Inverter Connection For Different Pulse Operation - Siemens SINAMICS G180 Installation And Operating Instructions Manual

Electrical connection
6.5 Line supply connection
● Connect the mains power cables L1-L2-L3 to terminals U1, V1, W1 of terminal strip -X1 of
the inverter: Refer to the technical data for the correct tightening torques for the power
cable connection.
6.5.5

Inverter connection for different pulse operation

Inverters with higher pulsed inputs are available for higher outputs from approx. 500 kW as
they cause smaller circuit feedback on the mains power supply.
Connect the inverter to the mains power supply depending on the pulse operation:
Table 6- 4
Pulse op-
eration
6
12
18
24
The type code can be found on the rating plate.
96
NOTICE
Destruction due to nonsymmetrical current distribution
In the case of high pulsing inverters, destruction of the rectifier can occur due to
nonsymmetrical current distribution. Pay attention to symmetrical current distribution.
Use the same cable types and lengths as well as the same connection technology for
every mains power connection. Route all cables on the same or a comparable route so
that the cable temperatures are the same.
Line supply connection dependent on the pulse operation
Can be recog-
nized in the type
code:
2T.A-...
2T.F-...
2T.K-...
2T.L-...
Connection at the inverter at –X1:U1, V1, W1
Three phases
Two secondary transformer systems each with three phases, i.e. a
total of six phases.
Both systems must be phase offset by 30°, e.g. using the transformer
vector group Dy5d6.
Three secondary transformer systems each with three phases, i.e. a
total of nine phases.
The three systems must each be phase offset by 20°, e.g. using the
transformer vector group Dy0y+20y-20.
Four secondary transformer systems each with three phases, i.e. a
total of twelve phases.
The four systems must each be phase offset by 15°, e.g. using two
transformers with the vector groups Dy5,25d6,25 and Dy4,75d5,75.
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007