KEB Combivert, Начало работы

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ANTRIEBSTECHNIK
15
3. EMC Fundamentals
3.1 General
Frequency inverters/servo drives are electrical equipment for use in industrial and
commercial systems. They are used for the stepless speed adjustment of three-
phase/permanent magnet motors. In accordance with the EMC-directive 89/336/EEC
these units do not require a CE-marking. In the sense of the EMC-directive and the
EMVG the frequency inverter/servo drive components are not designed for stand
alone operation, while they are only a part of the machine/system to be used by
competent machine or system manufacturers.The proof of compliance with the
required protective measures in the EMC-directives must be furnished by the
erector/owner of the machine/system.
By using interference filters specified by KEB and following the advice given the
quoted limits are realized.
According to production norm EN 61800-3, the KEB COMBIVERT with filter
is designed to be used in class "A" environments.
;
Install the cabinet or system correctly.
;
In order to prevent noise crosstalk
– Mains/supply lines
– Motor lines from inverters and servo controllers
– Control and data lines (low voltage levels < 48V)
must have a clearance of at least 15 cm when installed.
;
In order to maintain low-resistance high frequency connections, earthing and
shielding, as well as other metallic connections (e.g. mounting plate, installed
units) must be in metal-to-metal contact with the mounting plate, over as large
an area as possible. Use earthing and equipotential lines with a section as
large as possible (min. 10mm
2 ) or use thick earthing strips.
;
Only use shielded cable with copper or tin-plated braid, since steel braid is not
suitable for high frequency ranges. Always install the shield with clamps or
metal cable glands onto the equalizing bars and/or PE-connections. Do not
extend cable screens with single wires, but connect the braid directly to the
appropriate point.
;
If external interference suppression filters are used, then these must be
installed as close as possible to (<30cm from) the interference source and in
metal-to-metal contact with the mouting plate, over as large an area as
possible.
;
Always equip inductive control elements (contactors, relays etc.) with
suppressors such as varistors, RC-elements or damping diodes.
;
All connections must be kept as short as possible and as close as possible
to the earth, as free floating lines work as active and passive aerials.
;
Keep connection cables straight (do not bundle). Install a non-assigned wire
on both sides of the protective conductor.
;
The flow and return circuit must be twisted when the lines are not shielded, in
order to dampen common-mode noise.
;
Further informations are found in the instruction manual part 2/3.
1) Mains Fuse
2) Main Protection
3) Line Reactor
4) Interference Suppression Filter
(if not already installed)
5) Inverter with Braking Resistor
6) Motor Choke or Output Filter
7) Motor
1)
2)
3)
4)
5)
6)
7)
M
3~
PE
L1, L2, L3
3.2 Installation