Danfoss iC2 Application Manual page 110

Application Guide | iC2-Micro Frequency Converters
Selection number Selection name
0 Disabled
1 Enabled (not at stop)
2 Enable
P 2.3.2 Overvoltage Controller Kp
This parameter enables to fine-tune the overvoltage gain for P 2.3.1 Overvoltage Control. It is not necessary to change this parameter for
normal applications.
Default value:
100
Parameter
219
number:
Data type:
uint16
P 2.3.6 Power Loss Action
Select the action of frequency converter when the mains voltage drops below the limit set in P 2.3.7 Power Loss Controller Limit.
Default value:
0 [No function]
Parameter
1410
number:
Data type:
enum
This parameter is typically used where short mains interruptions (voltage dips) are present. At 100% load and a short voltage
interruption, the DC voltage on the main capacitors drops quickly. For larger frequency converters, it only takes a few milliseconds before
the DC level is down to about 373 V DC and the IGBTs cut off and lose control of the motor. When mains is restored, and the IGBTs start
again, the output frequency and voltage vector do not correspond to the speed/frequency of the motor, and the result is normally an
overvoltage or overcurrent, mostly resulting in a trip lock. P 2.3.6 Power Loss Action can be programmed to avoid this situation. Select
the function to which the frequency converter must act when the threshold in P 2.3.6 Power Loss Action at mains fault has been reached.
The following are the selections for the parameter.
110
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Selection description
No OVC required.
Activate OVC except when using a stop signal to stop the
frequency converter.
Activate OVC.
PERSONAL INJURY AND EQUIPMENT DAMAGE
Enabling OVC in hoisting applications may lead to
personal injuries and equipment damage.
DO NOT enable OVC in hoisting applications.
l
Parameter type:
Unit:
Access type:
Parameter type:
Unit:
Access type:
CAUTION
Range (0–1000)
%
Read/Write
Selection
–
Read/Write
AB413939445838en-000301 / 130R1254