Parallel Connection Of Converters; Circuit Diagram Showing Parallel Connection Of Simotras Converters - Siemens SIMOTRAS 6SG7050 Operating Instructions Manual

Connections
6.3

Parallel connection of converters

6.3.1

Circuit diagram showing parallel connection of SIMOTRAS converters

3AC 50-60Hz
110-500V
3AC 50-60Hz, 400V
NC
4U1 4V1 4W1 5N1
Fan Power
supply
SIMOTRAS-converter (Slave)
CUD1
X165
34 37 38
1) The same phase sequence is required between U1(L1) / V1(L2) / W1(L3).
2) The same phase sequence is required between U2(T1) / V2(T2) / W2(T3).
3) The converters are connected by means of an (8-pin) shielded Patch cable of type UTP CAT5
according to ANSI/EIA/TIA 568, such as those used in PC networking.
A standard 5 m cable can be ordered directly from Siemens (order number: 6RY1707-0AA08).
(n-1) cables are needed to connect n converters in parallel.
The bus terminator must be activated (U805=1) on the converter at each end of the bus.
The terminal expansion option (CUD2) is required for each converter in a parallel connection.
A maximum of 6 converters can be connected in parallel.
When several converters are connected in parallel, the master unit should be positioned in the
center to allow for signal transit times. Maximum length of paralleling interface cable between
master and slave converters at each end of bus: 15m.
For the purpose of current distribution, separate commutating reactors of the same type are
required for each SIMOTRAS converter. Current distribution is determined by the differential reactor
tolerance. A tolerance of 5% or better is recommended for operation without derating (reduced
current).
Caution:
Parallel connections may only be made between converters with the same current rating!
6-18
1)
5W15U1 L1 L2 L3
CUD2
X166 U2 V2 W2
T1 T2 T3
2)
3)
NC
4U1 4V1 4W1 5N1 5W15U1 L1 L2 L3
Fan Power
supply
SIMOTRAS-converter (Master)
CUD1 CUD2
X165 X166 U2 V2
34 37 38
T1 T2
3)
M
3~
NC
1)
4U1 4V1 4W1 5N1 5W15U1
Fan Power
supply
SIMOTRAS-converter (Slave)
CUD1 CUD2
W2 X165 X166
34 37 38
T3
2)
3)
SIEMENS AG
SIMOTRAS HD Operating Instructions
01.04
1)
L1 L2 L3
U2 V2 W2
T1 T2 T3
2)
6SG7000-0BA76