SINAMICS S120
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
368/528
6.7 Connection of Motor Modules to a common DC busbar
6.7.1 Direct connection to the DC busbar
With this connection method, a continuous direct connection between the Motor Modules and the DC busbar is made
without separable contact points using bar conductors, cables or fuses.
Direct connection of a Motor Module to the DC busbar
Each Motor Module must be provided with separate fuse protection.
Air-cooled S120 Motor Modules in Chassis format are equipped as standard for this purpose with integrated, fast
semiconductor fuses in both the positive and negative paths. These disconnect the Motor Module quickly, reliably
and completely from the DC busbar in the event of an internal short circuit, which means that these Motor Modules
can be bolted directly onto the DC busbar by means of short bar conductors or cables.
Liquid-cooled S120 Motor Modules in Chassis format do not feature integrated fuses. They must therefore be
connected to the DC busbar via externally mounted, fast semiconductor fuses. The fuse types recommended for the
direct connection method are listed in the table below.
Output power
at
400 V / 690 V
[kW]
IEC semiconductor fuses
(number per Motor Module)
Class aR
Number x Order No.
I
rated
[A]
Size
Power
loss
[W]
UL fuses
(number per Motor
Module)
Number x Order No.
I
rated
[A]
Size
DC link voltage 510 V – 720 V DC
110 2 x 3NE3 230-0B 315 1 2 x 65 2 x 3NB1 231-4KK11 315 2L
132 2 x 3NE3 232-0B 400 1 2 x 85 2 x 3NB1 234-4KK11 400 2L
160 2 x 3NE3 233 450 1 2 x 95 2 x 3NB1 337-4KK11 500 3L
250 2 x 3NE3 336 630 2 2 x 100 2 x 3NB1 345-4KK11 800 3L
315 2 x 3NE3 338-8 800 2 2 x 130 2 x 3NB2 345-4KK16 800 2x2L
400
1)
4 x 3NE3 334-0B 500 2 4 x 90 2 x 3NB2 350-4KK16 1000 2x3L
450 4 x 3NE3 335 560 2 4 x 95 2 x 3NB2 350-4KK16 1000 2x3L
560 4 x 3NE3 336 630 2 4 x 100 2 x 3NB2 355-4KK16 1400 2x3L
710
1)
4 x 3NE3 340-8 900 2 4 x 165 2 x 3NB2 364-4KK17 2100 3x3L
800 4 x 3NE3 340-8 900 2 4 x 165 2 x 3NB2 364-4KK17 2100 3x3L
DC link voltage 675 V – 1035 V DC
90 2 x 3NE3 224 160 1 2 x 42 2 x 3NB1126-4KK11 200 1L
132 2 x 3NE3 225 200 1 2 x 42 2 x 3NB1128-4KK11 250 1L
200 2 x 3NE3 230-0B 315 1 2 x 65 2 x 3NB1231-4KK11 315 2L
315 2 x 3NE3 233 450 1 2 x 95 2 x 3NB1337-4KK11 500 3L
450
1)
2 x 3NE3 336 630 2 2 x 100 2 x 3NB1345-4KK11 800 3L
560 4 x 3NE3 232-0B 400 1 4 x 85 2 x 3NB2345-4KK16 800 2x2L
710
1)
4 x 3NE3 335 560 2 4 x 95 2 x 3NB2350-4KK16 1000 2x3L
800 4 x 3NE3 335 560 2 4 x 95 2 x 3NB2350-4KK16 1000 2x3L
1000 4 x 3NE3 337-8 710 2 4 x 105 2 x 3NB2357-4KK16 1600 2x3L
1200 4 x 3NE3 340-8 900 2 4 x 165 2 x 3NB2364-4KK17 2100 3x3L
1500
1)
6 x 3NE3 337-8 710 2 6 x 105 2 x 3NB2366-4KK17 2400 3x3L
1) The IEC fuses specified for these units are not UL-approved
Fuses recommended for direct connection of liquid-cooled S120 Motor Modules in Chassis format to a DC busbar
Note:
The IEC fuses listed in the table above are identical to the fuses integrated in the air-cooled SINAMICS S120 Motor
Modules of the same power rating.
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