WEG CFW08 Vector inverter User Manual page 80

[Factory Setting]
Parameter
P151
DC Link Voltage
Regulation Level
P156 0.2xPI
Motor Overload
Current
Range
Unit Description / Notes
325...410V The DC link voltage regulation (ramp holding) avoids overvoltage
(line 200-240V) trips (E01) during deceleration of high inertia loads and/or short
[ 380V ] deceleration times.
1V It acts in order to increase the deceleration time (according to load
- inertia), thus avoiding the E01 activation.
564...820V
(line 380-480V)
[ 780V ]
1V
Figure 6.12 - Deceleration curve with DC Link voltage limitation
By this function an optimized deceleration time (minimum) is
achieved for the driven load.
This function is useful in applications with medium inertia that require
short deceleration times.
In case of overvoltage trip during the decelearation, you must reduce
gradually the value of P151 or increase the time of the deceleration
ramp (P101 and/or P103).
The motor will not stop if the line is permanently with
overvoltage (U
or increase the value of P151.
If even with these settings the motor does not decelerate within the
required time, you will have the following alternatives
- use the dynamic braking (for more details, see Item 8.20);
- if inverter is being operated in V/F control, increase P136;
- if inverter is being operated in vector control, increase P178.
This function is used to protect the motor against overload
...1.3xPI
nom nom
(Ixt function - E05).
[ 1.2xP401 ]
0.01A (<10.0A); The motor overload current is the current level above which the in
verter will consider the motor operating under overload. The higher
0.1A (>9.99A)
the difference between the motor current and the overload current,
the sooner the Ixt function - E05 - will act.
DETAILED PARAMETER DESCRIPTION
DC Link
voltage
P151
rated Ud
Cl voltage
Ud (P004)
Output
Frequnecy
(Motor
speed)
(regulation)
>P151). In this case, reduce the line voltage,
d
NOTE!
When dynamic braking is used, set P151 to the maximum
value.
E01 - Overvoltage
CI limitation
Time
Time
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