NOVAR 2600 Operating Manual
For now, only
the discharge time
parameters can be set individually for the two sets. There can be
more of such parameters in the next firmware versions.
4.3.2.4 Switching Mode
In most of applications it is recommended to let the controller to use the compensation steps during
power factor control process without any limitations. In such case, it optimizes usage of the outputs in
order to reach maximum whole compensation system lifetime.
In special cases you can force the controller to keep particular sequence of outputs' switching with
the
switching mode
parameter setting :
•
Intelligent
… No limitation for the switching sequence. The controller uses the outputs
optimally. Default, recommended for most of applications.
•
Circular
… In this mode the controller connects or disconnects compensation sections in the
circular fashion, which means:
•
always the ouput that was disconnected first (i.e. that is disconnected for the
longest time) is connected first
•
always the ouput that was connected first (i.e. that is connected for the longest time)
is disconnected first
This switching mode can be usually used only if compensation outputs of the same type and
power, otherwise power factor control process will not work optimally
•
Linear
… In this mode the controller connects or disconnects compensation sections in the
linear fashion, which means:
•
always the lowest in order not yet connected compensation section(s) is/are
connected
•
always the highest in order connected compensation section(s) is/are disconnected
This mode is determined for harmonic filters control. It is strongly recommended not to
activate linear switching mode at standard power factor compensation applications, otherwise
quality of control process will be decreased !
The sections with non-zero reactive power only that are
not permanently connected or permanently
disconnected or used for alarm, fan or heater control
are considered compensation sections involved
in the control process ( “control sections” ). That means that for both circular and linear switching
modes, when the controller selects next sections to be switched on or off, the remaining „non-control
sections“ are simply skipped.
When selecting the linear switching mode, the AOR is disabled and cannot be launched on - the
sections' types and powers must be set manually.
4.3.2.5 AOR – Automatic Output Recognizer
With the automatic output recognition (AOR) process, the controller can detect both the output types
( capacitor / choke, single/two/three/phase ) and their reactive power sizes itself, without having to
enter them manually.
The parameter setting options are :
•
Off
… The AOR process is never launched automatically
•
Auto
… The AOR process is launched automatically under certain circumstances ( see
below )
Furthermore, with the third option –
Run
– you can launch the AOR process manually (if all necessary
conditions are fulfilled ). By this, the basic parameter setting (either
off
or
auto
) stays unchanged –
the
run
is “single-shot” command only and doesn't change the AOR parameter setting.
The AOR process can be successfully launched under following conditions :
•
measurement voltage, at minimum value required, is connected
34
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Страница 89: ...NOVAR 2600 Operating Manual 8 Manufactured Models and Marking 89...