provide an output voltage signal. The voltage amplifiers is…
Loss of Excitation Protection in Generator: Loss of excitation protection in generator can endanger the generator or the connected system or both. It is caused by accidental tripping of field…
Percentage Differential Relay Protection of Generator: This system, also called the Merz-Price protection system, is the most common type of protection used for stator windings against phase-to-phase or phase-to-ground faults.…
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…