Efficient Networks S120 manual Pre-charging and bypass contactor chassis, Power OFF

Infeed

1.5 Pre-charging and bypass contactor chassis

Function diagrams (see SINAMICS S List Manual)

● 8934 Missing enables, line contactor control

Overview of key parameters (see SINAMICS S List Manual)

●r0863.1 CO/BO: Drive coupling status word/control word

●p0860 BI: Line contactor, feedback signal

1.5Pre-charging and bypass contactor chassis

Description

Pre-charging is the procedure for charging the DC link capacitors via resistors. Pre-charging is normally carried out from the feeding supply network, although it can also be carried out from a pre-charged DC link. The pre-charging input circuit limits the charging current of the DC link capacitors.

The pre-charging input circuit for Active and Smart Infeed in the chassis design comprises a pre-charging contactor with pre-charging resistors and a bypass contactor. The Active Line Module controls the pre-charging input circuit in the Active Interface Module via terminals.

The pre-charging input circuit in the Active Interface Module of module types FI and GI contains the bypass contactor. The bypass contactor must be provided separately for types HI and JI.

With the Smart Line Module, pre-charging is integrated in the Smart Line Module itself, although the bypass contactor must be provided externally.

For further information: see the Equipment Manual.

Procedure during power ON/OFF

Power ON:

●The pre-charging contactor is closed and the DC link is charged via the pre-charging resistors.

●Once pre-charging is complete, the bypass contactor is closed and the pre-charging contactor opened. The DC link is pre-charged and ready to operate. If pre-charging could not be completed, fault F06000 is output.

Power OFF:

● The pulses are inhibited and the bypass contactor is then opened.

44	Drive Functions
	Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4