Grounding And Pe Conductor Cross-Section - Siemens SINAMICS G130 Engineering Manual

SINAMICS G150
Engineering Information
Cross-section
Single routing
of
3-wire cable
2
[mm ]
3 x 2.5
3 x 4.0
3 x 6.0
3 x 10
3 x 16
3 x 25
3 x 35
3 x 50
3 x 70
3 x 95
3 x 120
3 x 150
3 x 185
3 x 240
1)
Maximum 9 cables routed horizontally in direct contact with one another on a cable rack
Current-carrying capacity of PVC-insulated, 3-wire copper and aluminum cables with a maximum permissible conductor
temperature of 70°C at an ambient temperature of 40°C according to IEC 60364-5-52
With higher amperages, cables must be connected in parallel.
Note:
The recommendations for the North American market in AWG or MCM must be taken from the appropriate NEC
(National Electrical Code)/CEC (Canadian Electrical Code) standards.
5.4.3

Grounding and PE conductor cross-section

The PE conductor must be dimensioned to meet the following requirements:
· In the case of a ground fault, no impermissibly high contact voltages resulting from voltage drops on the PE
conductor caused by the ground fault current may occur (< 50 V AC or < 120 V DC, IEC 61800-5-1, IEC 60 364,
IEC 60 543).
· The PE conductor should not be excessively loaded by any ground fault current it carries.
· If it is possible for continuous currents to flow through the PE conductor when a fault occurs, the PE conductor
cross-section must be dimensioned for this continuous current.
· The PE conductor cross-section should be selected according to EN 60 204-1, EN 60 439-1, IEC 60 364.
Cross-section of the phase
conductor
2
mm
Up to 16
16 to 35
35 and above
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Copper cable
Groups of cables
routed in parallel
[A] [A]
22 17
30 23
37 29
52 41
70 54
88 69
110 86
133 104
171 133
207 162
240 187
278 216
317 247
374 292
Minimum cross-section of the external PE
conductor
Minimum phase conductor cross-section
Minimum half the phase conductor cross-section
Single routing
1)
[A]
17
23
29
40
53
68
84
102
131
159
184
213
244
287
2
mm
16
Aluminum cable
Groups of cables
routed in parallel
[A]
13
18
22
31
41
53
65
79
102
124
144
166
190
224
1)