Manual Ct Detection Procedure; Pqf Connection Diagram - ABB PQFS Installation, Operation And Maintenance Instructions

NOTE: When the automatic CT detection procedure is started, the filter will
automatically deactivate all user requirements for filtering, reactive power
compensation and balancing. After the procedure has finished, the user has to
reprogram these parameters into the filter.
8.6.2

Manual CT detection procedure

Refer to
setup.
The following procedure will allow you to check the CT connection. This step only has to
be executed if the CT setup could not be detected automatically. For filters consisting of
more than one unit, it is necessary to check the CT connections for each individual unit.
WARNING: The secondary circuit of a loaded CT must never be opened. Otherwise
extremely high voltages may appear at its terminals which can lead to physical
danger or destruction of the CT.

8.6.2.1 PQF connection diagram

Figure 77
must be noted that:
Supply side
K = P1, L = P2, k = S1, l = S2
116 Commissioning instructions ç Manual Power Quality Filter PQFS
Section 7.7.2.3 for guidelines on how to enter data when using the manual CT
shows the standard connection diagram for the PQF (Cf.
· L1, L2 and L3 rotation must be clockwise
· The CTs must be on the supply (line) side of the PQF
· The CT monitoring a phase must be connected to the filter CT terminal dedicated
to the same phase
· One secondary terminal of the CT must be earthed
L1 K L
L2
L3
k l
N
To X21.1/X21.2
Figure 77: Basic CT connection diagram
K L
K L
k l
k l
To X21.5/X21.6
To X21.3/X21.4
Section
Load side
N L1 L2 L3
X21.1
X21.2
X21.3
PQF
X21.4
X21.5
X21.6
7.7.1). It