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2.2 HARMONICS
The BLR-CM 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 fun-
damental 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 capacitor 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 (2.5.4.2).
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 har-
monics)
FAST = step is used for real-time algorithm. More information can be found in chapter 2.5.4.2 and 2.5.5.
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 (2.5.5.7) 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-CM 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. Defective steps
are blocked for the regulation. Faulty steps can be reset in SETUP/RESET (2.5.10.2), by interruption of supply voltage of
BLR-CM or automatically after 24 hours. Afterwards the step is used again for its regular control function.
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