This paper presents an energy efficiency labelling system for industrial motors used in Sri Lanka. Industrial sector in Sri Lanka consumes 3,880 GWh of electricity, i.e. 33% out of 11,741 GWh of total electricity consumption (2015). Induction motors account for a high share of energy used in industry. The energy efficiency labelling system proposed will enable improved efficiency of industrial motors by reducing energy losses.
The automatic efficiency testing program is developed using the LabView development platform based on IEC 60034-2-1 standard. Subsequently, a test bench design was also developed. It will be helpful in purchasing motors from the international market and thereby motor driven systems will achieve the next level of efficiency in the industrial sector. It also helps to cross check the efficiency level of repaired or rewound motors. An economic calculation model (tariff based) is developed to analyse the economic benefits of higher efficiency levels. This economic calculation model assists in decision-making of replacement of a motor or an upgrade of a system.