KMB NOVAR 2600, Руководство по эксплуатации

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NOVAR 2600 Operating Manual
4.3.3 PFC Alarm Setup
The controllers evaluate various nonstandard conditions ( such like measured quantities'
extreme values ) and, by the PFC alarm setting, various alarms can be activated.
Fig. 4.11 : PFC Alarm Setup – Main Level
Each of the alarms has two functions :
• alarm indication ( I )
• alarm actuation ( A )
If an indication function is set you need to set affected alarm outputs too, i.e. for each alarm event to
choose which alarm output(s) will be used for signalling of particular alarm event. Up to three alarm
outputs (AR1
÷
AR3) can be set and each alarm event can influence arbitrary combination of the
alarm outputs.
If the alarm indication is set and appropriate alarm condition keeps fulfilled for preset time, the alarm
indication gets active which means :
• flashing alarm indicator appears in the upper right corner of the PFC screen. In the info
folder of the data & status panel, the particular alarm specification appears – the active
indication alarm is framed ( for example
for the undercurrent alarm )
• if any of outputs is set as alarm output (see the output control state setup description above),
all of affected alarm outputs switch to preset active state that is indicated with corresponding
alarm output icon ( = open output; = closed output )
Unlike alarm actuation described below, the alarm indication function has no effect on the PFC control
process.
For most of the alarm events, you can set
the alarm actuation function too. The actuation means
intervention in the control process, mostly interruption of controller operation, usually with subsequent
disconnection of all compensation outputs and mostly fixed outputs too.
For phase-type control quantities (see further below), the alarm actuation works selective : if an alarm
condition appears at, say, phase L2 only, only compensation sections that have non-zero reactive
power component of L2-phase are disconnected. Other sections, such like C1, C3, C13 etc. type
sections (that have zero L2 reactive power component ) are not affected by the alarm activation and
they still stay used for power factor control process.
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