Electrical Installation
100 Operating instructions RLD
ELTROPLAN
-
REVCON
Elektrotechnische Anlagen GmbH
4.6
Installation of a power feedback unit in a CE-typical drive system
General
•
The user is responsible for the compliance of his application with the EC
directives
.
-
If you observe the following measure you can be sure that the drive system
will not cause any power-feed/feedback-unit-caused EMC problems, i.e.
comply with the EMC
Directive when running the machine.
-
If devices which do not comply with the CE requirement concerning noise
immunity EN 61000-6-2 are operated close to the power feed/feedback unit,
these devices may be interfered electromagnetically by the power
feed/feedback units.
Assembly
•
Connect the power feed/feedback unit and the RFI-filter to the grounded
mounting plate with a wire of large cross section as possible:
–
Mounting plates with conductive surfaces (zinc-coated or stainless steel) al-
low permanent contact.
–
Varnished boards should not be used for installation in accordance with
EMC.
•
If you use several mounting plates:
–
Connect as much surface of the mounting plates as possible (e.g. with copper
bands)
•
Ensure the separation of power and control cables.
•
Cable guides as close as possible to the reference potential. Unguided cables
have the same effect as aerials.
Filters
•
Use RFI filters which are assigned to the power feed/feedback unit.
RFI filters reduce impermissible high frequency interference to a permissi-
ble value.
Screening
•
Metallic cable glands ensure a big-surface connection between screen and
housing
•
If the screened wire are interrupted at relays or terminals:
-
Connect the screens of the wires with a big surface to the mounting plate.
•
If the mains wires between RFI-filter and power feed/feedback unit are long-
er than 300mm:
-
Use screened mains wires
-
Connect the screen direct at the controller / power feed/feedback unit and at
the RFI-filter to the mounting plate.
•
Screen the control wires:
-
Connect the screens on the shortest possible way to their terminals.
Earthing
•
All metallic conduction components (power feed/feedback unit, controller,
RFI-filter) have to be connected to one common earthing point (PE-bus bar).
•
Observe the in the safety guidelines defined minimum cross sections:
-
For EMC not the cross section, but the surface of a wire and the contact to
the mounting plate is important for the function.
Содержание RLD B
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