Electrical installation
Important notes
6
l
154
EDS84ASC552 EN 8.1
( 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. 6−13).
) 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.
{ Danger!
Operation of the controller on a phase earthed mains with a rated mains
voltage of 400V:
ƒ The protection against accidental contact is not ensured without external
measures.
ƒ If protection against accidental contact acc. to EN 61800−5−1 is required for
the control terminals of the controller and the terminals for the plugged−in
device modules,
– an additional basic insulation must be available.
– the components to be connected must have the second basic insulation.
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