1-Phase Circuits

Components of Admittance. ( Simple Explanation)

Components of Admittance.
A component of admittance inphase with the applied voltage is called conductance. Or the X component of admittance is called conductance. It’s represented by G and the unit of conductance is Mho or Siemens.
G = Y Cos φ = (1/Z) * (R/Z) = R/Z2 = R/ (R2 + X2)
(Since Cos φ = R/Z and Y = 1/Z)
And Total Conductance GT = G1 +G2 +G3+…..
That component of admittance, which has an angle of 90 degree with applied voltage is called suserptance. ..or Y component of admittance is celled susceptnce, its represented by B. and the unit of susceptance is also Mho or Siemens.
A Component of admittance in quadrature ( at 90 degree) with the applied Voltage is called susceptance.
B = Y Sin Φ = 1/Z * X/Z = X/Z2 = X/ (R2 + X2) ——–> (Since Sine Φ  = X/Z)
And total Susceptance = BT = B1 + B2 + B3 +…Bn
Also Note that inductive suseptance of a circuit is negative (-), while Capacitive Susceptance of a circuit is always positive (+).
Y = G – j BL …… (In case of inductive Circuit)
Y = G + BC ……. (In case of capacitive circuit)
For More explanation, consider the following circuit, (fig 1)
The Total conductance = algebraic sum of the conductance in each branch.
The Total conductance =GT= G1 +G2 +G3
Total susceptance = algebraic sum of the susceptance in each branch,
Total susceptance BT = (-B1) + (-B2) + (B3).
And total circuit admittance,
YT = √ (GT2 + BT2)
In case of inductive Circuit YT = √ (G2 + BL2) and Phase angle φ tan-1 (-BL/G)
In Case of Capacitive Circuit YT = √ (G2 + BL2) and phase angle φ tan-1 (Bc /G)
And Total current, I = VY,
And Power factor = Cos φ = G/Y.
You may also read: What is the Admittance and how is calculate it ?

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button

Kindly permit ads on our free website.

It appears that you are using an ad blocker. We rely on advertising to support our website, provide free information, and sustain our services. Kindly consider whitelisting our website to allow ads.