VLT
®
8000 AQUA
Programming
V), a special ohm-meter should be used (Thomson
bridge or similar). R
S
= 0.5 x R
PHASE-to-PHASE
4. The factory settings of R
S
, selected by the AFD itself
on the basis of the motor nameplate data, are used.
124 Stator reactance
(STATOR REACT.)
Value:
✭
depends on the choice of motor
Function:
After setting motor data in parameters 102-106, a
number of adjustments of various parameters are
made automatically, including the stator resistance
X
S
. The shaft performance can be improved by
fine-tuning R
S
and X
S
, see procedure below.
Description of choice:
X
S
can be set as follows:
1. Automatic motor adaptation, where the AFD
actually tests the motor to determine this value.
All compensations are reset to 100%.
2. The values are stated by the motor supplier.
3. These values are obtained by means of
manual measurements:
- X
S
can be calculated by connecting a motor to
line and measuring the phase-to-phase voltage
U
L
as well as the idling current I.
Alternatively, these values can be recorded
during operation in idle running state at the
rated motor frequency f
M,N
, slip compensation
(par. 115) = 0% and load compensation at
high speed (par. 114) = 100%.
4. The factory settings of X
S
, selected by the AFD itself
on the basis of the motor nameplate data, are used.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.80.A7.22 - VLT is a registered Danfoss trademark
101
Rosewood STP ST42 General (Operation and Maintenance Manual - Part 4:
Section 6.3 Manufacturers Manuals 6.3.33 Danfoss VLT Aquadrive 8000) Vendor Manual
QP Id: VM207
Active: 03/09/2013
Page 107 of 208