Siemens 1FT6031-4AK71-4AH0-Z Manual page 192

Motor Components (Options)
4.1 Thermal motor protection
Caution
The integrated temperature sensor protects the synchronous against an overload condition
Shaft heights, 28 to 48 up to 2 ∙ I
from shaft height 63 up to 4∙ I
For load applications that are critical from a thermal perspective - e.g. overload when the
motor is stationary or an overload of 4 ∙ M
available. This is the reason that additional protection must be provided.
Figure 4-1
4-2
and speed <> 0
060 K
and speed <> 0
0 60 K
R [k Ω
Resistance characteristic of the KTY 84 as a function of the temperature
Configuration Manual, (PFT6), Edition 12.2004, 6SN1197-0AD12-0BP0
longer than 4 s, adequate protection is no longer
0
I
[
1FT6 synchronous motors