APQI India
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Case Study

Well researched and documented real-industry live case studies covering a wide rage of Industries and PQ issues from Asia on harmonic distortions, under-voltage and over-voltage, voltage dips, sags, flicker/sag/swell, transients, earthing, reactive compensation and so on , are available here for downloading. The case studies offer detailed analysis of the PQ issues ad solutions including economic analysis to enable users and top managements to readily go in for implementable economical solutions.

Energy Conservation Act 2001 provides a legal framework to embarking on energy conservation in India. Under the act government classified industries based on energy consumption and these industries are known as Designated Consumer (DC).   These DC’s are covered under Perform Achieve ...
With rising cost of energy and environmental concerns, energy saving is need of the hour. In order to reduce operating cost installation of variable frequency drive on variable load is proven energy saving measure. VFDs in market are generally based on six pulse rectification topology. Due to the fa...
A leading hospital in southern India faced chronic problems in terms of humming noise in capacitor bank, its failure, high temperature in transformer, and disturbances on the monitor of ultra sound machine. In order to rectify these problems hospital management carried out power quality study. Durin...
An engineering company in western India opted to address power quality issues in the green field project. For a heavy engineering company engaged in manufacturing of turbine power quality becomes very important as the raw material is very costly. Apart from using costly raw material the process is v...

A large Industry involved in the melting of iron for making castings and machining them uses the Induction furnaces as well as other equipment. The industry desired the Institute to undertake power and energy audit studies of their plant during 2010-11 period. The 110KV grid power supply to this ...

A booster pumping station (BPS) in South India with high power HT pumping motors reported sudden failures due to flashover of the current limiting reactors of the PF correction capacitor circuit. The pumping circuit has its own power factor correction capacitor circuits. The failures were reporte...

Abstract

Wind mills are increasingly becoming an alternative generating source to fulfill the ever increasing need for electricity inIndia.Indiais currently fifth largest country in the world in terms of wind generating capacity concerned. Critical issues af...

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Large continuous process plants are increasingly resorting to use of non linear loads (NLL) such as DC drives, variable speed AC drives, UPS, increased electronic controls etc. to improve performance and productivity of their plants. The plant...

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Power quality is of major concern to most of the industries, especially those operating with critical electronic controller oriented machinery and equipments. Poor quality of power leads to major problems like unexplained breakdowns, production inte...

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Large corporates before setting a new plant in an industrial locality would like to be sure of power quality of the electricity supplied by the utility. Especially when the supply is at extra high voltage level of 230 kV, which is availed by a few c...

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Electrical systems in high rising office building play an important role in day to day to functionality because of application of various electrical utilities like lighting, air conditioning, water pumping, office equipment (computers, printers, fax...

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While Indian garment business is generally regarded as one of the countries benefited due to phasing out of quotas, there will be winning and loosing enterprises. This transformation might have negative impact, especially if the trend toward...

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This Power Quality survey was conducted in a leading textile mill at southIndiamanufacturing various counts of yarns. The industry had added number of variable frequency drives for enhancing efficiency and also to have better process control.

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In this case study a world leader in a non-ferrous metal industry engaged in manufacturing of ACSR conductors for HT & EHV electrical power transmission & distributions had been facing high incidence of operational problems across its plants...

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A call centre in a metro city was faced with problems of unreliable operation due to higher degree of harmonic amplification with the existing APFC Capacitors, which caused its frequent failures. The standard, unchoked capacitors in the APFC System ...

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A leading tyre manufacturing company inIndiawas facing PQ problems due to lower factor of the system due to non-linear loads present in the system.

A leading tyre manufacturing company inIndiawas facing problems ...

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An Indian health centre located in a metro city was faced with problems of high kVA demand (beyond the contracted demand with the utility), low power factor, etc., resulting in high energy bills. After a detailed study and analysis of the key parame...

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The DC drives with six-pulse rectifier, generate significant 5th and 7th harmonics and appear as a stress and skin effect on cable leading to insulation failure. A generally accepted method of coping with thes...

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A sophisticated, state-of-the-art data centre calls for a highly secured physical environment in addition to reliable power supply/uninterrupted signal transmission. There has to be round-the-clock restricted access with...

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The communication equipments are increasingly sensitive to power quality issues especially in terms of performance, requiring following of various international standards and procedures in dealing with grounding issues a...

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Whenever plant undergoes modernisation, basically several types of non-linear loads are added newly in the process fresh PQ audit would help in identifying areas of concern. The location of non-linear loads play a vital role, which may yield even fu...

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Power Quality is a measure of an ideal power supply system. The most obvious defects in power supply system are complete interruption (which may last from a few seconds to several hours) and voltage dips or sags where th...

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The modern electronic controllers are added in the industries for having refined control for the process and enhancing the efficiency of the system. These are also added as retrofit in subsequent years to operationalizat...

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The case study looks into the effect of poor power quality and harmonic distortion resulting in disturbances like, overheated cable, temperature rise in transformer and spurious breaker trippings at a sponge iron manufac...

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