Reference Manual
BLR-CX-R / BLR-CX-T
SYNCHRONISATION FREQUENCY
For a high precision of the measurement, the sampling rate has to be
synchronized to the frequency of the grid. Caused by commutation
notches of mainsvoltage it is possible that the automatic
synchronizing will not work reliable. This creates failures in
measurement. To avoid these problems, the following settings can
be done:
Automatic synchronizing:
For best measurement results, when mains voltage is without
commutation notches.
FIX-50HZ: For a safe operation at 50Hz grid with bad mains quality.
FIX-60HZ: For a safe operation at 60Hz grid with bad mains quality.
TEMPERATURE OFFSET (from software revision 1.04)
The temperature offset allows correction of temperature reading in
a range -10°C to +10°C.
6.3 300 Setup Control System
The items in the menu "control system" allow an optimization of the control or an
adaptation to specific site requirements.
Sensitivity is the switching threshold for switching-on or switching-
off the capacitors in percent (%). The range of the sensitivity can be
between 55% and 100% (factory setting is 60%. Due to this, the in
following explanation 60% is used.).
Sensitivity is used for two checks:
1. The controller is using sensitivity to check, if a switching
operation is necessary or if it’s possible.
If the demand for compensation is bigger as 60% of the
smallest for regulation available step, BLR-CM is selecting
from step database, if there are suitable steps to switch.
2. To avoid hunting, the controller is only using steps, which will
not overshoot more than 40% (100%-60%) of its size.
This is the setting for target cosφ1. It will be valid during normal
operation.
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