15 Hp Electric Motor Frame Size

1200 1952 rerate 1964 rerate.

15 hp electric motor frame size.

Electrical induction motors synchronous speed the speed at which an induction motor operates depends on the input power. Table 1 open drip proof three phase frame sizes general purpose rpm nema program hp orig. In that time there have been a great many changes. 15 hp general purpose motor 3 phase 1770 nameplate rpm 230 460 voltage 254 6t frame.

Motor dimensional chart nema c and j face mounting dimensions mounting dimensions of 1the 156j face are exactly the same as the nema 456c. To zoom in use the keyboard to focus on the arrow icon within the product image. By nema definition two digit frame numbers are fractional frames even though 1 hp or larger motors may be built in them. Dimension of a 213 frame motor is 5 21 divided by 4 5.

3600 1952 rerate 1964 rerate orig. Once it receives focus use the arrow keys on the keyboard to move and position the product image. See illustrations and table below for speci cs. Standard nema frames vs horsepower hp 900 rpm 1200 rpm 1800 rpm 3600 rpm t frames 1964 present u frame 1952 present original nema 1 1 5 2 3 5 7 5 10 15 20 25 30.

Bearing diameters were also increased to accommodate the larger shaft sizes and heavier loads associated with the higher horsepowers. Three digit frame numbers are by definition integral frames. 56c 56hc 56j 143tc and 145tc. Industrial electric motors have been available for nearly a century.

Electric motor calculator calculate amps hp and kva. Electrical electrical units amps and electrical wiring wire gauge and awg electrical formulas and motors. Motor wire size and circuit protection calculator. A good field reference for maintenance and troubleshooting is ugly s electric motor and controls ugly s electric motors and controls 2014 edition this calculator is based on information found in this reference guide and can help electricians troubleshoot maintenance and control circuits.

The 254u frame 7 1 2 hp at 1800 rpm has a 1 3 8 shaft and the current 254t frame 15 hp at 1800 rpm has a 1 5 8 shaft. Similarly the d dimension of a 213 frame motor is 5 21 divided by 4 5. 56j face 5has 3a threaded shaft of stainless steel while all others have a keyed steel shaft. Electrical motors frame dimensions nema electrical motor frame dimensions nema national electrical manufacturers association national electrical manufacturers association nema a b c and d electrical motor design nema has established four different designs a b c and d for electrical induction motors.

By nema definition two digit frame numbers are fractional frames even though 1 hp or larger motors may be built in them. 1800 1952 rerate 1964 rerate orig. Three digit frame numbers are by definition integral frames. Refer to nema standard dimension chart and variations below.

The mystery of motor frame size.