IS 12615:2018

This standard covers the efficiency classes and performance specifications of single-speed line operated a.c. motors that are rated according to IS 15999 (Part 1)/IEC 60034-1, rated for operation on a sinusoidal voltage supply and : a) Have a rated power from 0.12 kW to 1 000 kW; b) Have 2, 4, 6 or 8 poles; c) Have a rated voltage Un up to 1 000 V with a rated frequency of 50 Hz; d) Frame size from 56 up to and including 315 M having Frame to output co-relation as specified in Table 3 of IS 1231; e) Frame size 315 L with dimensions as per IS 1231 and having output rating as declared by motor manufacturer; f) Frame size 355 and above, with dimensions and output ratings as declared by motor manufacturer but conforming to IS 8223; g) Are capable of continuous operation at their rated power with a winding temperature rise within the specified insulation temperature class; h) Are marked with any ambient temperature within the range of – 20°C to + 60°C; j) Are marked with an altitude up to 4 000 m above sea level; k) This standard covers motors with or without service factor; m) Most motors covered by this standard are primarily rated for duty type S1 (continuous duty).