ELECTRIC MOTORS

The table below can be used for selection of suitable fuses when providing power to most electric motors running at 415 Volts.

Prior to using the table please see the notes below.

Motor Kw

Horse Power
Full Load Amps

Fuse for DOL Start

Fuse for Assisted Start

0.37
0.5
1.05
4
2
0.55
0.75
1.44
6
4
0.75
1
1.9
6
4
1.1
1.5
2.5
10
6
1.5
2
3.45
16
10
2.2
3
4.7
16
10
3
4
6.2
20
16
4
5.5
8.1
25*
16
5.5
7.5
10.9
32
20
7.5
10
14.8
35
25
11
15
20.5
50
32
15
20
28
63
35
18.5
25
34.5
80*
40
22
30
41
80*
63
30
40
55
100*
80
37
50
65
125*
80
45
60
79
160*
100
55
75
98
200*
125
75
100
133
250*
160
90
120
154
250*
160
110
150
188
315*
200
132
175
226
355*
250
150
200
253
355*
315
160
215
268
355*
315
200
270
358
450*
400
220
300
385
500
450
240
320
428
560
450
250
350
450
560
500
280
375
488
560
560
300
400
525
630
560
320
425
538
630
630

Notes :-

Certain duties such as large sweep fans or high inertia loads can drastically affect motor starting current and times. In these cases this table is not suitable.

If you require further assistance please contact us by email.

The average efficiency of an electric motor is 85%

* Motor rated fuse is usually available.

This table is to be used as a guide only, further calculations may be required.