SATEC C192PF8-RPR - Manual (Page 56)

Chapter 5 PFC Setup and Operation 51
The C192PF8-RPR allows you to choose between manual and automatic
adjustment of the capacitor bank powers. If you choose to make this manually,
specify the bank nominal voltage in the PFC setup as zero, and then enter the
reactive powers for each bank being recalculated for the operating voltage of the
banks, as follows:
2
2
Vn
V
Qr Q =
where:
Q - reactive power of the bank, kvar
Qr - rated reactive power of the bank, kvar
V - operating voltage, V
Vn - nominal (rated) voltage of the bank, V
If you allow for automatic adjustment of the bank powers, specify in the PFC
setup the nominal voltage of your capacitor banks and the individual rated power
for each capacitor bank. PFC will automatically account for the measured
operating voltage to adjust the capacitor bank powers.
5.2.5 Relay Operation (Switching Cycle) Counters
In all modes of operation, the PFC tries to equate cycling for the banks with the
same size. Whenever a number of the banks with the equal power are available,
the PFC will use the bank that has the minimum number of switching cycles.
In order to control cycling of the capacitor banks and the contactors used for
capacitor switching, the PFC maintains the individual operation counter (switching
cycle counter), for each output relay. The cycle counter contains the number of
complete switching cycles of the bank. The PFC updates the counter when it
switches in the corresponding bank.
The present status of the cycle counters can be inspected through the Status
Information Menu (see Chapter 7) or via communications. Each counter can be
cleared individually or all counters together by a single operation (see Section
4.11 and Chapter 7).