Pulse Modulation: Pulse modulation may be used to transmit analog information, such as continuous speech or data. It is a system in which continuous waveforms are sampled at regular intervals. Information regarding the signal is…
Pulse Code Modulation(PCM): Pulse Code Modulation(PCM) is different from the other forms of pulse modulation studied so far, PCM also uses sampling techniques, but it differs from the others in that it is a digital…
Pulse Characteristics and Terminology: For describing the output of pulse generators and the applications in which they are used, the introduction of terminology associated with the pulses is very important. The first group of such…
Pulse and Square Wave Generator Block Diagram (Laboratory Type): Pulse and Square Wave Generator are used as measuring devices in combination with a CRO. They provide both quantitative and qualitative information of the system under…
Pulse Amplitude Modulation(PAM): Pulse Amplitude Modulation(PAM) is the simplest form of Pulse Modulation. It is shown in Fig. 18.7. PAM is a pulse modulation system in which the signal is sampled at regular intervals, with…
Protective Relays Interview Questions and Answers: 1. What is a protective relay ? Ans. Protective relay is an electrical device designed to initiate isolation of a part of an electrical installation, or to operate an…
Protective Relay: A Protective Relay is a device that detects the fault and initiates the operation of the circuit breaker to isolate the defective element from the rest of the system. The Protective Relay detect…
Protective Devices and Interlocks: Protective devices must be incorporated in the control circuit (or circuits) to interrupt the flow of current to the motor to guard against overloads or other conditions dangerous to the motor…
Protection of Transformers: Transformers are static devices, totally enclosed and generally oil immersed. Therefore, chances of faults occurring on them are very rare. However, the consequences of even a rare fault may be very serious…
Protection of Feeders and Transmission Lines Interview Questions and Answers: 1. What is unit type protection ? Ans. Unit system of protection is one in which the protection responds to faults in the protected zone…