Motor Electronic Overload Protection - WEG SSW-07 Manual Del Usuario

4.8 MOTOR
ELECTRONIC
OVERLOAD
PROTECTION
Figure 4.7 - Motor current setting
The motor electronic overload protection simulates the heating and
cooling of the motor, also known as thermal image. This simulation
uses as input data the True rms current. The curve with the working
time in motor overload is defined in figure 4.8.
Time t(s)
10000
1000
100
10
1
S.F.=1 1x 2x 3x 4x
S.F.=1,15 1x 2x 3x 4x 5x 6x 7x 8x 9x 10x
Figure 4.8 - Thermal classes of motor protection in cold condition
Chapter 4 - SettING the SSW-07
Motor Current
Setting Trimpot
5x 6x 7x 8x 9x
Class 30
Class 25
Class 20
Class 15
Class 10
Class 5
x In motor
current
31