59 - PVD3627-August 2011
3.7. Power electrical connection
3.7.1. Wires sizes
In every country, you must respect all the local electrical installation
regulations.
Not limiting example in France: NFC 15-100 or CEI 60364 as well in Europe.
Cable selection depends on the cable construction, so refer to the cable
technical documentation to choose wire sizes
Some drives have cable limitations or recommendations; please refer to the
drive technical documentation for any further information.
Cable selection
At standstill, the current must be limited at 80% of the low speed current I
o
.
And the cable has to support the peak current for a long period. So, if the
motor works at standstill, the current to select the right wire size is
√
2 x 0.8 Io
≅
1,13 x I
o
.
Sizes for H07 RN-F cable at 40°C
Section
I
max
Resistance
[mm²]
[A
rms
]
[
Ω/Κ
m]
4
23
4.250
6
30
2.833
10
40
1.700
16
54
1.063
25
71
0.680
35
87
0.486
50
106
0.340
70
134
0.243
95
163
0.179
120
189
0.142
150
217
0.113
185
247
0.092
240
291
0.071
300
334
0.057
