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Technical Documentation
Rev. 01
Power Factor Regulator
BLR-Q(U)
Page 10 of 39
2.2 HARMONICS
The BLR-Q(U) is permanently calculating the harmonics of the voltage and current by
using Fourier transformation. After selecting the submenu these values are displayed
separated in even and odd harmonics of current and voltage in main display area. Every
displayed value is related to the fundamental wave.
Selection can be done by pushing the ◄►-key.
Scrolling is possible by pushing the ▲ / ▼-keys.
2.3 STEPINFO
Stepinfo shows the information, which is saved in step database. By pushing
+
-key, the
step can be selected. By pushing ▼-key, the different saved values can be selected.
These values are: type of step, switch cycles, actual capacitor size and derating of capaci-
tor in percent.
2.3.1 STEP TYPE
Different types of steps are possible. With exception of the type
FAULTY
, the types can be set in
SETUP/STEPS (2.4.22.2).
Possible types are:
•
NORMAL = step is used for normal regulation
•
FIX-OFF = step is permanently switched-off
•
OFF = step is permanently switched-off an blend out
•
FIX-ON = step is permanently switched-in
(step will be switched-off in critical situations like over- and undervoltage,
overtemperature or excessive harmonics)
•
FAST = step is used for real-time algorithm. More information can be found in
chapter 2.4.22.2 and 2.4.23.
•
FAULTY = the step is detected as defective and is blocked
2.3.1.1
FAULTY STEPS
The detection of faulty steps is only possible, when the automatic step recognition is active (2.4.23.5) and
switch cycle is at least 1 sec. When switch cycle is less 1 sec step recognition is automatic off. A step is
“FAULTY”, when BLR-Q(U) cannot detect any change of reactive power at three switching operations in
series of this step.
Faulty steps are signed with "F!" in the status columns. Furthermore the step type "FAULTY" is shown. De-
fective steps are blocked for the regulation. Faulty steps can be reset in SETUP/RESET (2.4.28.2), by inter-
ruption of supply voltage of BLR-Q(U) or automatically after 24 hours. Afterwards the step is used again for
its regular control function.