Nema Motor Frame Prefixes

However as a frame number becomes higher sc in general does the physical size of the motor and the horsepower. Prefix letters are often used bymanufacturers such as g184t to indicate the overall length of the motor but do not denote differances in the nema standardised mounting dimensions. There are many motors of the same horsepower built in different frames.
nema motor frame prefixes

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D dimension shaft height of a motor or generator in these frame sizes equals the value of the first two digits in the frame number.

Nema motor frame prefixes. Nema prefixes letters or numbers appearing in front of the nema frame number are those of the manufacturer. Jm close coupled pump motor with c face mounting and special shaft extensions. The signifi cance from one manufacturer to another will vary. They have no nema frame significance.

Motors having no suffix letters other than nema frames 42 48 56 are built prior to nema standards. Frame prefixes letters or numbers appearing in front of the nema frame number are those of the manufacturer. Frame size chart frame sizes pdf nema frame dimensions including for newer. Nema national electrical manufacturers.

Nema frameshaft sizes frame numbers are not intended to indicate electrical characteristics such as horsepower. See nema mg1 1998 1878 for example. They have no nema frame significance. Suffixes to nema frames and what they mean.

284 frame is 284 7 d 7 lp or lph. Horsepower 900 rpm 1200 rpm 1800 rpm 3600 rpm hp t frames 1964 present u frame 1952 present original nema t frames 1964 present u frame 1952 present original nema t frames. For example the letter in front of leesons frame number l56 indicates the overall length of the motor. A dc motor or generator c face mounting on drive end s flange mounting on drive end p vertical hollow and solid shaft motors with p base flange.

Electrical motor efficiency ratings nema electrical motor efficiency ratings electrical motor shaft power electrical motors are rated in horsepower or watt electrical motors full load amps full load currents for 460 volts 230 volts and 115 volts motors single and 3 phase. For example the letter in front of leesons frame number l56 indicates the overall length of the motor. Hp vertical solid shaft motors with p base flange normal thrust. Nema c face motors also have rigid base have different ba dimensions in the following instances 3143tc.

803 324 3259 standard nema frames vs. 800 868 3770 fax. Manufacturer variations nema prefixes manufacturers use prefixes to specify variations within a frame size such as the overall motor length. K sump pump motors.

Frame size designations nema iec frame shaft height in shaft height mm frame shaft height in shaft height mm 63 2480 63 42 2625 66675 71 2795 71 48 30 76200 80 3150 80 56 140t 35 88900 90 3543 90 100 3937 100 180t 45 114300 112 4409 112 210t 53 133350 132 5197 132. And nema suffixes c nema c face mounting specify with or without rigid base. There is no standardization of prefixes and you must check with the manufacturer to learn the meaning of a prefix.