Siemens SINAMICS G130 Engineering Manual page 318

Drive Dimensioning
Engineering Information
5th step Motor current calculation
Motor currents Motor rated
current for torque
of 16 000 Nm in
continuous duty at
690 V
Required motor
current for max.
torque of 18 000
Nm (brief overload
torque)
Selection of the converter or the
6th step
S120 Motor Module
Select the SINAMICS Rated output
S120 system current I
Due to the amper-
age of 1593 A, the
current must be
distributed bet-
ween two Motor
Modules.
Derating factor for
two parallel Motor
Modules
Current required
per Motor Module
Intermediate
result for Motor
Module selection
Derating factor for
increasing the
pulse frequency to
2.5 kHz for the
900 kW Motor
Module
Max. output
current of both
Motor Modules
Selection of the
next largest Motor
Module
Derating factor for
increasing the
pulse frequency to
2.5 kHz for the
1000 kW Motor
Module
Max. output
current of both
Motor Modules
SINAMICS S120 Vector Control:
2 Single Motor Modules
Order No. 6SL3320-1TH41-0AA0
SINAMICS S120 Cabinet Modules:
2 Motor Modules
Order No. 6SL3720-1TH41-0AA0
SINAMICS Engineering Manual – May 2008
318/396
© Siemens AG
1416 A
1593 A
≥ 1593 A
rated
797 A per
Motor Module
0.95
840 A
910A,
900 kW
0.87
1504 A (too
low, because
1593 A is
needed!)
1025 A,
1000 kW
0.86
1675 A
(sufficient)
Further notes and alternatives
See "Selection and ordering data" catalog D86.2 / Chapter 22.
(16 500/16 000) x 1416 = 1460 A
(18 000 / 16 000) x 1416 = 1593 A
Further notes and alternatives
1593/2 = 797 A
See section "Parallel connections of converters" in this
engineering manual
797/0.95 = 840 A
The de.rating factors are dependent on the converter type and
converter output. They can be found in the chapters on specific
unit types in this engineering manual.
2 x 910 A x 0.95 x 0.87 = 1504 A
The derating factors are dependent on the converter type and
converter output. They can be found in the chapters on specific
unit types in this engineering manual.
2 x 1025 A x 0.95 x 0.86 = 1675 A
The relevant Infeed must be selected as well.
The relevant Infeed must be selected as well.