Connecting And Disconnecting Individual Converters To The Dc Bus; Output Contactor - Siemens simovert master drive Operating Instructions Manual

08.96
6.6.1.3

Connecting and disconnecting individual converters to the DC bus

Switch the converter to the DC bus
Close the fuse disconnect switch
DC link is pre-charged through the pre-charging
resistors
Enter an on command
Bypass contactor is closed
Table 6.14 Sequence control for connecting/disconnecting individual converters to the bus
6.6.2

Output contactor

It is not necessary that the converter is operated with output
contactor.
If the converter is operated with output contactor, binary output-
X9:4,5 is provided for contactor control (re-assignment).
The checkback signal can be connected to a binary input (e.g.
binary input 3).
Sequence control, on command-operation (effect on the bypass-or output contactor)
For the special case, where a customer wishes to connect-up both an electrical DC link coupling as well as an
output contactor, then one of the two must be energized through a binary output. For higher ratings, an
additional auxiliary contactor must be provided due to the 230 V AC required (contactor coil).
Siemens AG 6SE7087-6BM70
SIMOVERT MASTER DRIVES
Sequence control
Operating Instructions
Isolate the converter from the DC bus
Output an off command
Bypass contactor drops out
Open the fuse disconnect switch
Converter is electrically isolated from the DC bus
Wait until the DC link capacitors have completely
discharged
-X1
-X2
-K11
Fig. 6.7
NOTES
C/ D/
L+ L-
-X9:4
-X9:5
-X101:13
-X101:18
U2/ V2/ W2/
T1 T2 T3
M
3
Example for connecting-up a output
contactor
Options
Auxiliary voltage
output contactor
-K11
-K11
6-11