GEA ARIETE, Instructions For Use And Maintenance Manual

Page: 453 / 556

VLT
®
5000 Series
129
129 External motor fan
(MOTOR EXTERN FAN)
Value:
✭
No (NO)
[0]
Yes (YES)
[1]
Function:
This parameter makes it possible to tell the VLT fre-
quency converter whether the motor has an external
separately supplied fan on the motor (external venti-
lation), indicating that derating at low speed is
unnecessary .
Description of choice:
If Yes [1] is selected, the graph in the drawing below
is followed if the motor frequency is lower. If the mo-
tor frequency is higher, the time will still derate as if
no fan had been installed.
130
130 Start frequency (START FREQUENCY)
Value:
0.0 - 10.0 Hz
✭
0.0 Hz
Function:
This parameter allows setting of the output fre-
quency at which the motor is to start.
The output frequency ’leaps’ to the set value. This
parameter can be used e.g. for hoist applications
(cone rotor motors).
Description of choice:
Set the desired start frequency.
It is assumed that the start function in parameter
121 has been set to [3] or [4] and that a start delay
time has been set in parameter 120; also, a refer-
ence signal must be present.
131
131 Initial voltage (INITIAL VOLTAGE)
Value:
0.0 - parameter 103
✭
0.0 Volt
Function:
Some motors, such as cone rotor motors, need extra
voltage/starting frequency (boost) when starting, so
as to disengage the mechanical brake.
For this purpose use parameters 130/131.
Description of choice:
Set the desired value required to disengage the me-
chanical brake.
It is assumed that the start function in parameter
121 has been set to [3] or [4] and that a start delay
time has been set in parameter 120; also, a refer-
ence signal must be present.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.51.A1.02 - VLT is a registered Danfoss trade mark
119
Programming