| |
INCREASED POLLUTION IN THE PROTECTIVE EARTH
| [View]
[Download]
|
| Author(s) |
A. Larsson; M. Lundmark; J. Hagelberg |
| Abstract |
EMC has received increasing interest over past decade. Several standards regarding
EMC have been developed. Although manufacturers design and manufacture interference-free
equipment in accordance with standards, disturbances are still a problem. According to the current
EMC legislation, conducted emissions are to be measured using a LISN between the utility
grid and the equipment under test. However, it should be noticed that there is no correspondence
between the EMC environment measured at an installation site and the EMC environment
measured by the LISN. In this paper some documented cases where electrical equipment are
disturbing each other are highlighted and EMC standards are discussed. In the paper it is shown
that EMC related problems occurring in the examples all have the same origin: current flow in
the PE. The leakage current is fed into the PE via the filters or by a capacitive coupling to the
ground. The increased use of power electronic equipment might lead to the need of a complete
re-build of the entire grid. An alternative solution to the problem would be to stop the leakage
current from being fed into the PE. |
| Download |
| Filename: | Unnamed file |
| Filesize: | 620.1 KB |
|
| Type |
Members Only |
| Date |
Last modified 2016-03-31 by System |
| |
 |