Omicron CP CR500 - Page 33

33
Diagnostic of Rotating Machines Insulation
Step 7: Measurement of the dielectric response
(GSTgA+B mode)
Figure 6-14:
Measurement the
dielectric response
Step 8: Results
Figure 6-15:
Tan Delta = f (V)
Note: The results displayed in figures 6-15, 6-16 and 6-17 show curves of a
"good" generator isolation.
Tan Delta = f (V)
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
0.0V 2000.0V 4000.0V 6000.0V 8000.0V
%
R (L1/A)
S (L2/B)
T (L3/C)