WEG CFW500 V1.8X, Руководство по программированию, Страница: 148 / 172

Fault and Alarms
15-2 | CFW500
15
It is recommended that parameter P0156 (motor overload current at rated speed) be set at a value 10 % above
the used motor rated current (P0401).
In order to deactivate the motor overload function just set parameters P0156 to P0158 to values equal to or
above two times the inverter rated current P0295.
Figure 15.1 on page 15-3 shows the overload actuation time considering the normalized output current in
relation to the overload current (P0156, P0157 or P0158), that is, for a constant output current with 150 % of
overload, fault F0072 occurs in 60 seconds. On the other hand, for output current values below P0156, P0157
or P0158, according to the output frequency, fault F0072 does not occur. Whereas for values above 150 % of
P0156, P0157 or P0158 the fault actuation time is below 60 s.
P0349 – Level for Alarm Ixt
Adjustable
Range:
70 to 100 % Factory
Setting:
85 %
Properties:
cfg
Access Groups
via HMI:
Description:
This parameter defines the level for alarm actuation of the motor overload protection (A0046 when P0037 > P0349).
The parameter is expressed in percentage of the overload integrator limit value, where fault F0072 occurs. Therefore,
by setting P0349 at 100 %, the overload alarm is inactive.
P0037 – Motor Overload Ixt
Adjustable
Range:
0 to 100 % Factory
Setting:
Properties:
ro
Access Groups
via HMI:
READ
Description:
This parameter indicates the present motor overload percentage or overload integrator level. When this
parameter reaches the P0349 value the inverter will indicate the motor overload alarm (A0046). As soon as the
value of the parameter is at 100 %, a motor overload fault (F0072) is raised.