KMB NOVAR 2600, Руководство по эксплуатации

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NOVAR 2600 Operating Manual
4. PFC Block
4.1 Basic Functions
NOVAR 2600 power factor controllers are fully automatic instruments that allow optimum control of
reactive power compensation.
Control is provided in all four quadrants and its speed depends on both control deviation value and its
polarization (overcompensation / undercompensation). Connecting and disconnecting power factor
capacitors is carried out in such a way that achieving the optimum compensation condition is by a
single control intervention at minimum number of sections connected. At the same time, the
instrument chooses relay sections with regard to their even load and preferably connects those that
have been disconnected for the longest time and the remanent charge of which is thus minimum.
Within the control process the instrument continually checks the relay compensation sections. If a
section’s outage or change in value is detected, the section is temporarily disabled from control under
relevant setting. The section temporarily disabled is periodically tested and enabled for control again
when possible.
Wide assortment of the instrument's alarms can be used both for indication and protection of the
compensation elements. It is, for example, possible to preset the THD and the CHL threshold levels at
which the controller disconnects all compensation sections thus preventing their damage. Besides
that, the most adverse values are recorded into the instrument’s memory for subsequent analysis.
Besides the power factor capacitors, it is possible to connect power factor chokes (power system
decompensation). Any output can be set as fixed, the three highest outputs can also be used as alarm
output or to connect the cooling or heating circuits.
The controllers can be equipped with different numbers of outputs up to 18.
4.2 Manipulation and Setting
4.2.1 PFC Screen
For power factor control checking, special PFC screen serves. It gets complex and well-
arranged information about the compensation system actual state.
To show the screen, select appropriate icon from the Main Menu .
The PFC screen comprises following groups :
• outputs state … actual state of the outputs
• PF gauges … gauges indicating actual single-phase and three-phase power factor values
• actual data&status panel … multifolder panel with all of quantities' actual values necessary
for power factor control checking
• event indicator … indicates important events (flashing)
• actual temperature panel … actual internal & optionally external temperature
• reactive power deviation flags … individual phase & total three-phase PF-control deviation
flags combined with control time bargraph(s)
• toolbar … determines actual function of individual buttons
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