9-6 Types of Mains Connection Rexroth IndraDrive
DOK-INDRV*-SYSTEM*****-PR02-EN-P
Group Supply with DC Bus Connection of the Groups
Group supply with DC bus connection increases the available
regenerative power and continuous braking resistor power in the common
DC bus of several drive controllers or drive systems.
Note: Apart from the illustrated connection of the drive controller to
the mains and to the DC bus, the following connections have
to be wired:
• Bb contacts at control section (see Project Planning
Manual for control section)
• control voltage supply
• module bus
• equipment grounding conductor
Note: The connection lines to the drive controllers should preferably
have the same impedances in order to achieve balanced load
distribution at the power input of the drive controllers. From the
common node of the lines, you therefore have to make sure
that
• the lengths of the supply lines and
• the cross sections of the supply lines are the same.
Note: At the common DC bus there is less than the sum of the
device-specific power data available. This particularly applies
to the continuous DC bus power P
DC cont
and the continuous
regenerative power P
BD
. Both power data are included in the
sum in reduced form. The reduction takes place with the
corresponding balancing factors for parallel operation.
For these data see the Project Planning Manual of the
respective component.
Note: Only realize group supply with DC bus connection with drive
controllers or supply modules of the same type current or type
performance.
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