Configuration Manual AC Induction Motors 1PH4 - Siemens ...
Configuration Manual AC Induction Motors 1PH4 - Siemens ...
Configuration Manual AC Induction Motors 1PH4 - Siemens ...
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Motor Components<br />
3.1 Thermal motor protection<br />
!<br />
3-58<br />
Warning<br />
The integrated temperature sensor protects the motors against overload<br />
conditions up to 4 � I0 60K and speed 0.<br />
Sufficient protection is no longer provided for thermally critical load situations, e.g.<br />
for a high overload condition at motor standstill. In this case, other protective<br />
measures must be provided, e.g. a thermal overcurrent relay.<br />
If they exist, reduced data for standstill are specified.<br />
R [kΩ]<br />
3<br />
2<br />
1<br />
0<br />
0<br />
100<br />
I D = 2 mA<br />
200 300<br />
� U [°C]<br />
Fig. 3-1 Resistance characteristic as a function of the KTY 84 thermistor temperature<br />
© <strong>Siemens</strong> AG 2003 – 2006 All rights reserved<br />
<strong>AC</strong> <strong>Induction</strong> <strong>Motors</strong>, <strong>1PH4</strong> (APH4) – 04.06 Edition
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