Power Electronics SD 300 Series, Getting Started Manual

Page: 140 / 354

SD300 POWER ELECTRONICS
138
DESCRIPTION OF PROGRAMMING PARAMETERS
Screen Description Default
value
Range Function
Set
on
RUN
Ad.74
Enable
regeneration
prevention
N
N
S
Enable regeneration prevention. When this
situation occurs, the drive will increase the
output frequency to prevent a fault due to
overvoltage in the DC link. With this
parameter, the drive helps the dynamic brake
unit to avoid regeneration situations when the
drive operates at normal speed.
NO
Ad.75
Regeneration
prevention
level
700V
300 to
800V
Set the voltage level in the DC link voltage at
which the algorithm will start increasing the
speed.
Figure Regeneration prevention level
illustrates this function.
Note: The default value and parameter range
will vary depending on the drive supply
voltage:
220V
➔
300 to 400V
380V ➔ 600 to 800V
NO
NO
Ad.76
[16]
Compare
frequency limit
1.00Hz 0.00 to
10.00Hz
Set the alternative frequency width to be
used by the algorithm when the voltage level
set in parameter Ad.75 is overcome during
regeneration prevention.
NO
Ad.77
[16]
P gain
regeneration
prevention
50.0%
0.0 to
100.0%
To prevent regeneration zone, set P/I gain in
the DC link voltage suppress PI controller.
Note: Press regeneration prevention does
not operate during accelerations or
decelerations; it only operates during
constant speed motor operation. When
regeneration prevention is activated, output
frequency may change within the range set
at Ad.76.
YES
Ad.78
[16]
I gain
regeneration
prevention
50.0ms
0.0 to
3000.0m
s
YES
[16] Displayed when Ad.74 is set to 1 (YES).