Current Graded Overcurrent Protection: An alternative to time grading or in addition to time grading, current graded overcurrent protection can be applied when the impedance between two substations is sufficient. It is based on the…
Zero Crossing Detector Circuit: Zero Crossing Detector Circuit basically involves the sine to square wave conversion by a level detector circuit followed by a pulse circuit, which consists of one shot monostable circuit or a…
Difference Between Thyristor and Transistor: As already mentioned, transistors and thyristors are both semiconductor devices. They are now widely employed in switching operations because of their numerous advantages such as noiseless operation owing to absence…
Pin diagram of 80287 co-processor: The pin diagram of 80287 co-processor is shown in Fig. 7.53 and the function of pins are given below: D15-D0 The D15-D0 is used as a 16-bit data bus which…
Voltage Controlled Current Source (VCCS) Circuit: An ideal form of a current source, whose output current Iout is controlled by an input voltage is shown in Fig. 36.35. Here, the output current Iout is dependent on…
Energy Efficient Operation of Drives: In many Energy Efficient Operation of Drives applications involving constant speed operation, induction motors operate under no load or light load for prolonged periods, such as in pressing machine, conveyors,…
Quantitative Theory of PN Junction Diode: Quantitative Theory of PN Junction Diode - Here an expression for the total current will be derived as a function of the applied voltage with the assumption that depletion…
Generation of Impulse Current Generator Output Waveform: Lightning discharges involve both high voltage impulses and high current impulses on transmission lines. Protective gear like surge diverters have to discharge the lightning currents without damage. Therefore,…
Dynamical Equations of Electromechanical Systems: Dynamical Equations of Electromechanical Systems - Figure 4.19 shows an electromagnetic relay whose armature is loaded with spring K, damper B, mass M and a force generator F. Figure 4.20…
Difference between Pentium 3 and Pentium 4 Processors: The difference between Pentium 3 and Pentium 4 Processors is given in table below Pentium III Processor Pentium IV Processor Pentium III processor is a sixth-generation processor…