Omicron CP TD1 - Measuring Transformer Insulations (Two-Winding)

CP TD1 Reference Manual V 1.44
42
The correlation between the Dissipation Factor and Power Factor (PF = cos
ϕ)
and the vector diagram are shown in Figure 5-3.
Figure 5-3 Correlation between DF and PF
I
m
I
CN
I
CX
δ
U
O
R
e
Withδ 1
δδϕcos
δ
≅tan≅
«
π
2
--- ϕ–=
PF
DF
1 DF
2
+
------------------------=
DF
PF
1 PF
2
–
-----------------------=