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National Regulator for Compulsory Specifications Act, 2008 (Act No. 5 of 2008)

Notices

Compulsory Specification for Efficiency Requirements of Electric Motors (VC9113)

1. Scope

 

1.1 This compulsory  specification covers the efficiency requirement for electric motor, rated for operation on a sinusoidal voltage, that:

 

1.1.1 have two (2), four (4), six (6) or eight (8) pole;

 

1.1.2 have rated voltage Un above 50 V and up to and including 1 000 V;

 

1.1.3 have a rated power Pn from 0,75 kW to 375 kW ;

 

1.1.4 are marked with any ambient temperature within the range of -20 °C to + 60 °C (smoke extraction motors with a temperature class of up to and including 400 °C are covered by this compulsory specification);

 

1.1.5 are marked with an altitude up to 4 000 m above sea level;

 

1.1.6 Motors with flanges, feet and/or shafts with mechanical dimensions different from SANS 60072-1 are covered by this compulsory specification;

 

1.1.7 Geared motors are covered by this compulsory specification including those incorporating non-standard shafts and flanges.

 

1.2 This compulsory specification does not cover the efficiency requirements of the following electric motors:

 

1.2.1 Single-speed motors with 10 or more poles or multi-speed motors;

 

1.2.2 Motors with mechanical commutators (such as DC motors);

 

1.2.3 Motors completely integrated into a machine;

 

1.2.4 Brake motors when the brake is an integral part of the inner motor construction and can neither be removed nor supplied by a separate power source during the testing of motor efficiency;

 

1.2.5 Motors designed to operate wholly immersed in a liquid;

 

1.2.6 Smoke extraction motors with a temperature class above 400 °C.