WEG CFW300 V1.3X, Programming Manual

Page: 120 / 157

Faults and Alarms
14-2 | CFW300
14
P037 - Motor Overload Ixt
Adjustable
Range:
0.0 to 100.0 %
Factory
Setting:
Properties: ro
Description:
It indicates the present motor overload percentage or overload intergrator level. When this parameter reaches
6.3 %, the inverter will indicate the motor overload alarm (A046). Or when this parameter reaches 100 %, the
"Motor Overload" fault (F072) will occur (F072).
Figure 14.1 on page 14-2 shows the actuation time of the overload as a function of the output current (P003)
normalized in relation to the overload current (P156, P157 or P158).
For example, for a constant ratio with 150 % of overload, Fault F072 occurs in 60 seconds. On the other hand,
for output current values below P156, P157 or P158 according to the output frequency, fault F0072 does not
occur. For ratio values above 150 %, the fault actuation time is below 60 s.
0 60 120 180 240 300
3
2.5
2
1.5
1
0.5
0
Ou
tp
ut
c
ur
ren
t /
O
ver
lo
ad
c
ur
ren
t
Region of overload
Time(s)
Figure 14.1: Actuation of the motor overload
NOTE!
In order to ensure greater protection in case of de-energization of the inverter, this function keeps
the information regarding the motor thermal image in a non-volatile memory area of the inverter.
Thus, after the inverter energization, the function will use the saved value of the thermal image to
execute a new overload assessment.