Danfoss VLT FC 51 Series User Manual

4.5.4. 4-6* Speed Bypass
In some applications mechanical resonance may occur. Avoid resonance points by creating a by-
pass. The frequency converter ramps through the bypass area thereby passing mechanical
resonance points quickly.
4-61 Speed Bypass From [Hz]
Range: Function:
Array [2]
0.0 Hz *
[0.0 - 400.0 Hz] Enter either the lower or upper limit of the speeds to be avoided.
It does not matter whether Bypass From or Bypass Too is the
upper or lower limit, however the Speed Bypass function is dis-
abled if the two parameters are set to the same value.
4-63 Speed Bypass To [Hz]
Range: Function:
Array [2]
0.0 Hz *
[0.0 - 400.0 Hz] Enter either the upper or lower limit of the speed area to be
avoided.
Make sure to enter the opposite limit of that in par. 4-61
Speed
Bypass From [Hz]
.
4. Parameter Descriptions VLT Micro Drive FC 51
38 MG.02.C2.02 - VLT
®
is a registered Danfoss trademark
4

Danfoss VLT FC 51 Series Specifications

General

Enclosure	IP20
Operating Temperature	-10°C to +40°C (without derating), up to +50°C (with derating)
Output Voltage	0 to input voltage
Protection Features	Overcurrent, overvoltage, undervoltage, short circuit, overload, overtemperature, ground fault
Cooling Method	Forced convection
Input Voltage	200-240V AC, 380-480V AC