Standard Motor Catalog

Section TR Technical Reference Guide

Table 9: Comparison of NEMA Design A and B / IEC Starting Characteristics for Normal Starting Torque Cage Motors

Number of Poles

2

4

6

8

Hp kW TI

Tu Tb

TI

Tu Tb

TI

Tu Tb

TI

Tu Tb

3 2.2 160/170 110/100 230/200 215/180 150/120 250/200 155/160 110/110 230/190 130/140 100/100 205/180 5 3.7 150/160 105/110 215/200 175/170 130/120 225/200 150/150 105/110 215/190 130/130 100/100 205/180 7.5 5.5 140/150 100/100 200/200 175/160 120/110 215/200 150/150 105/110 205/190 125/130 100/100 200/180 10 7.5 135/150 100/100 200/200 165/160 115/110 200/200 150/150 105/110 200/180 125/135 100/100 200/170 15-20 11-15 130/140 100/100 200/200 150/150 105/110 200/200 135/140 100/100 200/180 125/120 100/90 200/170 25-30 18.5-22.5 130/130 100/90 200/190 150/140 105/100 200/190 135/140 100/100 200/180 125/120 100/90 200/170 40-50 30-37 120/120 100/90 200/190 140/130 100/100 200/190 135/130 100/100 200/180 125/120 100/90 200/170 60-75 45-56 105/110 95/80 200/180 140/120 100/90 200/180 135/120 100/90 200/170 125/110 100/80 200/170 100-125 75-93 100/100 90/70 200/180 110/110 100/80 200/180 125/110 100/80 200/170 120/100 100/70 200/160 150-200 110-150 100/90 90/70 200/170 100/100 90/80 200/170 120/100 100/80 200/170 120/90 100/70 200/160 250-300 186-220 70/80 65/60 200/170 80/90 70/70 175/170 100/90 90/70 175/160 60/90 60/70 175/160 350-500 260-370 70/75 65/60 175/160 80/75 70/60 175/160 60/75 60/60 175/160 60/75 60/60 175/160 600-800 450-600 60/65 60/50 175/160 60/65 60/50 175/160 60/65 60/50 175/160 60/65 60/50 175/160 Notes: (3) TU = Pull-up torque, percentage of full-load torque (4) Tb = Breakdown torque, percentage of full-load torque (5) Minimum values with no negative tolerance (6) Where the horsepower’s are in scope, this table is for NEMA Designs A or B (7) NEMA value corresponds to maximum horsepower and the torques for the lower horsepower(s) are equal to or greater than the value shown. (1) First value indicates NEMA and Second value indicates IEC. (2) TI = Locked-rotor torque, percentage of full-load torque

Table 10: Comparison of NEMA Design C / IEC Design H Starting Characteristics for High Starting Torque Cage Motors

Number of Poles

4

6

8

Hp kW TI

Tu

Tb

TI

Tu

Tb

TI

Tu

Tb

3 5

2.2

*/270

*/180

*/200

255/240 175/165 225/190 225/210 160/150 200/190

TECHNICAL REFERENCE GUIDE

3.7 250/255 175/180 200/200 250/225 175/165 200/190 225/200 160/150 200/190 7.5-10 5.5-7.5 250/240 175/165 190/200 225/225 160/165 190/190 200/200 140/150 190/190 15 11 225/225 160/165 190/200 200/210 140/150 190/190 200/200 140/140 190/190 20 15 200/225 140/165 190/200 200/210 140/150 190/190 200/200 140/140 190/190 30 22.5 200/210 140/150 190/190 200/210 140/150 190/190 200/200 140/140 190/190 40-50 30-37 200/200 140/150 190/190 200/200 140/150 190/190 200/200 140/140 190/190 75-200 55-150 200/200 140/140 190/190 200/200 140/140 190/190 200/200 140/140 190/190 Notes: (1) Please refer above Notes from (1) to (6) (2) *Not defined in NEMA. Design B torques normally adequate for 3 Hp or less. (3) This table is for NEMA Design C and IEC Design H

TR.13

Data subject to change without notice. 03/24 • www.wolongamerica.com