
0 1
B
A
Fig. 36: The motor switch between the drive and the motor
A. The motor switch
B. Mains
P3.1.2.10 OVERVOLTAGE CONTROL (ID 607)
Use this parameter to set the overvoltage controller out of operation.
The function is necessary when
•
the supply voltage changes, for example, between -15% and +10%, and
•
the process you control does not have the tolerance for the changes that the
undervoltage controller and the overvoltage controller make to the output frequency of
the drive.
The overvoltage controller increases the output frequency of the drive
•
to keep the DC link voltage in the permitted limits, and
•
to make sure that the drive does not trip because of an overvoltage fault.
NOTE!
The drive can trip when the overvoltage and undervoltage controllers are disabled.
P3.1.2.11 UNDERVOLTAGE CONTROL (ID 608)
Use this parameter to set the undervoltage controller out of operation.
The function is necessary when
•
the supply voltage changes, for example, between -15% and +10%, and
•
the process you control does not have the tolerance for the changes that the
undervoltage controller and the overvoltage controller make to the output frequency of
the drive.
The undervoltage controller decreases the output frequency of the drive
PARAMETER DESCRIPTIONS
VACON · 221
LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/
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