Siemens SIROTEC Engineering Manual

SINAMICS S120 Cabinet Modules
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
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7.2.8.3 Parallel connections of Motor Modules
7.2.8.3.1 General
Motor Modules connected in parallel must always be identical in terms of type, voltage rating and power rating. If
SINAMICS S120 Motor Modules are connected in parallel, imbalances in current distribution can occur despite the
current compensation control. This means that a current derating factor of 5 % must be applied to parallel
connections.
In the case of motors with a common winding system, it is important to observe the specified minimum cable lengths
between the Motor Modules and the motor in order to ensure that the parallel-connected Motor Modules are
decoupled. If it is not possible to realize cabling with the minimum required cable length, motor reactors or filters must
be installed.
For detailed information on the subject of parallel converters, refer to section "Parallel connections of converters" in
chapter "Fundamental Principles and System Description".
7.2.8.3.2 Minimum motor cable lengths for motors with common winding system
The table below specifies the minimum required motor cable lengths for parallel connections of SINAMICS S120
Motor Modules in air-cooled Cabinet Modules format, whereby the given length is the distance between the output of
each Motor Module and the motor terminal box as measured along the motor cable.
Motor Module Motor supply cable
Frame size
P
rated
at 400V
[kW]
I
rated
[A]
Minimum length
1)
[m]
Supply voltage 510 V – 720 V DC
FX 110 210 30
FX 132 260 27
GX 160 310 20
GX 200 380 17
GX 250 490 15
HX 315 605 13
HX 400 745 10
HX 450 840 9
JX 560 985 8
JX 710 1260 6
JX 800 1405 5
Motor Module Motor supply cable
Motor Module
Motor supply cable
Frame size
P
rated
at 500V
[kW]
I
rated
[A]
Minimum length
1)
[m]
Frame size
P
rated
at 690V
[kW]
I
rated
[A]
Minimum length
1)
[m]
Supply voltage 675 V – 900 V DC
2)
Supply voltage 890 V – 1035 V DC
2)
FX 55 85 80 FX 75 85 100
FX 55 100 72 FX 90 100 90
FX 75 120 65 FX 110 120 80
FX 90 150 55 FX 132 150 70
GX 110 175 50 GX 160 175 60
GX 132 215 40 GX 200 215 50
GX 160 260 32 GX 250 260 40
GX 200 330 25 GX 315 330 30
HX 250 410 20 HX 400 410 25
HX 315 465 18 HX 450 465 25
HX 400 575 15 HX 560 575 20
JX 500 735 13 JX 710 735 18
JX 560 810 11 JX 800 810 15
JX 630 910 10 JX 900 910 12
JX 710 1025 8.5 JX 1000 1025 10
JX 900 1270 7 JX 1200 1270 8
1)
permissible tolerance: –20 %
2)
These values apply to Motor Modules with line supply voltages of 500 V to 690 V 3AC (order number 6SL3720-1TGxx-xAA3).
Min. cable lengths for parallel connections of S120 Motor Modules connected to motors with a common winding system

Siemens SIROTEC Specifications

General

Brand	Siemens
Model	SIROTEC
Category	DC Drives
Language	English