WARRANTY SSW-05 Plus - Dimotec
WARRANTY SSW-05 Plus - Dimotec
WARRANTY SSW-05 Plus - Dimotec
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ENGLISH<br />
15. OVERLOAD PROTECTION:<br />
15.1. Motor Electronic Overload Protection:<br />
The motor electronic overload protection simulates the motor heating (Thermal Image). This heating simulation uses<br />
as input data the True RMS current. Fig. 15.1 shows the curve of the actuation time with motor under overload<br />
condition. The temperature class of this function is, according to the IEC 947-4-2, Class 10.<br />
t(s)<br />
1 + 10 4<br />
1 + 10 3<br />
100<br />
Cold Condition<br />
Hot Condition<br />
10<br />
1<br />
% Ief<br />
100 200 300 400 500 600 700 800<br />
Figure 15.1 - Curve of the motor electronic overload protection.<br />
Notes:<br />
1) When <strong>SSW</strong>-<strong>05</strong> <strong>Plus</strong> electronics (A1 and A2) is without power control supply voltage, the thermal image<br />
is saved internally. When the power supply voltage is re-established again (A1 and A2), the value of the<br />
thermal image returns to the value present before the loss of the power control supply.<br />
2) When the electronic overload protection is disabled via dip-switch, the thermal image is reset;<br />
3) The reset of the electronic overload protection can be set to manual function (man). In this case the<br />
reset must be made via digital input 2 (DI2) or by means of the reset button. If the reset setting has been<br />
set to automatic (auto), the error condition will be reset automatically after the cooling of the equipment.<br />
t(s)<br />
1 + 10 3<br />
100<br />
Cold Condition<br />
10<br />
Hot Condition<br />
1<br />
0.1<br />
% In<br />
100 200 300 400 500 600 700 800<br />
Figure 15.2 - Curve of the thyristor overload.<br />
Note:<br />
When the motor is running in full voltage, the cooling of the thyristor overload Thermal Image happens.<br />
This is because of the By-pass of the thyristors.<br />
English-12