Browsing Research Publications by Author "Ranaweera, A"

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  • A 12v dc/230v ac inverter/charger with advanced Protection features 
    Ranaweera, A; Seneviratne, BKCC; Kalyanapala, M [Conference-Full-text]
    The inverter can be used as a source of ac power in the absence of grid power. The battery can also be charged by alternative sources of energy if grid power is not available at all. The unit described works as a batter}' ...
  • An electronic ampere-hour meter 
    Ranaweera, A; De Silva, WNH; Eranjeewa, AAT; Epa, DJ; Kandeepan, K [Conference-Full-text]
    The electronic ampere-hour meter does not require any voltage supply and its operation is based on the magnetic coupling to electrical conductors feeding consumer's load. A capacitor inside the meter is charged at a rate ...
  • Is cues of contagious diseases in advertising a friend or foe? 
    Ranaweera, A; Wijekoon, A [Article-Full-text]
    We are all well aware of how the Covid-19 pandemic has caused devastating economic and social disruptions globally. The pandemic caused serious health, economic, social, business, travel, education, and workplace challenges ...
  • An over-current indica tor 
    Ranaweera, A; Chandanandana, D; De Silva, MTK; Hewawasam, HYA; Indika, K [Conference-Full-text]
    The over-current indicator indicates to the user that the current in a circuit is exceeding its rated value as soon as it occurs. The current is sensed by a current transformer (CT) and the rectified and regulated output ...
  • Performance of an electronic energy meter 
    Ranaweera, A; Wickramaratne, LS [Conference-Full-text]
    In this paper the principle of operation, implementation and performance of an integrated circuit based electronic energy meter are described. Comparison is made of the performance of the electronic energy meter with that ...
  • Remote meter reading over power distribution lines 
    Gamage, K; Ranaweera, A; Karunadasa, JP; Dias, D [Conference-Extended-Abstract]
    The paper presents the development of a simple technique for remote reading of utility meters using low voltage power distribution lines. Remotely reading electricity, gas and water meters have distinct advantages over ...