NEMA 250 Frame Size Speed Capability Squirrel Cage Induction Motors.

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NEMA 250 Frame Size Speed Capability Squirrel Cage Induction Motors.

Electric Motors, Generators and Drives

NEMA Continuous speed capability for general purpose design A and B Direct coupled (TS shaft for motors above the 250 Frame size) squirrel cage induction motors.

NEMA Horsepower	Totally Enclosed Fan-Cooled			Open Drip proof
	Synchronous Speed at 60 Hz
	3600	1800	1200	3600	1800	1200
	Minimum Design Speed
1/4	7200	3600	2400	7200	3600	2400
1/3	7200	3600	2400	7200	3600	2400
1/2	7200	3600	2400	7200	3600	2400
3/4	7200	3600	2400	7200	3600	2400
1	7200	3600	2400	7200	3600	2400
1.5	7200	3600	2400	7200	3600	2400
2	7200	3600	2400	7200	3600	2400
3	7200	3600	2400	7200	3600	2400
5	7200	3600	2400	7200	3600	2400
7.5	5400	3600	2400	7200	3600	2400
10	5400	3600	2400	5400	3600	2400
15	5400	3600	2400	5400	3600	2400
20	5400	3600	2400	5400	3600	2400
25	5400	2700	2400	5400	2700	2400
30	5400	2700	2400	5400	2700	2400
40	4500	2700	2400	5400	2700	2400
50	4500	2700	2400	4500	2700	2400
60	3600	2700	2400	4500	2700	2400
75	3600	2700	2400	3600	2700	2400
100	3600	2700	1800	3600	2700	1800
125	3600	2700	1800	3600	2700	1800
150	3600	2700	1800	3600	2700	1800
200	3600	2300	1800	3600	2700	1800
250	3600	2300	1800	3600	2300	1800
300	3600	2300	1800	3600	2300	1800
350	3600	1800	1800	3600	1800	1800
400	3600	1800	-	3600	1800	-
450	3600	1800	-	3600	1800	-
500	3600	1800	-	3600	1800	-