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Technical Documentation
Rev. 01
Power Factor Regulator
BLR-Q(U)
Page 23 of 39
2.4.23.10 CONTROL
Four control modes can be selected:
AUTO:
“Best Fit“
LIFO:
“Last in, first out“.
1. Threshold level of each step is checked separately. If steps have different
sizes, this can cause inaccuracy.
2. Step recognition is working in this mode as well, when it is active. If steps
are detected as defective, they are skipped in this mode. If this is not ac-
cepted, the step recognition has to be set “OFF” and capacitor sizes have
to be programmed manually.
Combi - Filter:
This setting assures that in combined filters the connected power with higher degree
of choking is higher as the power with lower degree of choking.
Capacitors with higher degree of choking must be connected to the odd exits.
Capacitors with smaller degree of choking must be connected to the even exits.
Progressive:
If more than one step is needed to reach target, the setting of switch interval is only
valid for the first switching operation and the following steps are connected in short
intervals.
2.4.23.11 Q OFFSET
OFFSET of reactive power in kvar. This feature allows compensating a permanent reactive load, which can-
not be measured (e.g. a transformer).
The offset of reactive power affects the readings of the following measuring values:
current, reactive power, control deviation, apparent power, power factor PF and cos
ϕ
ϕ
ϕ
ϕ
.
2.4.23.12 I < LIMIT FREEZE STEPS
Yes:
If current is detected as zero, the regulator is freezing all the steps until it can measure current again.
No:
If current is detected as zero, the regulator is switching-off the capacitors step by step with intervals of
30 sec, to check for a broken cable until it can measure a current again.
2.4.23.13 Q CAPACITIVE STEPS TURN OFF
Disconnecting capacitors in leading power factor condition.
2.4.23.14 Cos phi control
Switch on or off voltage control
COS PHI : U control reactive power depending on the voltage
COS PHI : P control reactive power depending on the load
NO : standard power factor control
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