Answer Posted / martin

This statement isn't entirely correct. Unity is the most
economical power factor. However, it is quite common that
the target power factor when correcting is say 0.98 - this
is to stop the power factor going past unity (i.e leading
power factor) as this is just as bad as having lagging
power factor and is not welcomed by electricity providers.
To combat this problem, automatic PFC equipment is used
rather than fixed banks of capacitors, so that a target
power factor is reached (as close to unity as possible) and
so that a leading power factor is also not achieved.

I can see why this question is being asked because there
seems to be some sort of myth to say unity isn't
economical. If someone can tell me otherwise, i'd be
interested to listen

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