Solving power system harmonic resonance; improving power quality and eliminating electrical failures

Abstract: An Electrical Arc Furnace in the vicinity of a hyperactive railway traction line was facing an unusual power quality harmonic distortion problem. The Gigantic 22kA copper bus bar used to overheat visibly red-hot, vibrate audibly loud loosening its nuts and bolts and wear out the bus bar's affected plates.

Problem of electrical blast from VFD harmonics; and a methodology for trouble shooting and increasing productivity

 Abstract - An IPP with a 25mw power plant and a 5000TCD sugar milling unit was facing a power quality harmonic distortion problem that starting with occasional tripping of its power plant eventually forced it to shut down its operation for several days. It had completed its first anniversary without any harmonic problem but during its 2nd years of operation it started off with a massive blast of a 6300A incomer ACB at the power plant's auxiliary PCC panel. Within a span of next 4-weeks it blasted off one by one several other switch gears, ACBs and MCCBs.