INVT Goodrive 310-UL Series Operation Manual page 61

GD310-UL series VFD
Function
Name
code
Back EMF
P02.23 constant of
SM 1
P02.24 Reserved
Reserved
P02.25
Motor 1
overload
P02.26
protection
Motor 1
P02.27 overload
protection
When P00.15=2, the set value of P02.23 cannot be
updated by autotuning, please count according to the
following method.
The counter-electromotive force constant can be
counted according to the parameters on the name
plate of the motor. There are three ways to count:
1. If the name
counter-electromotive force constant Ke, then:
*2π)/ 60
E=(Ke*n
N
2. If the name
counter-electromotive
E'(V/1000r/min), then:
E=E'*n
/1000
N
3. If the name plate does not designate the above
parameters, then:
E=P/√3*I
In the above formulas: n
P is the rated power and I is the rated current.
Setting range: 0–10000
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: Variable frequency motor (without low speed
compensation) Because the heat-releasing effect 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*K)
In is the rated current of the motor, Iout is the output
current of the VFD and K is the motor protection
Description
plate designate
plate designate
force
is the rated rotation speed,
N
-53-
Function parameter
Default
value
the
the 300
constant
2
100.0%
Modify
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