MR ETOS ED - Page 160

9 Visualization
Maschinenfabrik Reinhausen GmbH 2020160 6385142/08 ENETOS
®
ED
The following diagrams show an example of a graph of the fan speeds
based on the top-oil temperature according to the set parameters.
10
20
30
40
50
100
%
0 20 40 60 120 140°C
n
θ
60
70
80
80 100
0
Top oil
n
n
min
max
θ θ
S1 S2
S1
S2
Figure116: Fan speed based on the top-oil temperature
n Fan speed θ
Top-oil
Top-oil temperature
n
min
Minimum fan speed n
max
Maximum fan speed
θ
S1
Lower threshold for top-oil
temp.
θ
S2
Upper threshold for top-oil
temp.
Fan speed based on load factor
The load factor is the ratio of load current to nominal current. If the load fac-
tor is less than the lower threshold, then the device uses the minimum fan
speed. If the load factor is greater than the upper threshold, then the device
uses the maximum fan speed. If the load factor is between the lower thresh-
old and upper threshold, then the device calculates the necessary speed us-
ing a straight line between both points S1 and S2.