Frequency Limits - Danfoss Vacon NXP Applications Manual

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5.6.3

Frequency limits

NOTE: This functionality is not Grid Code functionality even if functionality may be similar.
2.6.3.1 Line Low Frequency Trip Limit
If the drive output frequency goes below this level, the drive will trip to a line synch fault.
Use this limit as a final and immediate protection function for the grid or generator. In
the protection group there are protection functions that will use OPT-D7 information.
The common tripping limit of the land based grid code standard is 47.5 Hz within 200 ms.
2.6.3.2 Line High Frequency Trip Limit
If the drive output frequency goes above this level, the drive will trip to a line synch fault.
Use this limit as a final and immediate protection function for the grid or generator. In
the protection group there are protection functions that will use OPT-D7 information.
The common tripping limit of the land based grid code standard is 50.2-51.5 Hz within
200 ms.
5
P RegenLineHTripL
P Supply Frequency
P RegenLineLTripL
Description of parameters
Limit Setting: Frequency
Fault: F10 Line Synch Fail
Figure 32.
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