IS:12615-2011

The New IS:12615-2011 is based on the International Standard IEC 60034-30 (2008) which defines New Efficiency Classification for single speed, three phase, induction motors.
The IS:12615-2011 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 values of efficiency for motors to classify as IE2 or IE3 in accordance with the new IS:12615-2011 are as under:

kW	2 Pole			4 Pole			6 Pole
	Frame Size	Efficiency %		Frame Size	Efficiency %		Frame Size	Efficiency %
		IE2	IE3		IE2	IE3		IE2	IE3
0.37	71	72.2	75.5	71	70.1	73	80	69	71.9
0.55	71	74.8	78.1	80	75.1	78	80	72.9	75.9
0.75	80	77.4	80.7	80	79.6	82.5	90S	75.9	78.9
1.1	80	79.6	82.7	90S	81.4	84.1	90L	78.1	81
1.5	90S	81.3	84.2	90L	82.8	85.3	100L	79.8	82.5
2.2	90L	83.2	85.9	100L	84.3	86.7	112M	81.8	84.3
3.7	100L	85.5	87.8	112M	86.3	88.4	132S	84.3	86.5
5.5	132S	87	89.2	132S	87.7	89.6	132M	86	88
7.5	132S	88.1	90.1	132M	88.7	90.4	160M	87.2	89.1
11	160M	89.4	91.2	160M	89.8	91.4	160L	88.7	90.3
15	160M	90.3	91.9	160L	90.6	92.1	180L	89.7	91.2
18.5	160L	90.9	92.4	180M	91.2	92.6	200L	90.4	91.7
22	180M	91.3	92.7	180L	91.6	93	200L	90.9	92.2
30	200L	92	93.3	200L	92.3	93.6	225M	91.7	92.9
37	200L	92.5	93.7	225S	92.7	93.9	250M	92.2	93.3
45	225M	92.9	94	225M	93.1	94.2	280S	92.7	93.7
55	250M	93.2	94.3	250M	93.5	94.6	280M	93.1	94.1
75	280S	93.8	94.7	280S	94	95	315S	93.7	94.6
90	280M	94.1	95	280M	94.2	95.2	315M	94	94.9
110	315S	94.3	95.2	315S	94.5	95.4	315M#	94.3	95.1
125	315M	94.5	95.3	315M	94.6	95.5	315M#	94.4	95.2
132	315M#	94.6	95.4	315M#	94.7	95.6	315L#	94.6	95.4
160	315L#	94.8	95.6	315L#	94.9	95.8	355L	94.8	95.6
200	315L	95	95.8	315L	95.1	96	355L	95	95.8
250	355L	95	95.8	355L	95.1	96	355L	95	95.8
315	355L	95	95.8	355L	95.1	96		95	95.8
375		95	95.8		95.1	96		95	95.8