CSA C390:22

1 Scope 1.1 Application This Standard specifies a test method for three-phase induction motors rated 0.746 kW and higher. The Standard also references energy efficiency levels for three-phase induction motors rated 0.746 kW up to 400 kW. This Standard references energy efficiency levels for both NEMA and IEC motor designations. Efficiency requirements for units rated for operation at 60 Hz are defined in Tables 3, 4, 5, 7, 8, 9, and 12. Efficiency requirements for units rated for operation at 50 Hz are defined in Tables 6, 10, and 11. Note: This Standard is not limited to specific types of three-phase induction motors, but where this Standard is referenced in regional legislation some specific motor types might be included or excluded from the regulations. Legislated requirements for a given jurisdiction supersede the requirements of this Standard and neither should be used without the other. 1.2 Terminology In CSA standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application. 1.3 SI units The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.