APCQ CAPACITOR BANKS
STATUS
Approved
SECURITY LEVEL
Public
DOCUMENT ID
9AKK107680A4136
REV.
E
LANG.
en
PAGE
23/47
© 2022 Hitachi Energy. All rights reserved.
WARNING:
When connecting the CT(s), the secondary terminals of each CT have to be shorten. Failure to
do so may result in CT destruction and consequent damage to the installation. Once the connections to the
APCQ capacitor banks have been made, remove the short circuit.
WARNING:
CT can be connected to several equipment BUT must be in series.
CT must be connected to CT’s terminals as per
and
The CT terminal block can handle control cable wiring with sections from 0.75 mm² to
10 mm².
Run CT cables inside the cubicle. The cables can be installed in the cable duct fixed on the left of the cubicle.
CT’s are normally marked P1/P2 and S1/S2 and should face the supply transformer while P2 the load side.
S1 control wires terminal goes to terminal marked
k
and S2 to terminal marked
l
.
Note: A gray jumper is provided with the bank in a small plastic bag. Use this gray jumper in case shorting of
the CT secondary winding is required (e.g. RVC/RVT controller removal). As long as the RVC/RVT controller
remains wired to the capacitor bank, the gray jumper must be removed for proper operation of the bank.
5.4.10.
Multi ratio CT and summation transformer
When a multi ratio split core CT is used the appropriate ratio is selected by connecting either S2 or S3 or S4 to termi-
nal marked
l
. The CT ratio should be selected as close as possible to the requested CT specification.
Figure 26: Multi ratio CT
Sommation transformer
For more complex situation (i.e.: two or more power source connections) the current has to be measured in different
points in order the APCQ capacitor bank receives correct measurement in any circumstances.
Then, when several CT’s are requested, one or several summing transformer should to be used.
When a summation current transformer is used the terminal markings will usually be P1, P2, P3, P4 and S1, S2. The
secondary connections S1 and S2 should be connected to
k
and
l
respectively as before.
