Parallel Connections Of Motor Modules; General; Minimum Motor Cable Lengths For Motors With Common Winding System - Siemens SINAMICS G130 Engineering Manual

6.11 Parallel connections of Motor Modules

6.11.1

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".
6.11.2

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 Chassis format with air cooling (frame sizes FX, GX, HX and JX) and with liquid cooling (frame
sizes FXL, GXL, HXL and JXL). The length specification refers to the distance between the output of each Motor
Module and the motor terminal box as measured along the motor cable.
Motor Module
P at 400V
rated
Frame size
[kW]
Anschlussspannung DC 510 V bis 720 V
FX / FXL 110
FX / FXL 132
GX / GXL 160
GX 200
GX / GXL 250
HX / HXL 315
HX / HXL 400
HX / HXL 450
JX / JXL 560
JX / JXL 710
JX / JXL 800
JX / JXL 800
Motor Module
P at 500V
rated
Frame size
[kW]
Anschlussspannung DC 675 V bis 900 V
FX 55
FX / FXL 55
FX 75
FX / FXL 90
GX 110
GX / GXL 132
GX 160
GX / GXL 200
HX 250
HX / HXL 315
HX / HXL 400
JX / HXL 500
HXL 560
JX / JXL 560
JX 630
JX / JXL 710
JX / JXL 900
JXL 1000
1)
permissible tolerance: –20 %
2)
These values apply to Motor Modules with line supply voltages of 500 V to 690 V 3AC (order number 6SL3x2x-1TGxx-xAA3).
Min. cable lengths for parallel connections of S120 Motor Modules connected to motors with a common winding system
Motor supply cable
1)
I
Minimum length
rated
[A] [m]
210 30
260 27
310 20
380 17
490 15
605 13
745 10
840 9
985 8
1260 6
1330 5
1405 5
Motor supply cable Motor Module
1)
I
Minimum length
rated
[A]
[m]
2)
85 80
100 72
120 65
150 55
175 50
215 40
260 32
330 25
410 20
465 18
575 15
735 13
810 13
810 11
910 10
1025 8.5
1270 7
1560 6
SINAMICS Engineering Manual – November 2015
Engineering Information
P at 690V
Frame size
rated
[kW]
Anschlussspannung DC 890 V bis 1035 V
FX 75
FX / FXL 90
FX 110
FX / FXL 132
GX 160
GX / GXL 200
GX 250
GX / GXL 315
HX 400
HX / HXL 450
HX / HXL 560
JX / HXL 710
HXL 800
JX / JXL 800
JX 900
JX / JXL 1000
JX / JXL 1200
JXL 1500
SINAMICS S120
Motor supply cable
I Minimum length
rated
[A]
[m]
2)
85 100
100 90
120 80
150 70
175 60
215 50
260 40
330 30
410 25
465 25
575 20
735 18
810 18
810 15
910 12
1025 10
1270 8
1560 7
381/528
Ó Siemens AG
1)