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We have a bank capacitor rating of 60 KVAR for a overall
load of 160 KVA and we have connected three loads of 50KVA
each. We would like to auto matically correct PF using APFC.
How do we design it?
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Answer Posted / rachuri_sree
APFC panel should be connected to main incoming busbar i.e.
from where 160 kva load was fed. 60 kvar capacitors should
be devided into smaller capacities i.e you have to use
either 6x10 kvar or 4x 15kvar or 10x6kvar. I will consider
6x10 kvar. in APFC you have to programe each stage
capacity. here the value is 10 kavar. You have to take 6
no. of capcitor switching duty contactros and to be wired
as per the APFC. It also requires one CT signal and voltage
signal(any one of the three phases of main busbar). You can
program s/on and s/off time in APFC. and also you can
program target power factor. EPCOS apfc is the best
controller I have used.
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