7
05.01
7.2 Voltage matching
7-208
©
Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
Symmetrical 3–conductor or 4–conductor three–phase line supply with no di-
rectly grounded point. The loads are connected, e.g. with grounds.
Commutating
reactor
U1 V1 W1
IT line supply and isolating transformer
connection schematic
Line supply/transformer for the factory
Isolating
transformer
PE
N
L3
L2
L1
NE module
Commutating
reactor
U1 V1 W1
IT line supply and isolating transformer
connection schematic
Line supply/transformer for the factory
Isolating
transformer
PE
N
L3
L2
L1
NE module
PE
PE
Line filter
Line filter
Fig. 7-5
IT line supplies connection schematic
Thus, within the pulsed transistor converter, the voltage stressing on the insulat-
ing clearances between the power circuits at the line supply potential and the
open and closed–loop control circuits referred to the protective conductor poten-
tial, according to a rated voltage of 300 V complies with IEC/DIN EN 50178.
Due to the 6–pulse 3–phase bridge circuit in the line supply infeed module, any
fault currents will contain DC components. This must be taken into consider-
ation when selecting/dimensioning a fault current protective device, e.g. an
RCCB.
IT line supply
7 Line Supply Connection
11.05
