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Analyses of supply voltage quality, power consumption and losses affected by shunt capacitors for power factor correctionVinnal, Toomas; Janson, Kuno; Kalda, Heljut; Kütt, LauriPQ2010 : 7th International Conference "2010 Electric Power Quality and Supply Reliability" : June 16-18, 2010, Kuressaare, Estonia2010 / p. 53-60 : ill

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Analysis of power consumption and losses in relation to supply voltage levelsVinnal, Toomas; Kütt, Lauri; Kalda, Heljut6th International Conference "2008 Power Quality and Supply Reliability" : August 27-29, 2008 : Pärnu, Estonia : conference proceedings2008 / p. 23-28 : ill

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Analysis of power consumption and losses in relation to supply voltage quality [Electronic resource]Vinnal, Toomas; Janson, Kuno; Kalda, HeljutEPE 2009 : 13th European Conference on Power Electronics and Applications : 8-10 September 2009, Barcelona, Spain2009 / [9] p. : ill. [CD-ROM] https://ieeexplore.ieee.org/document/5278764

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ElektrimõõtmisedKalda, Heljut; Lootus, Jaan; Võrk, Rein1997 https://www.ester.ee/record=b1059078*est

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Elektroonika laboratoorsed töödKalda, Heljut1999 https://www.ester.ee/record=b1305692*est

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Elektrotehnika : ülesannete lahendusi ja ülesandedKalda, Heljut2000 https://www.ester.ee/record=b1445476*est

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Elektrotehnika : ülesannete lahendusi ja ülesandeidKalda, Heljut1998 https://www.ester.ee/record=b1207304*est

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Elektrotehnika laboratoorsed töödKalda, Heljut; Rosman, Tarmo1999 https://www.ester.ee/record=b1269058*est

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newspaper article

[e-õppest TTÜ teaduskondades ja kolledžites]Puust, Raido; Kalda, Heljut; Jokk, Viivi; Veske, HeimarMente et Manu2011 / lk. 4 https://www.ester.ee/record=b1242496*est

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book article

Harmonic voltages and currents in LV industrial power systems, shunt capacitors and additional power lossesVinnal, Toomas; Kalda, Heljut; Mõlder, Heigo9th International Symposium "Topical problems in the field of electrical and power engineering". Doctoral school of energy and geotechnology. II : Pärnu, Estonia, June 14-19, 20102010 / p. 47-52 : ill

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Juhitav lineaarne asünkroonmootorRedkin, V.; Järvik, Jaan; Kalda, HeljutXXXII üliõpilaste teaduslik-tehnilise konverentsi ettekannete teesid : pühendatud V. I. Lenini 110. sünniaastapäevale : 16.-18. aprill 19801981 / lk. 110 https://www.ester.ee/record=b1322611*est

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Karusellvalumasina lineaarelektriajami optimeerimineKalda, Heljut; Teemets, RaivoXXIX vabariiklik üliõpilaste teaduslik- tehniline konverents 30. märtsist - 1. aprillini 1977 : ettekannete teesid1977 / lk. 58 https://www.ester.ee/record=b2449987*est

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Measurements and analyses of supply voltage magnitude and voltage variations in Estonian industrial companiesVinnal, Toomas; Kalda, Heljut; Mõlder, Heigo10th International Symposium "Topical Problems in the Field of Electrical and Power Engineering”. Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 10-15, 20112011 / p. 46-51 : ill

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Power losses in induction motors in relation to supply voltage qualityVinnal, Toomas; Janson, Kuno; Kalda, HeljutPCIM 2010 Power Electronics, Intelligent Motion, Power Quality : Nuremberg, Germany, 4-6 May 20102010 / p. 636-642

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Power quality problems in low voltage networks of EstoniaVinnal, Toomas; Janson, Kuno; Kalda, Heljut; Sakkos, TiiuCIRED 2013 : 22nd international conference & exhibition on electricity distribution : 10-13 june 2013 Kistamässan, Kista, Stockholm, Sweden : electricity distribution systems for a sustainable future : special reports2013 / p. 1-4 : ill

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Study of failures with 10kv and 35kv voltage transformersJanson, Kuno; Järvik, Jaan; Kalda, Heljut; Šklovski, JevgeniThe 3rd International Conference Electric Power Quality and Supply Reliability, September 4...6, 2002, Haapsalu, Estonia : proceedings2002 / p. 133-138 : ill

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Study of transformer overvoltages under single-phase earth faults in 6...35 kV networks with insulated neutral point [Electronic resource]Janson, Kuno; Järvik, Jaan; Kalda, Heljut; Külm, Evald; Šklovski, JevgeniElectric Power Engineering 2003 : 5th International Scientific Conference : January 28-29, 2003, Beskydy Pension, Visalaje, Czech Republic : held by occasion of 25th Anniversary of Department of Electrical2003 / [17] p. : ill. [CD-ROM]

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Supply voltage level optimisation in low voltage networks using shunt capacitorsVinnal, Toomas; Janson, Kuno; Kalda, Heljut; Kütt, LauriElectrical and control technologies : proceedings of the the 7th international conference on electrical and control technologies ECT-20122012 / p. 206-211 : ill

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Supply voltage level optimization in industrial low voltage networksVinnal, Toomas; Janson, Kuno; Kalda, Heljut; Sakkos, TiiuPQ2012 : 8th International Conference : 2012 Electric Power Quality and Supply Reliability : June 11-13, 2012, Tartu, Estonia : conference proceedings2012 / p. 149-154 : ill https://ieeexplore.ieee.org/document/6256219

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journal article

Supply voltage quality in low voltage industrial networks of EstoniaVinnal, Toomas; Janson, Kuno; Järvik, Jaan; Kalda, Heljut; Sakkos, TiiuEstonian journal of engineering2012 / p. 102-126 : ill

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newspaper article

Tee ühe unistuse täitumise juurde : [TTÜ elektrotehnika aluste ja elektrimasinate instituudi haridustehnoloogi Heljut Kaldat küsitles TTÜ haridustehnoloogia keskuse haridustehnoloog Merike Saar]Kalda, HeljutE-õppe uudiskiri2011 / lk. 8-9 : fot

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book article

Wound core voltage transformers overvoltage problems caused by single phase faults in MV networksJärvik, Jaan; Kalda, Heljut; Külm, Evald; Sepping, Eino; Choi, J.Международная научно-техническая конференция "Перенапряжения и надежность эксплуатации электрооборудования" : Санкт-Петербург, 31 марта - 05 апреля 2003 г. Выпуск 12003 / p. 324-332 : ill

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Õppimisest ja elektroonikastKalda, Heljut1996 https://www.ester.ee/record=b1070629*est

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Анализ конструкций линейных асинхронных двигателей, управляемых подмагничиваниемKalda, Heljut; Lahtmets, RainИсследование электромагнитных и электромашинных устройств специального назначения1981 / с. 3-12

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Исследование возможностей применения постоянного подмагничивания для управления индукционными машинамиKalda, Heljut; Lahtmets, Rain; Järvik, JaanМатериалы VIII Таллинского совещания по электромагнитным расходомерам и электротехнике жидких проводников. Часть III, МГД-машины. МГД-привод1980

book article

Kalda, Heljut (author)

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author 21

CV 12

name of the person 10