• pugazh anand

MemberAug 25, 2013

Can any one define susceptance?

I have seen in wiki susceptance is the imaginary of admittance. but its not a clear definition for suscep.
The reactance is the opposition of change of voltage and current through a element, such that how to difine susceptance?
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Replies
• MemberAug 25, 2013

While reactance is the measure of how much a circuit reacts against change in current over time, susceptance is the measure of how much a circuit is susceptible to conducting a changing current. susceptance is the reciprocal of reactance, thats it, susceptance= 1/reactance. Is it clear now??
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• MemberAug 26, 2013

lovejeet
While reactance is the measure of how much a circuit reacts against change in current over time, susceptance is the measure of how much a circuit is susceptible to conducting a changing current. susceptance is the reciprocal of reactance, thats it, susceptance= 1/reactance. Is it clear now??
okay you are saying reactance is reciprocal of susceptance. but the relation between them is [B(suscep)=-X(react)/|z|2(imp)] than how can you say it is reciprocal. am i clear my point?
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• MemberAug 26, 2013

Well the Magnitude of B may be equal to X/Z^2 But but the actual relation

How where did that expression come From? the Inverse of Impedance relation right Then Magnitude wise this relation is good.
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• MemberAug 26, 2013

@#-Link-Snipped-# -susceptance is acutally the imaginary part of Admittance. can you please derive that expression you mentioned, so that it would be more clear in its perspect.
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• MemberAug 26, 2013

Reactance and susceptance depend on the frequency, for dc the frequency is 0. that's why no reactance. Even your circuit include L and C, it has no reactance in DC.
capacitor reactance Xc=1/(2 pi *f* c);
capacitor susceptance Bc = 1/Xc;
Inductor reactance XL=2 pi f L;
inductor susceptance BL = 1/XL;

But in AC, it may combine all together and from complex number. Resistance (conductance) provide real parts and capacitor or inductor reactance (susceptance) provide imaginary parts. look like

Z(impedance)= R(resistance) + jX(reactance)