Johnson Controls SABROE Unisab III Control, Engineering Manual

Page: 192 / 348

Engineering manual - UniSAB III 1.10.8
192/346
001930 en 2021.06
Set-up
6.4.1 Drive
The Drive menu includes the set-up for motor and frequency drive.
1: Motor range Amp
0 to 2500 Amp
This value can be read on the current transformer at the compressor motor guard (not on the compres-
sor motor) so that the 0-1 Amp. signal is read correctly on UniSAB III as the current absorbed by the mo-
tor. Enter current in picture
Motor/Motor curr/parameter . Any indication errors can be eliminated from the
reading on the display by multiplying the measuring range with a correcting factor before entering the
current range in the UniSAB III display:
See also 5: Motor input signal.
2: Motor range kW
0 to 2500 kW
Enter the value corresponding to 20mA input. When using a Vacon converter, this value is read on the
frequency converter name plate and multiplied by two so that the 4-20 mA signal is read correctly in Uni-
SAB III as the motor power. Enter the motor nominal power in
Motor nom kW .
3: Motor nom kW
0 to 2500 kW or Amp
Adjust this point to fit a curve for the actual motor efficiency used for the COP calculation. See the COP
manual for further information.
Correction =
display reading
measured current