Three Winding Transformer: Three Winding Transformer may be built with a third winding, called the tertiary, in addition to the primary and secondary. Various purposes which dictate the use of a tertiary winding are enumerated…
Short Circuit Current of Loaded Synchronous Machine: In the previous article on the Short Circuit of a Synchronous Machine, it was assumed that the machine was operating at no load prior to the occurrence of…
Microprocessor Control of Synchronous Motor Drives: Variable speed drives employing Microprocessor Control of Synchronous Motor Drives are becoming very popuÂlar in industrial applications. They are an immediate solution for high power reversible drives and are…
Difference between PCM, Adaptive Delta Modulation and Differential Pulse Code Modulation: The difference between PCM, Adaptive Delta Modulation and Differential Pulse Code Modulation is given in table below Sl no Parameter PCM Delta modulation (DM)…
Integrated Injection Logic (IIL or I2L) Circuit: It is the latest entry into the bipolar saturated logic field. It uses no biasing and loading resistors at all. Resistors require lot of power and space on…
Hall Effect Relay Circuit: Hall Effect Relay Circuit is utilized to give a phase comparator. The effect is very predominant in certain semiconductors such as indium arsenide, indium antimonide, indium phosphate, etc. Figure (9.5) illustrates…
Network Terminology: In this Network Terminology, we shall define some of the basic terms which are commonly associated with a network. 1.Network Any arrangement of the various electrical energy sources along with the different circuit…
Transient Response of RLC Circuit: Consider a Transient Response of RLC Circuit consisting of resistance, inductance and capacitance as shown in Fig. 12.11. The capacitor and inductor are initially uncharged, and are in series with…
Scheme of Distance Protection: In developing an overall Scheme of Distance Protection, it is necessary to provide a number of relays to obtain the required discrimination. Modern practice is to adopt definite distance method of…
Negative Phase Sequence Relay: A negative phase sequence relay (or phase unbalance) is essentially provided for the protection of generators and motors against unbalanced loading that may arise due to phase-to-phase faults. Essentially such a…
