A ratio is unitless only if it is developed from terms of the same unit.It is ok and p.f is just a ratio and ratio is always unitless.

they also cancel each other, if you want I will do it.

we know that S = P only if p.f = 1 and here we have 0.9 not one.

it means 90% is real power and 10% is reactive power. So, since we multiply it by 0.9 it means we get pure real power without reactive. we know when there is no reactive, V-A = W.

So, 0.9 represent a ratio and I think it is correct. Am not I correct?

The unit cacels each other and we get proper unit ( W, V-A, Var)

When we discuss voltage drop and use an ohm per kft value. This is also a ratio, but of different units. So when we calculate, can we omit the units of this ratio.

Watts and volt-amperes are similar units but not identical units.

PS: Thread did not automatically close at 400 replies