LEESON Electric Corporation

ELECTRIC MOTORS, GEARMOTORS AND DRIVES


Conversions/Formulas

 
Temperature Conversion Table
Locate known temperature in C / F column. Read converted temperature in C or F column.
º C º C / º F º F º C º C / º F º F º C º C / º F º F
-45.4 -50 -58 15.5 60 140 76.5 170 33
-42.7 -45 -49 18.3 65 149 79.3 175 347
-40 -40 -40 21.1 70 158 82.1 180 356
-37.2 -35 -31 23.9 75 167 85 185 365
-34.4 -30 -22 26.6 80 176 87.6 190 374
-32.2 -25 -13 29.4 85 185 90.4 195 363
-29.4 -20 -4 32.2 90 194 93.2 200 392
-26.6 -15 5 35 95 203 96 205 401
-23.8 -10 14 37.8 100 212 98.8 210 410
-20.5 -5 23 40.5 105 221 101.6 215 419
-17.8 0 32 43.4 110 230 104.4 220 428
-15 5 41 46.1 115 239 107.2 225 437
-12.2 10 50 48.9 120 248 110 230 446
-9.4 15 59 51.6 125 257 112.8 235 455
-6.4 20 68 54.4 130 266 115.6 240 464
-3.4 25 77 57.1 135 275 118.2 245 473
-1.1 30 86 60 140 284 120.9 250 482
1.7 35 95 62.7 145 293 123.7 255 491
4.4 40 104 65.5 150 302 126.5 260 500
7.2 45 113 68.3 155 311 129.3 265 509
10 50 122 71 160 320 132.2 270 518
12.8 55 131 73.8 165 329 136 275 527
 
ºF = (9/5 x oºC) + 32
ºC = 5/9 (ºF - 32)
 
Mechanical Characteristics
 
To Find: Use:
Torque in Pound Feet HP x 5250
RPM
Horsepower Torque x RPM
5250
RPM 120 x Frequency
Number of Poles
 
Electrical Characteristics
To Find: Use Single Phase: On Three Phase:
Amperes Knowing HP HP x 746
E x Eff x PF
HP x 746
1.73 x E x Eff x PF
Amperes Knowing kW kW x 1000
E
kW x 1000
1.73 x E x PF
Amperes Knowing kVA kVA x 1000
E
kVA x 1000
1.73 x E
Kilowatts I x E x PF
1000
1.73 x I x E x PF
1000
kVA I x E
1000
1.73 x I x E
1000
HP (output) I x E x Eff x PF
746
1.73 x I x E x Eff x PF
746
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