Drip-Proof Induction Motor Efficiencies

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Drip-Proof Induction Motor Efficiencies

Electric Motors, Generators and Drives

This table defines the nominal efficiencies for open drip-proof induction motors that ar rate at 600 V or less.

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 Open Drip-Proof Induction Motors Rated 600 V or Less
Nominal Efficiencies for NEMA Induction Motors Rated 600 Volts or Less (Random Wound)
hp	Open Drip-Proof
	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	N/A	77.0
1.5	84.0	86.5	84.0	86.5	82.5	84.0
2	85.5	87.5	84.0	86.5	84.0	85.5
3	86.5	88.5	86.5	89.5	84.0	85.5
5	87.5	89.5	87.5	89.5	85.5	86.5
7.5	88.5	90.2	88.5	91.0	87.5	88.5
10	90.2	91.7	89.5	91.7	88.5	89.5
15	90.2	91.7	91.0	93.0	89.5	90.2
20	91.0	92.4	91.0	93.0	90.2	91.0
25	91.7	93.0	91.7	93.6	91.0	91.7
30	92.4	93.6	92.4	94.1	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	95.0	93.0	93.6
100	94.1	95.0	94.1	95.4	93.0	93.6
125	94.1	95.0	94.5	95.4	93.6	94.1
150	94.5	95.4	95.0	95.8	93.6	94.1
200	94.5	95.4	95.0	95.8	94.5	95.0
250	-	95.4	-	95.8	-	95.0
300	-	95.4	-	95.8	-	95.4
350	-	95.4	-	95.8	-	95.4
400	-	95.8	-	95.8	-	95.8
450	-	96.2	-	96.2	-	95.8
500	-	96.2	-	96.2	-	95.8