INVT Goodrive20-UL VFD Series Operation Manual page 48

Goodrive20-UL Series VFD
Function
Name
code
Magnetic
saturation
coefficient
P02.13
3 for the
iron core of
AM1
Magnetic
saturation
coefficient
P02.14
4 for the
iron core of
AM1
Motor
overload
P02.26
protection
selection
Motor
overload
P02.27
protection
coefficient
Description
0.0–100.0%
0.0–100.0%
0: No protection
1: Common motor (with low speed
compensation). Because the heat-releasing
effect of the common motors will be weakened,
the corresponding electric heat protection will
be adjusted properly. The low speed
compensation characteristic mentioned here
means reducing the threshold of the overload
protection of the motor whose running
frequency is below 30Hz.
2: Frequency conversion motor (without low
speed compensation). Because the
heat-releasing of the specific motors won't be
impacted by the rotation speed, it is not
necessary to adjust the protection value during
low-speed running.
Times of motor overload M = Iout/(In x K)
In is the rated current of the motor, Iout is the
output current of the VFD and K is the motor
protection coefficient.
So, the bigger the value of K is, the smaller the
value of M is. When M=116%, protection is
performed after motor overload lasts for 1 hour;
when M=150%, protection is performed after
motor overload lasts for 12 minutes; when
M=180%, protection is performed after motor
-43-
Function parameters
Default Modify
◎
57.0%
◎
40.0%
◎
2
○
100.0%