Totally Enclosed Fan-Cooled Induction Motors Efficiencies

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Totally Enclosed Fan-Cooled Induction Motors Efficiencies

Electric Motors, Generators and Drives

This table defines the nominal efficiencies for totally enclosed fan-cooled induction motors that ar rate at 600 V or less (Random Wound).

An AC induction or asynchronous motor is an electric motor where the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding.

Nominal Efficiencies for Totally Enclosed Fan-Cooled Induction Motors
hp	Totally Enclosed Fan-Cooled
	1200 RPM (6-pole)		1800 RPM (4-pole)		3600 RPM (2-pole)
	EPAct*	NEMA Premium	EPAct*	NEMA Premium	EPAct*	NEMA Premium
1	80.0	82.5	82.5	85.5	75.5	77.0
1.5	85.5	87.5	84.0	86.5	82.5	84.0
2	86.5	88.5	84.0	86.5	84.0	85.5
3	87.5	89.5	87.5	89.5	85.5	86.5
5	87.5	89.5	87.5	89.5	87.5	88.5
7.5	89.5	91.0	89.5	91.7	88.5	89.5
10	89.5	91.0	89.5	91.7	89.5	90.2
15	90.2	91.7	91.0	92.4	90.2	91.0
20	90.2	91.7	91.0	93.0	90.2	91.0
25	91.7	93.0	92.4	93.6	91.0	91.7
30	91.7	93.0	92.4	93.6	91.0	91.7
40	93.0	94.1	93.0	94.1	91.7	92.4
50	93.0	94.1	93.0	94.5	92.4	93.0
60	93.6	94.5	93.6	95.0	93.0	93.6
75	93.6	94.5	94.1	95.4	93.0	93.6
100	94.1	95.0	94.5	95.4	93.6	94.1
125	94.1	95.0	94.5	95.4	94.5	95.0
150	95.0	95.8	95.0	95.8	94.5	95.0
200	95.0	95.8	95.0	96.2	95.0	95.4
250	-	95.8	-	96.2	-	95.8
300	-	95.8	-	96.2	-	95.8
350	-	95.8	-	96.2	-	95.8
400	-	95.8	-	96.2	-	95.8
450	-	95.8	-	96.2	-	95.8
500	-	95.8	-	96.2	-	95.8