Draft Details

Designation:C747
Source:CSA
Review start date:Apr 5, 2022
Review end date:Jun 4, 2022
Categories:Energy
Contact email:mary.morgan(at)csagroup.org
Draft Scope/Description:

1.1 Inclusions
This Standard specifies the test methods to be used in measuring the energy efficiency of small direct-current (dc) and single‑ and small three‑phase alternating-current (ac) motors. This Standard includes the following motor types:

(a)   capacitor, permanent‑split;
(b)   capacitor, capacitor‑start or capacitor‑run;
(c)   split phase;
(d)   split phase start, capacitor‑run;
(e)   shaded pole;
(f)    reluctance*;
(g)   polyphase induction;
(h)   dc*;
(i)    permanent magnet*;
(j)    brushless dc*; and
(k)   converter driven*.
(l)    other single-phase motors suitable for output input test method*

*Where a motor requires a converter to operate on alternating current supply, the motor and converter are tested together.

1.2 Application

This Standard applies to

(a)   dc and three‑phase ac motors with rated output power less than or equal to 0.746 kW and
(b)   single‑phase ac motors of the type specified in Clause 1.1.

1.3 Marking and tolerance

This Standard specifies marking methods and allowable tolerances on energy efficiency values.

1.4 Continuous duty

This Standard applies only to motors rated for continuous duty.

1.5 SI units

SI units of measurement should be used in the application of this Standard; however, other units may be used for testing provided that they are used consistently.

1.6 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; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. 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 (non-mandatory) to define their application.

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