Novar 1xxx KMB systems
23
1. step number in format APnn
APnn APnn
APnn (Automatic Phase detection, nn... attempt number)
2. attempt result, e.g. L1-0
L1-0L1-0
L1-0 (see Table 4.4 for connection methods)
If the controller measures identical values repeatedly in each attempt, it considers the connection
detected and quits carrying out further steps. If the measurement results are different from each other
in a particular step, the controller carries out another measurement step.
The following conditions must be met for successful automatic connection configuration detection
process:
• type of measurement voltage is set correctly (phase, “LN” or line, “LL” – parameter 15)
• at least two power factor capacitors are connected to sections 1 through 4 and no power
factor choke is connected to these sections
The controller measures the measurement voltage value for the whole of the automatic connection
configuration detection process. It evaluates this voltage’s average value at the end of the process
and selects the compensation system nominal voltage U
NOM
(parameter 18) as the nearest value of
the following choice of nominal voltages.
Table 3.1: choice of nominal voltages
58 V 100 V 230 V 400 V 500 V 690 V
Type of connection detected is shown on the numeric display for a moment after successful
completion of the automatic connection configuration detection process, the selected U
NOM
nominal
voltage, the true power factor value in the power system, and thereafter the instrument starts the
control process or it starts the automatic section power recognition process (see further below).
If the automatic connection configuration detection process is not completed successfully, the numeric
display shows flashing P=0
P=0P=0
P=0. It is, in such a case, necessary to enter the type of connection manually
or to re-enter
----
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(= not defined) in editing parameter 16 and thus restart the automatic connection
configuration detection process. Otherwise the controller changes over to a waiting mode and it
repeats the automatic connection configuration detection process in 15 minutes automatically.
If the actual nominal voltage in the compensation system differs from the value selected and entered
in parameter 18 in the automatic connection configuration detection process, the parameter can be
corrected to its actual value when the process has finished.
The automatic connection configuration detection process can be interrupted at any time by switching
the numeric display mode to Parameters. The automatic connection configuration detection process
will start again from scratch on return to instantaneous value display mode.
3.3 Automatic Section Power Recognition Process
The controllers come with enabled function of automatic section power recognition process (parameter
20 set to A) as default setting. The controller starts the automatic section recognition power process
on powerup (connection of power supply voltage) with this setting, provided none of the outputs (in
parameter 25) has a valid power value; this happens if a new controller is installed for the first time or
after its initialization). The process can also be started without interrupting the power supply voltage
connection, by editing parameter 20 to value 1 or by controller initialization (see further below).
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