Danfoss VLT AAF00x, Руководство по эксплуатации

Страница: 31 / 103

M M
M
PCC1
PCC2
130BB511.11
AAF
Illustration 4.30 Current transformers installed in front of entire
installation and filter is compensating all loads on the
transformer. CT on PCC side.
M M
M
PCC1
PCC2
130BB512.10
AAF
Illustration 4.31 Current transformers are installed in front of
distribution bus 2 and one frequency converter and the filter
only compensating currents for those. CT on load side.
If the CTs are installed on the secondary side of the
transformer and so in front of the entire load, the filter will
compensate all loads simultaneously. If as in
Illustration 4.31 , the CTs are installed in front of only some
of the loads, the filter will not compensate unwanted
current deformation of the frequency converter and motor
on the right hand side. If CTs are installed in-front of a
single load the filter will only compensate the one load
and so form individual load compensation.
The filter can be programmed to have CTs installed on
source side also called point of common coupling (PCC) or
alternatively at the load side. This has to be programmed
via
300-26 CT Placement
NOTE
The filter will as standard be programmed to PCC side
installation
PCC1
AAF
M M
M
130BB513.11
Illustration 4.32 Current transformers installed on source (PCC)
side for group compensation.
How to Install VLT Active Filter AAF 00x
30 MG.90.V2.02 - VLT® is a registered Danfoss trademark
4 4