5 Installation and commissioning
70 BA5831400-00 EN
Setting curve
The resistance value to be set depends on the nominal secondary trans-
former current and the temperature gradient of the transformer and results
from the following setting curves:
1
2
3
gr
R
0
10
20
30
K
50
4.2 5.0 6.0 7.0 8.0 9.0 10.0
2.2A
2.1A
2.0A
1.9A
1.8A
1.7A
1.6A
1.5A
I
W
[K]
[Ω]
Figure53: Resistance setting curve
gr Temperature gradient R Resistance of the heating circuit
I
W
Nominal secondary transformer
current
Example:
Nominal secondary transformer current: 1.9A
Required gradient: 26K
Resistance value from setting curve: 8.6Ω