SVF-G7 Series Frequency Inverter Operation Manual
Chapter 6 Functional Parameter Detail
162
and comparing with the over-voltage stall point defined by Fb.03 (relative
to standard busbar voltage), if it exceeds over-voltage stall point, the
output frequency of frequency inverter will stop falling, and will continue
to slow down again until the detecting busbar voltage is below over-voltage
stall point.
Fb.04
Fb.04
Fb.04
Fb.04
rapid
rapid
rapid
rapid
current-limiting
current-limiting
current-limiting
current-limiting
standard
standard
standard
standard
Default
Default
Default
Default::::
170%
170%
170%
170%
setting
setting
setting
setting range
range
range
range:::: 100
100
100
100
~
200%
200%
200%
200%
Fb.05
Fb.05
Fb.05
Fb.05
Frequency
Frequency
Frequency
Frequency decrease
decrease
decrease
decrease rate
rate
rate
rate in
in
in
in
current
current
current
current limiting
limiting
limiting
limiting
Default
Default
Default
Default::::
0.00Hz/s
0.00Hz/s
0.00Hz/s
0.00Hz/s
setting
setting
setting
setting range
range
range
range:::: 0.00
0.00
0.00
0.00
~
50.00Hz/s
50.00Hz/s
50.00Hz/s
50.00Hz/s
When the frequency inverter is running, but overload and motor actual speed
rise lees than the raise rate of frequency, if we don’t take measures, it
will cause the frequency inverter trip caused by accelerated over-current
fault.
The protect function of over-current and loss speed could compare with Fb.04
rapid current-limiting standard through checking current, when the
frequency inverter is running. If the limit-current point is exceeded,
output frequency of the frequency inverter will act Fb.05 order. And when
the output current is lower than the limit-current standard, it will recover
normal operation. As show figure 6-20
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