Wiring the standard device
Operating conditions for drive controller of variants V024 and V100 on IT system
5
5.3
5.3-1
EDSVF9333V EN 3.0-06/2005
5.3 Operating conditions for drive controller of variants V024 and V100 on IT system
In the special edition ”IT system”, operating the 9300 vector frequency
inverter on insulated supplysystems is possible. The frequency inverters also
feature an insulated design. This prevents the insulation monitoring from
responding, even if several frequency inverters are installed.
The electric strength of the frequency inverters is increased so that damages
to the frequency inverter are avoided if insulation errors or earth faults in the
supply system occur. Theoperational reliability ofthe system remains intact.
Stop!
Operate the devices only with assigned mains chokes.
The operation with Lenze mains filters or Lenze RFI filters is not
allowed since these items contain components that are
interconnected to PE. It would cancel the protection concept of
theITsystem.Thecomponentsaredestroyedincaseofearth
fault.
Mains Operation of the drive
controllers
Notes
With insulated star point
(IT systems)
Allowed without restrictions
Operation with mains filters
or RFI filters is not allowed.
With earthed external
conductor
Allowed without restrictions
(not UL-approved)
DC supply via +UG/-UG Allowed without restrictions –
Central supply with 9340 regenerative power supply module is not possible.
For the installation of drives on IT systems, the same conditions apply as for
the installation on systems with earthed neutral point.
According to the binding EMC product standard EN61800-3, no limit values
are defined for IT systems for noise emission in the high-frequency range.
Mains connection
Permissible supply forms and
electrical supply conditions
DC-bus operation of several
drives
Installation of the CE-typical
drive system
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