cables can be connected to each PQFM from the top or the bottom. Note that if the "top
cable entry option" has not been installed, the customer has to make a cable pass
through in the filter roof and protecting grid. In order to do this, remove the roof by
unscrewing the lifting lugs. Optionally, each cubicle can be equipped with a cable pass
through for top cable entry. Also an extra cable entry cubicle (W x D x H: 600 x 600 x 2150
mm) may be provided for single cable entry point (multi-unit filters).
A filter panel (consisting of one or more power units) can be installed against a wall or
back to back to other cubicles providing that the heat transfer from the other cubicles
to the filter cubicle is negligible. If a high heat transfer is expected, a spacing of 100 mm
between the filter panel and the wall or the other cubicles is recommended.
Figure 14
shows a top view of a typical PQFM installation with indication of the cubicle fixation
holes. For fixing the cubicle to the floor M12 bolts and washers are recommended.
Note: A tolerance between 0 and 6 mm is applicable on all dimensions given.
Figure 14 Top view of a typical PQFM installation with indication of the fixation holes
For systems with more than 1 cubicle, the cubicles can optionally be mounted on a
common base frame of 100 mm height. Standard dimensions for PQFM filters with up
to 3 power units are shown in
Figure
15.
34 Mechanical design and installation ç Manual Power Quality Filter PQFM