Motor Current
SELECTION TABLES - Three-Phase Motors
THREE PHASE MOTORS
AC Motors - full load current tables (1450rpm approx.)
(provided as a guide to the selection of suitable MEM control gear).
Approx. F.L.C. at line voltage
Motor
rating
hp
0.1 kW
0.12 kW
0.18 kW
0.25 kW
0.37 kW
0.56 kW
0.75 kW
1.1 kW
1.5 kW
2.2 kW
3.0 kW
3.7 kW
4.0 kW
5.5 kW
7.5 kW
9.3 kW
10 kW
11 kW
15 kW
18 kW
22 kW
30 kW
37 kW
45 kW
55 kW
75 kW
90 kW
110 kW
130 kW
150 kW
1/8
1/6
1/4
1/3
1/2
3/4
1
1.5
2
3
4
5
5.5
7.5
10
12.5
13.5
15
20
25
30
40
50
60
75
100
125
150
175
200
220V ac 240V ac 380V ac 415V ac 550V ac
The tables are based on motors of approximately 1450rpm of average
efficiency and power factor. Motors of higher speed usually take a
lower current than that shown in the table; while motors of lower
speed usually take higher current. Wide variations from these figures
can arise, especially on single phase motors, and engineers should,
whenever possible, determine the actual f.l.c. from the motor rating
plate in each case.
SINGLE PHASE MOTORS
Approx. F.L.C. at line voltage
Motor
rating
hp
0.07 kW
0.1 kW
0.12 kW
0.18 kW
0.25 kW
0.37 kW
0.56 kW
0.75 kW
1.1 kW
1.5 kW
2.2 kW
3 kW
3.7 kW
4 kW
5.5 kW
7.5 kW
1/12
1/8
1/6
1/4
1/3
1/2
3/4
1
1.5
2
3
4
5
5.5
7.5
10
110V ac
220V ac
240V ac
2.4
3.3
3.8
4.5
5.8
7.9
11
15
21
26
37
49
54
60
85
110
1.2
1.6
1.9
2.3
2.9
3.9
5.5
7.3
10
13
19
24
27
30
41
55
1.1
1.5
1.7
2.1
2.6
3.6
5
6.7
9
12
17
22
25
27
38
50
0.7
1
1.3
1.6
2.5
3.1
3.5
5
6.4
9.5
12
15
16
20
27
34
37
41
64
67
74
99
130
147
183
239
301
350
410
505
0.6
0.9
1.2
1.5
2.3
2.8
3.2
4.5
5.8
8.7
11
13
14
19
25
32
34
37
50
62
70
91
119
136
166
219
269
325
389
440
0.4
0.5
0.8
0.9
1.4
1.8
2
2.8
3.7
5.5
7
8
9
12
16
20
22
23
31
39
43
57
75
86
105
138
170
205
245
278
0.4
0.5
0.7
0.9
1.3
1.6
1.8
2.6
3.4
5
6.5
8
8
11
15
18
20
22
28
36
39
52
69
79
96
125
156
189
224
255
0.3
0.3
0.4
0.6
0.8
1.1
1.4
1.9
2.6
3.5
4.7
6
6
8
11
14
15
16
21
26
30
41
50
59
72
95
117
142
169
192
General Conversion Tables
Multiply by
To convert
To convert
Multiply by
Fo
25.4
Inches to millimetres (mm)
0.03937
Millimetres to inches
Kilogrammes to pounds (lb)
Tons (2.240lb) to kilogrammes (kg)
1,016.05
Feet to metres (m)
0.3048
Kilogrammes to tons (2.240 lb)
Metres to feet (ft)
3.2808
Ounces (avoirdupois) to grammes
28.3495
Yards to metres (m)
0.9144
Grammes to ounces (avoirdupois)
0.0353
Metres to yards (yds)
1.0936
Gallons to litres
4.5461
1.69093
Litres to gallons
0.220
0.6214
Force N (Newtons to lb ft
0.225
Square inches to square millimetres (mm2)
645.16
1N = 1kg (mass) accelerated at 1 metre/sec
(inch2)
0.00155
Miles to kilometres (km)
Kilometres to miles
Square millimetres to square inches
Square yards to square metres
(m2)
Square metres to square yards (yds2)
1Nm=1J (Joule) to calorie
0.239
Horsepower to kilowatts (kW)
0.7458
1.196
Kilowatts to horsepower (h.p.)
1.3408
16.387
Cubic centimetres to cubic inches (inch3)
0.06102
Atmospheres to lb per square inch (lb/inch2)
0.4536
1bar = 1kg/cm2=735.6mm Hg=14.2lb/inch2
Pounds to kilogrammes (kg)
0.0009842
0.8361
Cubic inches to cubic centimetres (cm2)
Co
2.2046
1W (watt) = 1J/S
14.68
No liability can be accepted for the data which appears in these pages, its purpose is for guidance ONLY.
212oBP
100
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
32oFP- 30
20
10
0
90
80
70
60
50
40
30
20
10
0
-10
-20