Maximum Locked-Rotor Currents
Three-Phase Squirrel Cage Motors
NEMA Designs B, C & D
| Locked-Rotor Current in Amperes | ||||||
| HP | Rated Voltage | |||||
| 200V | 230V | 460V | 575V | 2300V | 4000V | |
| .5 .75 1 | 23 29 34 | 20 25 30 | 10 12 15 | 8 10 12 | ||
| 1.5 2 3 | 46 57 74 | 40 50 64 | 20 25 32 | 16 20 26 | ||
| 5 7.5 10 | 106 146 186 | 92 127 162 | 46 63 81 | 37 51 65 | ||
| 15 20 25 | 267 333 420 | 232 290 365 | 116 145 182 | 93 116 146 | ||
| 30 40 50 | 500 667 834 | 435 580 725 | 217 290 362 | 174 232 290 | ||
| 60 75 100 | 1000 1250 1665 | 870 1085 1450 | 435 542 725 | 348 434 580 | 87 108 145 | 50 62 83 |
| 125 150 200 | 2085 2500 3335 | 1815 2170 2900 | 907 1085 1450 | 726 868 1160 | 181 217 290 | 104 125 167 |
| 250 300 350 | 4200 5060 5860 | 3650 4400 5100 | 1825 2200 2550 | 1460 1760 2040 | 365 440 510 | 210 253 293 |
| 400 450 500 | 6670 7470 8340 | 5800 6500 7250 | 2900 3250 3625 | 2320 2600 2900 | 580 650 725 | 333 374 417 |
The locked-rotor current of Design B, C and D constant-speed induction motors, when measured with rated voltage and frequency impressed and with rotor locked, shall not exceed the above values.
Reference: NEMA Standards MG 1-12.35.
Maximum Locked-Rotor Currents
Three-Phase Squirrel Cage Motors
NEMA Design E
| Locked-Rotor Current in Amperes | ||||||
| HP | Rated Voltage | |||||
| 200V | 230V | 460V | 575V | 2300V | 4000V | |
| .5 .75 1 | 23 29 35 | 20 25 30 | 10 13 15 | 8 10 12 | ||
| 1.5 2 3 | 46 58 84 | 40 50 73 | 20 25 37 | 16 20 29 | ||
| 5 7.5 10 | 114 210 259 | 122 183 225 | 61 92 113 | 49 73 90 | ||
| 15 20 25 | 388 516 646 | 337 449 562 | 169 225 281 | 135 180 225 | ||
| 30 40 50 | 775 948 1185 | 674 824 1030 | 337 412 515 | 270 330 412 | ||
| 60 75 100 | 1421 1777 2154 | 1236 1545 1873 | 618 773 937 | 494 618 749 | 124 155 187 | 71 89 108 |
| 125 150 200 | 2692 3230 4307 | 2341 2809 3745 | 1171 1405 1873 | 936 1124 1498 | 234 281 375 | 135 162 215 |
| 250 300 350 | 5391 6461 7537 | 4688 5618 6554 | 2344 2809 3277 | 1875 2247 2622 | 469 562 655 | 270 323 377 |
| 400 450 500 | 8614 9691 10767 | 7490 8427 9363 | 3745 4214 4682 | 2996 3371 3745 | 749 843 936 | 431 485 538 |
The locked-rotor current of Design E constant-speed induction motors, when measured with rated voltage and frequency impressed and with rotor locked, shall not exceed the above values.
Reference: NEMA Standards MG 1-12.35A.