Electrical Engineering ⇒ Topic : Components of admittance

Seema
 
Components of admittance. Depending upon the nature of reactance, the impedance of an a.c. circuit can be expressed in the complex form as Z = R + j X_{L} or Z =R  jX_{c} Here, R is the resistive or inphase component of Z while X_{L} or X_{c }is the reactive or quadrature component of Z. Let us find the components of Y. We shall discuss two cases by way of illustration. (1) R and L in parallel. Fig. a (i) shows the circuit. Here V is the applied voltage and Z is total circuit impedance.
figure (a) Fig. a (ii) shows the components G and B_{L} of Y. Here, G is the inphase component of Y while B_{L}, is the quadrature component of Y. Note that G (conductance) is positive and B_{L} (inductive susceptance) is negative. (ii) R and C in parallel. Fig. a (i) shows the circuit. Here V is the applied voltage and Z is total circuit impedance. figure (a) Fig. a (ii) shows the components G and B_{c} of Y. Here, G is the inphase component of Y while B_{c} is the quadrature component of Y. Note that G (conductance) is positive and B_{c} (capacitive susceptance) is also positive Note. Conductance G is always positive. However, B_{L} (inductive susceptance) is negative while B_{c}, (capacitive susceptance) is positive. Moreover, it is a usual practice to omit the suffix L or C with susceptance B. The positive sign with B indicates capacitive susceptance and the negative sign with B implies inductive susceptance  
 
!! OOPS Login [Click here] is required for more results / answer