The efficiency of induction motors has emerged as having the biggest potential in saving energy consumption. This is important to South Africa where energy saving has risen as a major concern. This paper looks at the different motor efficiency standards that are available and attempts to compare them. The paper discusses results obtained from tests done on a 3kW high efficient motor. Three standards used were the CSA-390 a Canadian standard, IEEE 112 an American standard and the new European standard, the IEC 61971. Results show that the IEEE and CSA-390 produce higher efficiencies than the IEC standards. The reasons for this are discussed. The effects of equipment accuracy and supply harmonics are discussed in brief. A suggestion for a South African Standard with aspects drawn from the standards is put down as the present SANS IEC 60034-2 (1972) is outdated.
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