Special Features To Note When Precharging Sinamics G150 Parallel Converters - Siemens SINAMICS G130 Engineering Manual

Special features to note when precharging SINAMICS G150 parallel converters

At G150 parallel converters, each of the two partial converters has a main rectifier equipped with thyristors and a
small precharging rectifier equipped with diodes, which is connected in parallel to the main rectifier. If both partial
converters are connected to the supply voltage at the same time, the DC links are charged via the two precharging
rectifiers and the associated precharging resistors.
In the case of drive configurations where the DC links of both partial converters are connected to one another, the
precharging principle described requires both of the partial converters to be connected to the supply system at the
same time. Otherwise, the precharging rectifiers and precharging resistors of the partial converter connected first
would have to precharge the entire DC link. These components are not thermally dimensioned for this type of
operation and would, therefore, be overloaded or even destroyed.
To ensure that both partial converters are connected to the supply system at the same time, the G150 parallel
converters must be equipped with option L13 / main contactor (for I
≥ 1500 A). In this way, the internal converter control can ensure that precharging takes place correctly.
(for I
converter
Options L13 and L26, which are listed in the table are, therefore, obligatory and cannot be removed from the
selection.
Output power Converter cabinet unit
SINAMICS G150,
[kW] Version A
380 V to 480 V 3AC
630 6SL3710–2GE41–1AA0
710 6SL3710–2GE41–4AA0
900 6SL3710–2GE41–6AA0
500 V to 600 V 3AC
630 6SL3710–2GF38–6AA0
710 6SL3710–2GF41–1AA0
1000 6SL3710–2GF41–4AA0
660 V to 690 V 3AC
1000 6SL3710–2GH41–1AA0
1350 6SL3710–2GH41–4AA0
1500 6SL3710–2GH41–5AA0
Required options for ensuring correct precharging
converter
Required option
L13 / main contactor
L13 / main contactor
L26 / circuit breaker
L13 / main contactor
L13 / main contactor
L13 / main contactor
L13 / main contactor
L13 / main contactor
L26 / circuit breaker
SINAMICS Engineering Manual - May 2008
SINAMICS G150
Engineering Information
< 1500 A) or option L26 / circuit breaker
© Siemens AG
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