Siemens Simovert Masterdrives Compendium page 41

12.2010
2.2.4 Explanations relating to the configuration examples (Compact and
chassis-type units)
NOTE
1) Q1 line contactor
2) Line fuses
3) Line
commutating
reactor
4) 24 V power
supply
5) ON/OFF
6) OFF switch
Siemens AG 6SE7087-6QX70 (Version AM)
SIMOVERT MASTERDRIVES
The following explanations refer to the numbered gray triangles in Figs.
2-4 to 2-6, showing the drives in an example configuration. The
application decides which components are required.
In the catalog you will find the necessary information, order numbers
and notes concerning the ratings of the individual components.
The line contactor is used to connect the entire system up to the supply
and disconnect it from the supply if required or in the event of a fault.
Dimensioning depends on the output of the connected converters or
inverters.
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. Rectifier units always require an external 24 V supply.
The following criteria apply regarding dimensioning:
♦ Currents (see catalog DA65.11)
♦ 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.
On a single drive, the line contactor is also switched (via X9: 7,9) with
the ON/OFF command (e.g. via the control terminal strip). When it is
switched off, depending on the parameterization, the drive is brought to
a standstill in a controlled manner before the line contactor opens.
If the line contactor (1) is controlled from the converter (via X9:7,9), the
main contactor checkback time P600 should be set to at least 120 ms.
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.
The line contactor is opened as soon as the OFF switch is activated.
The drives are not brought to a standstill in a controlled manner; they
are braked only by the connected load.
Compendium Motion Control
Configuration and Connection Examples
2-13