MEPS for Three-Phase Induction Motors

Minimum Efficiency (without tolerances), η

Three-phase induction motors with a rated output from 0.75kW to 200kW

η  ≥   

where -
(a) A is 0.3569 for a 2-pole motor, 0.0773 for a 4-pole motor and 0.1252 for a 6-pole motor;
(b) B is -3.3076 for a 2-pole motor, -1.8951 for a 4-pole motor and -2.613 for a 6-pole motor;
(c) C is 11.6108 for a 2-pole motor, 9.2984 for a 4-pole motor and 11.9963 for a 6-pole motor;
(d) D is 82.2503 for a 2-pole motor, 83.7025 for a 4-pole motor and 80.4769 for a 6-pole motor; and
(e) P is the rated power output of the motor.

three-phase induction motors with a rated output >200kW to ≤ 375kWthree-phase induction motors with a rated output >200kW to ≤ 375kW

(a) for 2-pole motors: η at rated output ≥ 95.8;
(b) for 4-pole motors: η at rated output ≥ 96; and
(c) for 6-pole motors: η at rated output ≥ 95.8.