ABB ACS880 PCP - Current calculation; Primary and secondary voltage calculation

488 Appendix: ESP with step-up transformer and sine filter
 Current calculation
For ESP with sine filter and step-up transformer instead of using the motor rating
plate data, set parameter 99.07 Motor nominal voltage according to the nominal
supply voltage of the drive (example: 690 V). Also set the parameter 99.06 Motor
nominal current to
Where U
1
and U
2
are the primary and secondary voltages of the step-up transformer
respectively.
 Primary and secondary voltage calculation
Required data:
Motor:
Cable:
If the cable characteristics are not known, typical values can be used:
Motor data:
Nominal impedance,
Resistive component,
Reactive component,
Cable reactance at frequency f,
U
2
U
1
------
I
n
⋅
U
n
I
n
ϕ
n
()f
n
,cos,,
R
c
L
c
length,,
R
c
0.27
Ω
km
-------
=
L
c
0.33
mH
km
------- --
=
Z
m
U
n
I
n
3⋅
----- -----------
=
R
m
Z
m
ϕ
n
()cos⋅=
X
m
Z
m
1
2
cos ϕ
n
()–⋅=
X
c
2πfL
c
=