3-87 Check Valve Ramp End Speed [Hz]
Range: Function:
0 [Hz]* [0 – Motor Speed Low Limit [Hz]] Set the speed in [Hz] below Motor Speed Low Limit where the Check Valve Ramp will no longer be
active.
3-88 Final Ramp Time
Range: Function:
0 [s]* [0 – 60 [s]] Enter the Final Ramp Time to be used when ramping down from Motor Speed Low Limit, par. 4-11
or 4-12, to zero speed.
Submersible deep well pumps can be damaged by running below minimum speed. A fast ramp time
below minimum pump speed is recommended. This parameter may be applied as a fast ramp rate
from Motor Speed Low Limit to zero speed.
6.3.5 4-** Limits and Warnings
Parameter group for configuring limits and warnings.
4-11 Motor Speed Low Limit [RPM]
Range: Function:
Application
dependent*
[Application dependant] Enter the minimum limit for motor speed. The Motor Speed Low Limit can be set to correspond to
the manufacturer’s recommended minimum motor speed. The Motor Speed Low Limit must not
exceed the setting in par. 4-13
Motor Speed High Limit [RPM]
.
6 How to Programme the Low Harmonic Drive
VLT AQUA Low Harmonic Drive Operating In-
structions
98 MG.20.T1.02 - VLT
®
is a registered Danfoss trademark
6
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