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From previous unit (if present)
Control board in the 'previous' unit
· The RJ45 control cable coming from the preceding filter unit is plugged in the left
· The RJ45 control cable leaving for the next filter unit is plugged in the right hand
· Repeat the same procedure for any other filters to be connected.
Notes:
· In the first unit of a filter system, the left hand RJ45-socket will always be empty.
· In the last unit of a filter system, the right hadn RJ45-socket will always be empty.
· During the commissioning phase, a unique address has to be assigned to each
6.11.3
CT cable interconnection
WARNING: Failure to connect the CT's to all units in a filter system in an
appropriate way will result in filter malfunctioning and possibly sever damage of
the unit.
In a multi-unit PQFS-system, all units have to be supplied with the CT –measurement
results. In order to do this the CT's have to be cabled to each unit in a daisy chain
fashion. The connection principle is shown in
to four filter units. The same approach has to be implemented for the other phases too.
Figure 46: Control board interconnection cable connection method.
hand side RJ45-socket at the top of the filter control board.
side RJ45-socket at the top of the filter control board
unit in a filter system through dip switch. (see
Manual Power Quality Filter PQFS ç Electrical design and installation 53
Control board in the 'next' unit
Chapter
8)
Figure 47
for the CT of phase which is fed
To next unit (if present)
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