Technical Documentation Rev. 01
Power Factor Regulator BLR-Q(U) Page 5 of 39
1 Installation and Connection
Only qualified staff is allowed to perform the installation. All legal rules have to be ob-
served and technical standards have to be met. Before connecting the device check that
all connecting leads are de-energized and that current transformers are bypassed.
1) Compare auxiliary-, measurement-, ontrol voltage, frequen y and the urrent path of the
devi e (see type label) with the data of the ele tri ity network.
2) Assemble the relay in the swit h panel with the 2 mounting lips. If the devi e is not fitting in
the utout the small plasti bars on the side of the ase an be removed with a knife.
3) Conne t prote tive ground to the terminal link of the ase.
4) Conne t in a ordan e to the wiring diagram (see hapter " onne tion"). Pay spe ial atten-
tion to the ross se tion size of the CT onne tions! An integrated voltage observation with
regard to the auxiliary voltage in BLR-Q(U) guarantees a safety dis onne tion of the apa i-
tors in ase of undervoltage. It must be ensured, that auxiliary voltage is taken from the iden-
ti al phase as ontrol voltage for the onta tors, to guarantee that all swit hing elements are
safely swit hed off in ase of under voltage.
5) Remove short ir uit links of the urrent transformer before ommissioning!
1.1 Auxiliary voltage
At BLR-Q(U) auxiliary voltage has to be onne ted separately from measuring voltage. The terminals for
auxiliary voltage are marked with La, Lb and 0.
Terminal 0 has to be onne ted always. La and Lb are different tapping points of the transformer to allow the
usage with different voltage levels. The detailed onne tion depends on the devi e type and an be seen on
the sti ker at the rear side of the regulator.
1.2 Current measurement
BLR-Q(U) an be used in ombination with x/5Amp urrent transformer as well as with x/1Amp types. The
terminals for CT onne tion are marked with K (S1) and L (S2). CT has to be mounted in the way, that K
(P1) onne ted to the feeder from utility and L (P2) is onne ted to load.
Current measuring is ne essary for al ulation of ontrol deviation and apa itors sizes for rea tive power
regulation as well as for showing and monitoring different measuring values.
BLR-Q(U) an be used with summation transformer as well. To get proper fun tion, please pay attention to
orre t polarity of all CTs and to the orre t setting of CT-fa tor. The CT-fa tor for a summation transformer
an easily be al ulated by adding the single transformer ratios (e. g. 1000A/5A + 1000A/5A + 1000A/5A =
200 + 200 + 200 = CT-fa tor 600).
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