Magnetek HPV 900 Series 2, Техническое руководство

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APPENDIX
– CE Guidelines
170
Appendix
CE Guidelines
Below are guidelines for CE compliance.
Standards
EN 12015
Electromagnetic compatibility
Emission
EN 12016 Electromagnetic compatibility
Immunity
Recommended Line Filter
A line filter must be connected between the
main power supply and input three phase input
terminals to comply with the standards listed
above.
Installation Guidelines for EMI/RFI Issues
The HPV 900 Series 2 drive should be
installed in a control panel or metal enclosure.
Enclosure manufacturers’ designs vary and it
is not the intent of this document to cover all
designs. Some designs require different
countermeasures than other designs. This
paper covers only the general points of
enclosure design when the HPV 900 Series 2
drive is used.
Countermeasures For the Enclosure
Radio frequency interference of various
wavelengths emitted by electrical components
are scattered randomly inside a control panel.
This RFI induces noise on the cables within
the control panel. When these cables are led
out of the control panel, the cables containing
the RFI noise act as antenna and radiate noise
externally.
If drives or other control equipment are
connected to a power supply without using a
line filter, high frequency noise generated in
the equipment can flow into the power supply.
Problems related to these emissions include:

Radiated noise from the electric
components inside the control panel or
from the connecting cables.

Radiated noise from the cables leading out
of the control panel.

Conducted noise and radiated noise (due
to conducted noise) flowing from the
control panel into the main input cables.
The basic countermeasures against the above
conditions include modification of the control
panel structure. Using EMI gaskets, ferrite
cores, shielded cable, and enhanced
grounding is also beneficial. The separation of
signal and power wires is essential.
To help comply it is necessary to prevent the
leakage or penetration of radio waves through
cable entrances and installation holes in the
enclosure.
Modifications to the enclosure include the
following:
1. The enclosure should be made of ferrous
metal and the joints at the top, bottom, and
side panels should be continuously welded
to make them electrically conductive.
2. The paint on the joint sections should be
removed back to the bare metal to provide
good electrical conductance.
3. Be careful to avoid gaps, which could be
created when panels become warped due
to over tightening of retaining screws.
4. The section where the cabinet and door fit
should have a ridged structure to avoid
any gaps where RFI may leak.
5. There should be no conducting sections,
which are left floating electrically.
6. Both the cabinet and drive unit should be
connected to a common ground.
Enclosure Door Construction
To help comply it is necessary to reduce RFI
by eliminating gaps around doors used for
opening/closing the control panel.
1. The door should be made of ferrous metal.
2. Conductive packing should be used
between the doors and the main unit.
Assure conductivity by removing the paint
on the sections, which contact the door.
3. Be careful to avoid gaps which could be
opened when panels are warped due to
the tightening retaining screws, etc.