Siemens SIMOVERT MASTERDRIVES Manual page 32

02.2004
2.1.4 Configuration and connection examples (Compact PLUS)
NOTE
1) Line contactor
Q1
2) Line fuses
3) Line
commutating
reactor
4) 24 V power
supply
5) ON/OFF
6) OFF switch
Siemens AG 6SE7087-6QX70 (Version AD)
SIMOVERT MASTERDRIVES
The following explanations refer to the numbered gray triangles in Figs.
2-1 to 2-3. These figures are just examples of possible configurations of
drives. The necessary individual components have to be clarified
according to the specific task.
The information and notes required for dimensioning the individual
components and the respective order numbers can be found in the
Catalog.
All the equipment is connected to the line via the line contactor, which
is used to separate it from the line if required or in the event of a fault.
The size of the line contactor depends on the power rating of the
connected converter or inverter.
If the line contactor is controlled from the converter, the main contactor
checkback time P600 should be set to at least 120 ms.
According to their response characteristic and to suit the requirements,
the line fuses protect the connected cables and also the input rectifier
of the unit.
The line commutating reactor limits current spikes, reduces harmonics
and is necessary for keeping system perturbations to within the limits
laid down by VDE 0160.
The external 24 V supply is used to maintain the communication and
diagnostics of the connected-up units even with powered-down line
voltage.
The following criteria apply regarding dimensioning:
♦ A current of 1 A must be provided for the rectifier unit, and a current
of 2 A for each inverter connected.
♦ When the 24 V supply is powered up, an increased inrush current
will be generated that has to be mastered by the power supply.
♦ No controlled power supply unit has to be used; the voltage must be
between 20 V and 30 V.
In the case of a single drive and a multi-axis drive without a rectifier
unit, a switch is used to energize or de-energize the line contactor.
When they are switched off, the drives are not brought to a controlled
standstill, but are braked only by the load.
In the case of a multi-axis drive with a rectifier unit, a pushbutton is
used to energize the line contactor. The line contactor is kept energized
by means of a lock-type contact connected to the fault signaling relay of
the rectifier unit, as long as no fault is detected at the rectifier unit.
Operating the OFF switch causes the line contactor to open
immediately.
The drives are not brought to a controlled standstill, but are braked only
by the load.
Compendium Motion Control
Configuration and Connection Examples
2-5