Magnetek HPV 900 Series 2, Техническое руководство

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APPENDIX
– CE Guidelines
171
Wiring External to the Enclosure
To help comply, the treatment of cables is the
most important countermeasure. The
grounding and the treatment of gaps in the
external connection sections between the
control panel and the machine are also
important. It is recommended that the OEM /
installer examine the present structure of all
cable entrances.
Screened/shielded cable must be used for the
motor cable (20 meters, 65 feet. max). The
screen of the motor cable must be grounded at
both ends by a short connection using as large
an area as practical. The output lead section of
the control panel should be treated to minimize
leakage of RFI by eliminating clearances. The
grounding surfaces should be metal
conductors (steel solid or flexible conduit) and
conductance should be assured by the
following:

Ground the connectors at both ends.

The motor should be grounded.

Flexible conduit (metallic) connected to a
junction box should be grounded.
Group the wiring external to the enclosure into
six separate steel conduits:
1. AC main input power,
2. AC control input power,
3. output to the motor,
4. motor encoder/thermistor wiring,
5. low voltage control including analog and
digital inputs and outputs,
6. dynamic braking resistor.
Wiring Internal to the Enclosure
The most effective treatment for cables is
shielding. Screened / shielded cable is
recommended within the control panel. Use
cables with a woven screen. The screen of the
cable should be securely grounded using the
largest area and shortest distance practical.
Shield terminations must be as short as
possible. It is recommended to ground the
screen of the cable by clamping the cable to
the grounding plate.
Panel Layout
The line filter and the drive must be mounted
on the same metal panel. The metal panel
should be securely grounded. The filter should
be mounted as close as possible to the drive.
Power cables should be kept as short as
possible.