ssw03_plus_series
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6<br />
DETAILED PARAMETER DESCRIPTION<br />
The cooling time of the thermal image depends on the<br />
motor power, i. e., for each power, a different cooling<br />
time is considered. If a different cooling time is required,<br />
this setting can be made at P27.<br />
The estimated value for the motor temperature is saved<br />
in non-volatile memory always the control board is<br />
switched off. Thus, always the control board is switched<br />
on, the last saved value will be returned.<br />
10000<br />
t (s)<br />
1000<br />
100<br />
10<br />
Class 30<br />
Class 25<br />
Class 20<br />
Class 15<br />
Class 10<br />
Class 5<br />
1<br />
0 1 2 3 4 5 6 7 8<br />
x In<br />
Figure 6.10 - Thermal Classes for Cold Motor Protection<br />
If a Service Factor different from 1.00 is used, the nominal<br />
current for the chart (figure 6.10) has to be<br />
corrected by the S.F. For example: a motor of In=100A<br />
and S.F.=1.15 has 1 x In=115A.<br />
86<br />
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