Lenze 8400 - Manual (Page 155)

Electrical installation
Important notes
6

155 EDS84ASC552 EN 9.1

Stop!
Use of RFI filters in IT systems
The controllers must not be operated with mains filters and RFI filters from
Lenze because these filters contain components connected to PE.
Possible consequences:
ƒ The filters may be destroyed when an earth fault occurs.
ƒ
Monitoring of the IT system may be triggered.
Protective measures:
ƒ
Do not use RFI filters from Lenze in IT systems.
ƒ Before using the controller in IT systems, remove the two contact screws for
interference suppression (on the supply side and on the motor side).

Stop!
Overvoltage at components:
In case of an earth fault in IT systems, intolerable overvoltages may occur in
the plant.
Possible consequences:
Destruction of the device.
Protective measures:
Before using the controller in the IT system, remove the contact screws on the
supply side and the motor side. ( Fig. 6-14).

Note!
Switching on the controller motor side is permissible for safety shutdown
(emergency stop) and for operation of several motor on the controller (only in
V/f operating mode!).
Please observe the following:
ƒ
When switching with the controller enabled, you can activate monitoring
functions of the controller. If no monitoring function is activated, switching
is permissible.
ƒ The switching elements on the motor side must be dimensioned in
accordance with the maximum occurring load.