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Siemens TEFC STD IE2, IE3, IE4 Motor

The New IS: 12615 is based on the International Standard IEC 60034-30 (2008) which defines New Efficiency Classification for single speed, three phase, induction motors. The new IS: 12615 covers single speed, three-phase, 50Hz, cage induction motors that: have rated voltage ≤1000V; have a rated output 0.37kW ≤ PN ≤ 375kW; have either 2, 4 or 6 poles; meet frame size to output relation as stipulated in IS: 1231 (for outputs covered by IS:1231); are rated on the basis of either duty type S1 (continuous duty) or S3 (intermittent periodic duty) with rated cyclic duration factor of 80% or higher; are capable of operating direct on-line; are designed for operation on virtually sinusoidal and balanced voltage conditions as defined in 7.2.1 of IS/IEC 60034-1; designed for an ambient temperature not exceeding 40°C and altitude not exceeding 1000m; have degree of protection IP44 or superior; have method of cooling IC411 in accordance with IS 6362 / IEC 60034-6; have service factor not exceeding 1.0.
The Efficiency classes defined are:
IE1 – Standard Efficiency
IE2 – High Efficiency
IE3 – Premium Efficiency
The New IS:12615 also stipulates that for motors to be classified as “Energy Efficient”, these must meet at least IE2 efficiency values.


Siemens TEFC STD IE2, IE3 Motor Brochure PDF



Parameters TEFC Standard motor
Power 0.37 kw… 315 kW
Voltage 230 – 690 V
Shaft height 63 – 200 mm
No. of poles 2 – 8
Degree of Protection IP55, IP56, IP65, IP66
Efficiency class IE1 – IE4