Ct Cable Interconnection - ABB PQFS Installation, Operation And Maintenance Instructions

Figure 37: shows the way to interconnect the control boards.
From previous unit (if present)
Control board in the 'previous' unit
Figure 37: Control board interconnection cable connection method.
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The RJ45 control cable coming from the preceding filter unit is plugged in the left
hand side RJ45-socket at the top of the filter control board.
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The RJ45 control cable leaving for the next filter unit is plugged in the right hand
side RJ45-socket at the top of the filter control board.
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Repeat the same procedure for any other filters to be connected.
Notes:
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In the first unit of a filter system, the left hand RJ45-socket will always be empty.
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In the last unit of a filter system, the right hand RJ45-socket will always be empty.
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During the commissioning phase, a unique address has to be assigned to each
unit in a filter system through dip switch (see

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
filter units. The same approach has to be implemented for the other phases too.
54 Electrical design and installation  Manual Power Quality Filter PQFS
Control board in the 'next' unit
Chapter
Figure 38 for the CT of phase which is fed to four
To next unit
(if present)
8).