Microtest 6630 - Impedance (Z) and Admittance (Y)

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◆ Impedance (Z) and Admittance (Y)
The impedance covers oppositions in AC circuits in-
cluding resistance, inductance, and capacitance and is measured in units of
Ohm (Ω).
In electrical engineering, admittance covers both conductance and suscep-
tance and is the reciprocal of impedance. It is measured in units of Siemens
(S).
⚫ Impedance (Z):
Relevant Equations：
( )
( )




sin
cos
1
22
22
ZX
ZR
XR
RX
Z
XRZ
C
j
RLjRjXRZ
YI
E
Z
s
s
p
s
s
=
=
+
=
+=
−=+=+=
==
⚫ Admittance (Y):
Relevant Equations：
( )
( )


sin
sin
1
22
22
YB
BGY
BG
GB
Y
Y
X
B
p
p
s
=
+=
+
=
==