MONO-PHASE AND THREE-PHASE EXTERNAL VIBRATORS
7
en
VET VEM
4.5 PROCEDURE TO DETERMINATE THE NECESSARY CROSS SECTION IN CABLE
EXTENSION
Do the following verifications and take the highest section of cable:
1.
The ohmic resistance and inductive resistance of the cable with the permitted loss of
voltage of 5%, cosphi=0.8 trough the frequency and voltage curve
I.e.
Voltage nominal:
1- 220 V 50 Hz
Nominal current:
10 A
Cable length:
100 m
Entering the curve with the product: Intensity x Length=10x100=1000 Am
We obtain a 4 mm section
2.
The permitted heating of the cable according to VDE standard (minimum transversal
section table required).
I. e.
For 10 A, according to table for 15 A or less, the section is of 1 mm.
Therefore, the section chosen is equal to 4 mm, Always choose the highest transversal
section of the two verifications
Therefore, Chosen section = 4 mm, always choose the larger cross section of the two
checks.
Section (mm
2
)
Max. load (A)
Maximun fuse. (A)
1
15
10
1,5
18
10/3-16/1-
2,5
26
20
4
34
25
6
44
35
10
61
50
16
82
63
25
108
80
Minimum sections according to VDE standards
