power factor regulator or capacitance regulator

[cplai]

I'm looking for power factor regulator or capacitance regulator circuit for single phase electrical circuit with the maximum of 30 amperes , 60 ampers and 100ampres . The power factor circuit must be able to detect the various current flow i.e 10, 20 , 30 Amp for 30ampres circiut . and for 60amp circuit it must be able to detect i.e 15, 30 ,45 ,& 60 . Once the circuit detects the deferent level of load it should be able to switch on the relevent capacitor bank to regulate the capacitance prevent eccessive inductive load which may cause high reactive power (KVAr) . If power it must to detect whether the electrical circuit is over capacitive or not otherwise over capacitive will be the like over inductive .