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Formuale and Tables

Standard Units Cascading Specifications
IP Codes

Standard F.L.C data for 4 Pole Motors

Rated Power
3 phase motor
Star-Delta
Single phase motor
KW
HP
Amp (380V)
Amp(380V)
Amp(230V)
0.37
0.5
1
-
3.4
0.75
1
2
-
5.8
1.5
2
3.5
-
11.2
2.2
3
5
-
16.4
4
5.5
8.5
4.9
28
5.5
7.5
11.5
6.7
37
7.5
10
15.5
9
-
15
20
30
17.4
-
22
30
44
25
-
37
50
72.5
42
-

 

Formulae

Ohms Law : I (A) = V (Volts) / R (Ohms)

Power(Watts) = V (Volts) / I (A)

Power(Watts) = I squared(A) x R (Ohms)

Reactive Impedance(XL) = 2pi x f l

 

Cable
Current Ratings (Amps)
Impedance
Volt Drop
Short Circuit
mm
Ground
Ducts
Air
Ohm/Km
mV/A/m
KA
1.5
23
18
18
14.46
25.10
0.14
2.5
30
24
24
8.87
15.36
0.24
4
38
31
32
5.52
9.56
0.38
6
48
39
40
3.69
6.39
0.57
10
64
52
54
2.19
3.80
0.98
16
82
67
72
1.38
2.40
1.53
25
126
101
113
0.87
1.52
2.40
35
147
120
136
0.63
1.10
3.86
50
176
144
167
0.47
0.82
4.80
70
215
175
207
0.33
0.58
6.72
95
257
210
253
0.24
0.43
9.12
120
292
239
293
0.20
0.35
11.52
150
328
369
336
0.16
0.29
14.40
185
369
303
384
0.14
0.25
17.76
240
422
348
447
0.12
0.21
23.04
300
472
397
509
0.10
0.18
28.80

These tables are to assist the electrical trade and are as such a rough guide and no responisbility will be accepted for incorrect application.