Reference Manual
BLR-CM/BLR-CM3phase
Rev. 08
2018-09
11
2.3.2 SWITCH CYCLES
BLR-CM is counting and showing the switching cycles of each step. This value allows the conclusion about the actual
state of the contactors. Switch cycles can be preset separately for each step in SETUP/STEPS (2.5.4.3). Switch cycles of
all steps is also reset, by a reset of complete capacitor database in SETUP/RESET (2.5.10.3).
2.3.3 STEPVALUE
As standard, the STEPVALUES are detected automatically during operation. They are rated to the setting of nominal
voltage. In some special applications, it is required to set the step values manually. This can be done in SETUP/STEPS
(2.5.4.4).
The STEPVALUE is showing the size of the capacitor, which is used for reactive power regulation. The function of this
value can be compared with the c/k value of power-factor control relays of former generations. The STEPVALUE is shown
in kvar. Each step has its own STEPVALUES, at BLR-CM it’s one per step, at BLR-CM3phase there are three step values
per step (one for each phase). Step database is working with two values of capacitor size. The value which is shown in
kvar is the actual value. This is continuously corrected with every switching operation. A second value is saved after the
first ten switch cycles of each step after a reset of step database. This value indicated the original available STEPVALUE.
This value is used to calculate the percentage of actual step value to original step value. This percentage gives very
simple information about derating of the capacitor banks.
When automatic step recognition is not active, the percentage is not shown (2.5.5.7).
2.4 Quickstart SETUP
In this submenu basic settings can be made for the BLR-CM. These settings are necessary for correct function and for
correct display of the measurement values. This menu can be entered without password.
The following parameters can be set in Quickstart menu:
2.4.1 CHANGE LANGUAGE
Standard version of BLR-CM is supporting English, German and French.
2.4.2 NOMINAL VOLTAGE
Function of the setting of nominal voltage is to make a definition about the nominal voltage of the system. The thresh-
old levels for under- and overvoltage are based on this as well as the ratings of the capacitor sizes in step database,
which are used for control and monitoring (2.5.3.7 and 2.5.3.8). The capacitor sizes, which are stored in step database,
are also rated to the nominal voltage.
Independent of connection of the voltage measuring channel, nominal voltage is always the phase-phase
voltage!
!
