KEB COMBIVERT F5 BASIC - Page 180

Functional Description Motor Data Adjustment
646
Name: Basis
KEB COMBIVERT F5-G / B
23.01.02
Chapter Section Page Date
© KEB Antriebstechnik, 2002
All rights reserved
Ohm
U
V
W
PE
6.6.4 Motor Stator
Resistance (dr.6)
The motor stator resistance is measured independent of the motor wiring (∆ / Y) with
a warm motor between 2 phases of the motor incoming line. To obtain a more exact
result all 3 values (U/V, U/W and V/W) can be measured and the average value be
formed.
In this way the ohmic line resistance is registered simultaneously (important in the
case of long incoming lines).
Fig. 6.6.3 Measuring the motor stator resistance
If the measured resistance
should be larger than the ma-
ximal value, the maximal
value is to be adjusted.
6.6.3 Motor Data from
Data Sheets (dr. 9)
Usually the breakdown torque factor (M
K
/M
N
) is not included in the motor rating plate.
This data is found in the corresponding data sheet or the motor catalog. For KEB
standard motors (4-pole) the information is listed in the following table:
kW 0,37 0,75 1,1 1,5 2,2 3,0 4,0 5,5 7,5
M
K
/M
N
2,2 2,3 2,5 2,6 3,1 2,8 3,2 3,0 2,9
kW 11,0 15,0 18,5 22,0 30,0 37,0 45,0 55,0 75,0
M
K
/M
N
3,3 3,0 2,9 2,6 2,4 2,5 2,5 2,3 2,2
kW 90,0 110,0 132,0 160,0 200,0 250,0 315,0
M
k
/M
N
2,2 2,2 2,2 2,0 2,4 2,3 2,5
If the motor stator resistance is taken from a data sheet, then there is usually R1
20
-
equivalent resistance (phase value) specified. Depending on the used connection the
following value must be adjusted in dr.6:
Star connection: dr.6 = 2 • R1
20
to 2,24 • R1
20
Delta connection: dr.6 = 0,666 • R1
20
to 0,75 • R1
20
If only the warm resistance R
W
is specified:
Star connection: dr.6 = 1,4 • R1
W
to 1,6 • R1
W
Delta connection: dr.6 = 0,46 • R1
W
to 0,53 • R1
W
Use suitable
measuring
devices