Connection For Dc Coupling - Siemens SINAMICS V20 Operating Instructions Manual

Connection for DC coupling

The following figure illustrates the system connection using DC coupling.
See Sections "Typical system connections (Page 37)" and "Terminal description (Page 40)"
for the recommended fuse types, cable cross-sections and screw tightening torques.
Destruction of inverter
It is extremely important to ensure that the polarity of the DC link connections between the
inverters is correct. If the polarity of the DC terminals' connections is reversed, it could
result in the destruction of the inverter.
Safety awareness
The coupled SINAMICS V20 inverters must both be of equal power and supply voltage
rating.
The coupled inverters must be connected to the mains supply through a single contactor
and fuse arrangement rated for a single inverter of the type in use.
A maximum of two SINAMICS V20 inverters can be linked using the DC coupling
methodology.
SINAMICS V20 Inverter
Operating Instructions, 09/2014, A5E34559884
WARNING
CAUTION
Commissioning
5.6 Function commissioning
129