17 Disturbances
This chapter describes possible causes for disturbances and measures for their removal. In case of increased
disturbances, please follow the measures for fault clearance ( 17.1). In case of disturbances that cannot be
eliminated by following the advice and the fault clearance measures given here, please contact the manufactur-
er (see second page).
17.1 Fault Clearance
The device, the connection line and the signal cable must not be installed next to sources of
interference that emit strong inductive or capacitive interference or strong electrostatic fields.
External perturbations can be avoided through suitable cable routing.
Signal cables always have to be routed separately from the load power line. A safety distance
of at least 0.5 m has to be kept from inductive and capacitive sources of interference such as
contactors, relays, motors, switching power supplies, clocked controllers etc.!
Concerning connection of the shield please refer to 10.4.13
If interferences occur in spite of all the items stated above being observed, please proceed as
follows:
1. Installation of RC-circuits via contactor coils of AC-contactors
(e.g. 0,1 µF / 100 Ω)
2. Installation of recovery diodes via DC-inductors
3. Installation of RC-circuits via the different motor phases
(in the terminal box of the motor)
4. Do not connect protective earth and ground
5. Connect a mains filter ahead of the external power pack
To Next Page
Loading...
Need help?
General
