Lenze E82xVxxxKxxxxx - Manual (Page 99)

Electrical installation
Notes on project planning
Supply forms / electrical supply conditions
6
l
99 EDS82EV903 EN 3.0
6.2 Notes on project planning
6.2.1 Supply forms / electrical supply conditions
Please comply with the operating conditions of each mains type:
Mains Type Restrictions Notes
With earthed neutral
(TT/TN systems) E82xVxxxKxxxxx l None −
With insulated star
point (IT systems) E82xVxxxKxB1xx 1)
(15 ... 90 kW)
l Operation with mains filters or RFI
filters is not permissible
2)
l Installation of a CE−typical drive
system: For the installation of
drives to IT systems, the same
conditions apply as for the
installation to TT/TN systems
l According to EN 61800−3, limit
values regarding RFI emission for
high frequencies are not specified
for IT systems.
l During DC−bus operation, central
supply with 9340 regenerative
power supply modules is not
possible.
All other l Operation not permissible
With earthed phase E82xVxxxKxxxxx l As in IT systems l Not UL−approved
DC supply via +U
G
/−U
G
E82xVxxxKxxxxx l The DC voltage must be
symmetrical to PE l The controller will be destroyed if
the +U
G
conductor or −U
G
conductor is earthed.
1) The "IT systems" version which is available in a power range from 15 to 90 kW also has an insulated structure, just
like the IT system. That way, insulation monitoring is prevented from responding, even if multiple frequency
inverters are installed. The frequency inverters have an increased electric strength so that damage to the inverter is
also prevented in the event of an insulation fault or earth fault in the supply system. Operational reliability of the
system remains ensured.
2) Operation with Lenze mains filters or RFI filters is not allowed because they contain components connected to PE.
The safety concept of the IT system would thus be set off.