Use On It Systems - Lenze EVS9321 Instructions De Montage

4.2

Use on IT systems

Controllers in the V024, V104 or V100 variants are suitable for operation on insulated
supply systems (IT systems). The controllers are also designed in an insulated manner. This
avoids that the insulation monitoring is activated, even if several controllers are installed.
The electric strength of the controllers is increased so that damages to the controller are
avoided if insulation errors or earth faults in the supply system occur. The operational
reliability of the system remains intact.
Mains connection

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 the IT system. The components are destroyed in case
of earth fault.
Permissible supply forms and electrical supply conditions
Mains
With insulated star point
(IT systems)
With earthed external conductor
DC supply via +U
DC-bus operation of several drives
Central supply with 9340 regenerative power supply module is not possible.
Installation of the CE-typical drive system
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.
EDKVS9332X DE/EN/FR 2.0
Operation of the drive controllers
Allowed without restrictions
Allowed without restrictions (not
UL-approved)
/-U Allowed without restrictions
G G

Electrical installation
Use on IT systems
Notes
Operation with mains filters or RFI
filters is not allowed.
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