Siemens Simodrive 611 - Page 49

2 System Configuration
2
05.01
2.8 Line supply connection
2-49
 Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
For all other line supply types
1)
the NE module must be connected via an
isolating transformer.
Symmetrical 3–conductor or 4–conductor 3–phase line supply with a directly
grounded point, the loads are, e.g. connected to grounding electrodes, which
are not electrically connected to the directly grounded point of the line supply.
Commutating
reactor
U1 V1 1 W
TT line supply with grounded
neutral point and isolating transformer
Line supply/transformer for the plant
Isolating
transformer
PE
N
L3
L2
L1
PE
NE module
Commutating
reactor
U1 V1 1 W
TT line supply grounded phase conductor
and isolating transformer
Line supply/transformer for the plant
Isolating
transformer
PE
N
L3
L2
L1
NE module
PE
Z
Z
Fig. 2-10 Connection diagram, TT line supplies
1)
Matching transformer types are described in Catalog NC 60, Part 8.
TT line supply