Cut Sheet

Volume 10—Enclosed Control CA08100012E—November 2012 www.eaton.com V10-T17-77
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17.9
Technical Data and Specifications
Ampere Ratings of AC Motors
Ampere ratings of motors
vary somewhat, depending
upon the type of motor. The
values given below are for
drip-proof, Class B insulated
(T Frame) where available,
1.15 service factor, NEMA
Design B motors. These
values represent an average
full load motor current that
was calculated from the
motor performance data
published by several motor
manufacturers. In the case of
high torque squirrel cage
motors, the ampere ratings
will be at least 10% greater
than the values given below.
Caution—These average
ratings could be high or low
for a specific motor
and therefore heater coil
selection on this basis always
involves risk. For fully
reliable motor protection,
select heater coils on the
basis of full load current
rating as shown on the
motor nameplate.
Ampere Ratings of Three-Phase, 60 Hz, AC Induction Motor
Notes
1
To convert horsepower to kW, multiply horsepower by 0.7457.
2
380V 50 Hz.
hp
1
Syn.
Speed
RPM
Current in Amperes
hp
1
Syn.
Speed
RPM
Current in Amperes
200V 230V 380V
2
460V 575V 2200V 200V 230V 380V
2
460V 575V 2200V
1/4 1800 1.09 0.95 0.55 0.48 0.38 — 25 3600 69.9 60.8 36.8 30.4 24.3 —
1200 1.61 1.40 0.81 0.70 0.56 — 1800 74.5 64.8 39.2 32.4 25.9 —
900 1.84 1.60 0.93 0.80 0.64 — 1200 75.4 65.6 39.6 32.8 26.2 —
1/3 1800 1.371.190.690.600.48— 900 77.467.340.733.727.0—
1200 1.83 1.59 0.92 0.80 0.64 — 30 3600 84.8 73.7 44.4 36.8 29.4 —
900 2.07 1.80 1.04 0.90 0.72 — 1800 86.9 75.6 45.7 37.8 30.2 —
1/2 1800 1.98 1.72 0.99 0.86 0.69 — 1200 90.6 78.8 47.6 39.4 31.5 —
1200 2.47 2.15 1.24 1.08 0.86 — 900 94.1 81.8 49.5 40.9 32.7 —
900 2.74 2.38 1.38 1.19 0.95 — 40 3600 111 96.4 58.2 48.2 38.5 —
3/4 1800 2.83 2.46 1.42 1.23 0.98 — 1800 116 101 61.0 50.4 40.3 —
1200 3.36 2.92 1.69 1.46 1.17 — 1200 117 102 61.2 50.6 40.4 —
900 3.753.261.881.631.30— 900 121 105 63.252.241.7—
1 3600 3.22 2.80 1.70 1.40 1.12 — 50 3600 138 120 72.9 60.1 48.2 —
1800 4.09 3.56 2.06 1.78 1.42 — 1800 143 124 75.2 62.2 49.7 —
1200 4.32 3.76 2.28 1.88 1.50 — 1200 145 126 76.2 63.0 50.4 —
900 4.954.302.602.151.72— 900 150 130 78.565.052.0—
1-1/2 3600 5.01 4.36 2.64 2.18 1.74 — 60 3600 164 143 86.8 71.7 57.3 —
1800 5.59 4.86 2.94 2.43 1.94 — 1800 171 140 90.0 74.5 59.4 —
1200 6.07 5.28 3.20 2.64 2.11 — 1200 173 150 91.0 75.0 60.0 —
900 6.445.603.392.802.24— 900 177 154 93.177.061.5—
2 3600 6.44 5.60 3.39 2.80 2.24 — 75 3600 206 179 108 89.6 71.7 —
1800 7.36 6.40 3.87 3.20 2.56 — 1800 210 183 111 91.6 73.2 —
1200 7.87 6.84 4.14 3.42 2.74 — 1200 212 184 112 92.0 73.5 —
900 9.097.904.773.953.16— 900 222 193 117 96.577.5—
3 3600 9.598.345.024.173.34— 100 3600 — 231 140 115 92.2—
1800 10.8 9.40 5.70 4.70 3.76 — 1800 — 236 144 118 94.8 23.6
1200 11.7 10.2 6.20 5.12 4.10 — 1200 — 239 145 120 95.6 24.2
900 13.1 11.4 6.90 5.70 4.55 — 900 — 252 153 126 101 24.8
5 3600 15.513.58.206.765.41— 125 3600 — 292 176 146 116 —
1800 16.6 14.4 8.74 7.21 5.78 — 1800 — 293 177 147 117 29.2
1200 18.2 15.8 9.59 7.91 6.32 — 1200 — 298 180 149 119 29.9
900 18.3 15.9 9.60 7.92 6.33 — 900 — 305 186 153 122 30.9
7-1/2 3600 22.4 19.5 11.8 9.79 7.81 — 150 3600 — 343 208 171 137 —
1800 24.7 21.5 13.0 10.7 8.55 — 1800 — 348 210 174 139 34.8
1200 25.1 21.8 13.2 10.9 8.70 — 1200 — 350 210 174 139 35.5
900 26.5 23.0 13.9 11.5 9.19 — 900 — 365 211 183 146 37.0
10 3600 29.2 25.4 15.4 12.7 10.1 — 200 3600 — 452 257 226 181 —
1800 30.8 26.8 16.3 13.4 10.7 — 1800 — 458 265 229 184 46.7
1200 32.2 28.0 16.9 14.0 11.2 — 1200 — 460 266 230 184 47.0
900 35.1 30.5 18.5 15.2 12.2 — 900 — 482 279 241 193 49.4
15 3600 41.9 36.4 22.0 18.2 14.5 — 250 3600 — 559 338 279 223 —
1800 45.1 39.2 23.7 19.6 15.7 — 1800 — 568 343 284 227 57.5
1200 47.6 41.4 25.0 20.7 16.5 — 1200 — 573 345 287 229 58.5
900 51.2 44.5 26.9 22.2 17.8 — 900 — 600 347 300 240 60.5
20 3600 58.0 50.4 30.5 25.2 20.1 — 300 1800 — 678 392 339 271 69.0
1800 58.9 51.2 31.0 25.6 20.5 — 1200 — 684 395 342 274 70.0
1200 60.7 52.8 31.9 26.4 21.1 — 400 1800 — 896 518 448 358 91.8
900 63.1 54.9 33.2 27.4 21.9 — 500 1800 — 1110 642 555 444 116