capacitor operations
capacitor operations
(OP)
can any one explain me what will happen when i used capacitor for improving my lagging power factor during running process of induction motors capacitor operates but when machines shut down capacitor should aslo be shuted but what will happen if all capacitor will remain on even the plant is in running or shuted i know it will be capacitve load but does it effect my utility bills?






RE: capacitor operations
RE: capacitor operations
RE: capacitor operations
A much better approach is what is called "At Load" PFC correction, where you mount the caps close to the motor so that they only come on when the motor is on. You must be careful with that on motors controlled by soft starters, they need separate capacitor control contactors, but that's not too difficult.
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RE: capacitor operations
Another benefit of "At load" correction is the fact that reactive current won't flow upstream the motor cubicle, while with "Bulk correction" it will flow through all cables downstream of PCC (where bulk capacitor is connected), hence causing greater voltage drops and losses, as well as reduction in capacities. Why there is a bulk correction at all? Because it is usually cheaper than "at load" for same amount of total kvar installed.
Another important aspect is fixed or automatic correction choice. For variable loads there is a greater chance to over compensate with fixed banks connected.
RE: capacitor operations