“B” Group: Fine-Tuning Functions
Configur
ing Dr
iv
e
P
a
ra
meters
3–34
Constant Torque Characteristic
– Select-
ing the constant torque characteristic for the
example motor gives the curves below. At
2.5 Hz, the output current is reduced by a
factor of 0.9 for given trip times.
Free Thermal Characteristic
- It is possible to set the electronic thermal characteristic using a
free-form curve defined by three data points, according to the table below.
The left graph below shows the region for possible free-setting curves. The right graph below
shows an example curve defined by three data points specified by B015 – B020.
Function
Code
Name
Description
Range
B015 / B017 /
B019
Free-setting electronic
thermal frequency 1, 2, 3
Data point coordinates for
Hz axis (horizontal) in the
free-form curve
0 to 400 (Hz);
model -4000HFx2 is
0.00 to 120.0 (Hz)
B016 / B018 /
B020
Free setting electronic
thermal current 1, 2, 3
Data point coordinates for
Ampere axis (vertical) in the
free-form curve
0.0 = (disable)
0.1 to 1000.
Trip current
reduction
factor
x 1.0
x 0.9
x 0.8
0
2.5
5
60
Hz
Trip
time (s)
Reduced trip current at 2.5 Hz
A
60
0.5
0
115.2
62.8 86.4
98.1% 135%
180%
Trip
time (s)
Reduced trip current at 2.5 Hz
A
60
0.5
0
1026
572
810
95.4% 135%
171%
SJ700-150LFE2;
rated current is 64A
SJ700-3150LFE2;
rated current is 600A
Output
current (A)
Setting range
max. freq.
B020
B018
B016
B015 B017 B019 Ax04
Trip current
reduction
factor
Output freq.
x 1.0
x 0.8
0
5
400
Hz
Hz
0
