Theory
11
Parallel equivalent diagram of a loss capacitance with vector
diagram
Loss factor (Dissipation Factor)
R
C
R
X
I
I
P
C
C
R
=
=
=
=
1
Q
tan
Power Factor
δ
tan 2
1
tan
cos
+
=
=
=
=
S
P
I
I
PF
R
Q
Reactive Powre
S
Apparent Power
P
Real Power
U
Test
applied test voltage
I
C
current through capacitance
I
R
current through resistance (insulating material)
I
I
C
+ I
R
C
ideal capacitance
R
ideal resistance
Because P = Q • tan
, the losses which are proportional to tan
, will usually be given as a value
of tan
to express the quality of an insulation material. Therefore the angle
is described as loss
angle and tan
as loss factor.
5.2
Parallel and Series Equivalent Circuits
The measuring bridge measures and displays both - the parallel and/or series equivalent circuit
values.
The following formulas describe the calculation of the value conversion parallel
– series :
Parallel equivalent circuit
Parallel Equivalent
Circuit C
p
-R
p
Rp
Cp
=
1
tan
*
*
* measured values
Summary of Contents for 2830
Page 1: ...2830 2831 Precision Liquid and Solid Dielectric Analyzer User Manual 4843477 M Version 3 0 ...
Page 7: ...Introduction VII 17 Conformity 113 18 Notes 114 ...
Page 8: ...VIII Introduction ...
Page 121: ...Conformity 113 17 Conformity ...
Page 122: ...114 Notes 18 Notes ...
Page 123: ...Notes 115 ...