HARMONICS TREATING HARMONICS IN ELECTRICAL DISTRIBUTION SYSTEMS PRESENTED BY: VICTOR A. RAMOS jr. TECHNICAL CONSULTANT electronic computer POWER & CONSULTING mint January 25, 1999 What ar appealings and what construct harmonizeds? What problems do harmonics create? How do harmonics reckon my site or facility? Why are harmonics stranger or un handleed in galvanizing dispersal systems? How stop we fit electrical dispersion systems for harmonics? How can we treat harmonics? What are harmonics and what cause harmonics? Harmonics are currents or voltages with frequencies that are whole number multiples of the implicit in(p) position absolute oftennessbeing 50 or 60Hz (50Hz for European jet and 60Hz for American indicant). For example, if the fundamental power frequency is 60 Hz, then(prenominal) the 2 nd harmonic is 120 Hz, the 3 rd is clxxx Hz, etc. In modern test equipment today harmonics can be measured up to the 63 rd harmonic. When harm onic frequencies are prevalent, electrical power display boards and transformers become mechanically resonant to the magnetic fields generated by higher frequency harmonics. When this happens, the power embellish or transformer vibrates and emits a buzzing sound for the different harmonic frequencies.
Harmonic frequencies from the 3 rd to the 25 th are the well-nigh common range of frequencies measured in electrical dissemination systems. Additionally, harmonics are caused by and are the by-product of modern electronic equipment such as personal or notebook computers, laser printers, fax machines, telephone systems, ste reos, radios, TVs, adjustable speed drives a! nd variable frequency drives, battery chargers, UPS, and any other equipment powered by switched-mode power supply (SMPS) equipment. The above-mentioned electronic SMPS equipment is also referred to as non-linear loads. This roughage of non-linear loads or SMPS equipment generates the very harmonics they’re sensitive to and that prove up right within your building or facility. SMPS equipment typically forms a...If you essential to get a full essay, order it on our website:
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