Selecting The D U /D T Filter; Contents Of This Chapter; Filter Selection Procedure; Applicability Checks Of The Pre-Selected Filter - ABB FOCH Hardware Manual

Selecting the d u /d t filter

Contents of this chapter

The chapter instructs in selecting a d u /d t filter for your drive.

Filter selection procedure

Step What to do
1 Check whether a d u /d t filter
is needed in the installation.
2 Pre-select a filter according
to the drive type.
3 Check that the pre-selected
filter is suitable for your ap-
plication.
1) For the ACS880 drives, the data can be found either from the appropriate Technical catalog or Hardware manual.
The PDF files are available at www.abb.com/drives.
2) FOCH0260-7x cannot be replaced with a bigger filter due to the higher inductance in the FOCH0260-7x.

Applicability checks of the pre-selected filter

Long or several parallel motor cables, or special cable types may cause additional
temperature rise in the filter. Therefore, check that the filter selected on the basis of
the filter selection table fulfils the application requirements:
• The motor cable is not longer than the maximum allowed motor cable length given
in the drive hardware manual.
• The energy loss in the d u /d t filter is not higher than the maximum allowed value
( E ) given in subsection
max
is calculated as follows:
More information
The requirements are specified in the drive hardware manual.
See chapter Planning the electrical installation.
Filter selection tables are in the drive hardware manual.
See section Applicability checks of the pre-selected filter.
If the checks are passed, use the pre-selected filter. If any of the
conditions is not met, choose a bigger filter, use two filters in
series or change the motor cabling.
Maximum values table (page 14)
Selecting the d u /d t filter 13
3
1)
2)
below. The energy loss
1)