Application Of Power Line Filter - Parker AC10 series Product Manual

Note:
Power source filter should be used in the equipment that may generate strong EMI or the
equipment that is sensitive to the external EMI. The power source filter should be a two-way low
pass filter through which only 50Hz current can flow and high frequency current should be
rejected.
Function of Power Line Filter
The power line filter ensures the equipment can satisfy the conducting emission and conducting
sensitivity in EMC standard. It can also suppress the radiation of the equipment.
Common mistakes in using power cable filter:
1. Too long power cable
The filter inside the cabinet should be located near to the input power source. The length of the
power cables should be as short as possible.
2. The input and output cables of the AC supply filter are too close
The distance between input and output cables of the filter should be as far apart as possible,
otherwise the high frequency noise may be coupled between the cables and bypass the filter.
This will make the filter ineffective.
3. Bad earthing of filter
The filter's enclosure must be earthed properly to the metal case of the drive. In order to be
earthed well, make use of a special earthing terminal on the filter's enclosure. If you use one
cable to connect the filter to the case, the earthing is useless for high frequency interference.
When the frequency is high, so is the impedance of cable, hence there is little bypass effect.
The filter should be mounted on the enclosure of equipment. Ensure to clear away the
insulation paint between the filter case and the enclosure for good earthing contact.
AC10 Inverter
TC-Hydraulik - Rüsdorfer Str. 8 - 25746 Heide - Lars Lornsen - T: +49 481 909 - 34 - l.lornsen@tc-hydraulik.de - www.tc-hydraulik.de
• Motor cable should be earthed at the drive side, if possible, the motor and drive should
be earthed separately;
• Motor cable and control cable should be shielded. The shield must be earthed and
avoid entangling at cable end to improve high frequency noise immunity.
• Assure good conductivity among plates, screw and metal case of the drive; use
tooth-shape/spring washer and conductive installation plate;

7.7.7 Application of Power Line Filter

Installation & Connection
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