SIEMENS
Configuring
4/3
Siemens D 86.2 · 2007
4
Step 4
Choosing the options
Further notes and alternatives
Completing the
motor Order No.
Specifying options for special
versions and tests.
See “Special versions” (Section 2).
Step 5
Determining the motor currents
Further notes and alternatives
Motor currents
Motor rated current for torque
of 16000 Nm in continuous
operation at 690 V
1425 A
See “Selection and ordering data” (Page 2/4).
(16000/16500) x 1470 = 1425 A
Required motor current for
max. torque of 18000 Nm
(temporary overload torque)
1603 A
(18000/16000) x 1425 = 1603 A
Step 6
Selection of the converter or the motor module
Further notes and alternatives
SINAMICS S120
Rated output current
I
rated
1603 A
Due to the current level of
1593 A, distribution over two
motor modules is necessary.
802 A per motor module
1603/2 = 802 A
Derating factor due to
two parallel motor modules
0.95
Current required
per motor module
844 A
802/0.95 = 844 A
Intermediate result for motor
module selection
910 A, 900 kW
Derating factor for increasing
the pulse frequency to 2.5 kHz
for 900 kW motor module
0.87
Derating factors must be taken into account in
general when pulse frequencies are increased.
They are dependent on the converter type and
converter rating. Derating factors are provided in
the configuration manuals or should be
requested.
Max. output current
of both motor modules
1504 A
(too low, because 1603 A
are necessary!)
2 x 910 A x 0.95 x 0.87 = 1504 A
Selection of the next
largest motor module
1025 A, 1000 kW
Derating factor for increasing
the pulse frequency to 2.5 kHz
for 1000 kW motor module
0.86
Max. output current
of both motor modules
1675 A (sufficient)
2 x 1025 A x 0.95 x 0.86 = 1675 A
SINAMICS S120 Vector Control:
2 Single Motor Modules
Order No.
6SL3320-1TH41-0AA0
The appropriate infeed must also be selected
in accordance with the SINAMICS catalog.
SINAMICS S120 Cabinet Modules:
2 Motor Modules
Order No.
6SL3720-1TH41-0AA0
The appropriate infeed must also be selected
in accordance with the SINAMICS catalog.
Step 7
Specification of the protection concept
Further notes and alternatives
A protection concept must be
specified when work has to be
carried out on the converter
and/or cables after switch-off
when the rotor is still revolving.
The protection concept depends on the operating conditions
and application. To specify any necessary protective measures,
please contact your Siemens sales representative.
See page 1/4 "Protection strategy"
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