Motor Power Factor (Cos Ø) - Danfoss VLT 8000 AQUA series Operating Instructions Manual

Select Thermistor trip [2] if cutting out (trip) is desired
when the connected thermistor overheats.
Select ETR Warning 1-4, if a warning is to come
up on the display when the motor is overloaded
according to the calculations.
The frequency converter can also be programmed to
give off a warning signal via one of the digital outputs.
Select ETR Trip 1-4 if tripping is desired when the
motor is overloaded according to the calculations.
NB!:
In UL / cUL applications ETR provides class
20 motor overload profection in accordance
with National Electrical Code.
118 Motor power factor (Cos ϕ)
(MOTOR PWR FACT)
Value:
0.50 - 0.99
Function:
This parameter calibrates and optimizes the AEO
function for motors of different power factor (Cos ϕ).
Description of choice:
Motors having > 4 poles have a lower power factor
which would restrict or prevent use of the AEO function
for energy savings. This parameter allows the user
to calibrate the AEO function to the power factor of
the motor so that AEO can be used with motors of
6, 8, and 12 poles as well as 4 and 2 poles.
NB!:
The default value is 0.75 and should NOT
be changed unless the specific motor
has power factor lower than 0.75. This
is typically the case for motors having more than
4 poles or low efficiency motors.
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.83.A2.02 - VLT is a registered Danfoss trademark
119 Load compensation at low speed
(LOAD COMP LO SPD)
Value:
0 - 300 %
Function:
This parameter enables compensation of voltage in
relation to load when the motor is running at low speed.
Description of choice:
Optimum U/f characteristics are obtained, i.e.
compensation for the load at low speed. The frequency
range within which Load compensation at low speed
is active, depends on the motor size.
This function is active for:
Motor size
0.5 kW (.75 HP) - 7.5 kW (10 HP)
11 kW (15 HP) - 45 kW (60 HP)
55 kW (75 HP) - 355 kW (600 HP)
0.75
120 Load compensation at high speed
(LOAD COMP HI SPD)
Value:
0 - 300 %
Function:
This parameter enables compensation of voltage in
relation to load when the motor is running at high speed.
Description of choice:
In Load compensation at high speed it is possible
to compensate for the load from the frequency
where Load compensation at low speed stopped
working to max.frequency.
This function is active for:
®
VLT 8000 AQUA
Change-over
< 10 Hz
< 5 Hz
< 3-4 Hz
100 %
100 %
105