Phase sequence and Polarity of Three Phase System
Phase sequence is the sequence in which the voltages in a three-phase system reach their peaks. Each phase-shifted by 120 degrees with respect to the other two.
Circuit Theory
Phasor and Complex Representation of Three Phase Supply
Three sinusoidal voltages with equal amplitude and frequency, but a phase difference of 120∘ (or 2π/3 radians) between them, constitute a three-phase supply. Common names for them include Phase R, Phase Y, and Phase B. For such a supply, the general form is as follows: Graphical Representation Phasor representation is a way of representing sinusoidal … Read more
AC Series Circuit Formulas
For RL and RC Series Circuit: For RL Series Circuit For RC Series Circuit V= rms value of the applied voltageI= rms value of the circuit currentVR= Voltage across resistanceVL= Voltage across inductanceVC= Voltage across capacitanceR= ResistanceXL= Inductive ReactanceXC= Capacitive Reactance For RL: For RC : Z= ImpedanceR= ResistanceXL= Inductive ReactanceXC= Capacitive Reactance For RL: … Read more
Basic AC Circuit Formulas
Basics: v = value of alternating voltage at time t (called instantaneous value)Vm = maximum value of alternating voltage= Angular velocity of the coil i =value of alternating current at time t (called instantaneous value)Im = maximum value of alternating current = Angular velocity of the coil T = Time period in secondf = frequency … Read more