Required Cable Cross-Sections For Line And Motor Connections - Siemens SINAMICS G130 Engineering Manual

Parallel-connected converters
Out- Converter Weight
put
SINAMICS (Stan-
G150 dard
Version A model)
Type
[kg]
[kW] 6SL3710-...
380 V – 480 V 3AC
630 2GE41-1AA0 1700
710 2GE41-4AA0 1700
900 2GE41-6AA0 2130
500 V – 600 V 3AC
630 2GF38-6AA0 1700
710 2GF41-1AA0 1700
1000 2GF41-4AA0 2620
660 V – 690 V 3AC
1000 2GH41-1AA0 1700
1350 2GH41-4AA0 2620
1500 2GH41-5AA0 2700
Note:
The recommended and maximum conductor cross-sections relate to the appropriate partial converter of the parallel-
connected converter.
1) 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.

Required cable cross-sections for line and motor connections

It is always advisable to use shielded, symmetrical, 3-wire three-phase cables or to connect several cables of this
type in parallel if necessary. There are basically two reasons for this choice of cable:
This is the only way in which the high IP55 degree of protection can be achieved for the motor terminal box without
problems because the cables enter the terminal box via glands and the number of possible glands is limited by the
geometry of the terminal box. Therefore single cables are less suitable.
With symmetrical, 3-wire, three-phase cables, the summed ampere-turns over the cable outer diameter are equal to
zero and they can be routed in conductive, metal cable ducts or racks without any significant currents (ground current
or leakage current) being induced in these conductive, metal connections. The danger of induced leakage currents
and thus of increased cable-shield losses increases with single-wire cables.
The required cable cross-section depends on the amperage which flows through the cable. The permissible current
loading of cables is defined e.g. in DIN VDE 0298 Part 2/DIN VDE 0276-1000. It depends on ambient conditions such
as the temperature, but also on the routing method. It depends whether cables are routed singly and therefore
relatively well ventilated, or whether groups of cables are routed together. In the latter instance, the cables heat one
another and are therefore far less well ventilated. Reference should be made to the corresponding reduction factors
for such conditions as specified in DIN VDE 0298 Part 2 / DIN VDE 0276-1000. With an ambient temperature of
40 °C, the cross-sections of copper cables can be based on the following table.
Line supply connection
Recom- Maximum cable
mended cross-section
cross-
1)
section
NEC, CEC
DIN
DIN VDE
VDE
2
2
[mm ] AWG/MCM
[mm ]
2x240 4x240 4x500
3x185 4x240 4x500
3x240 8x240 8x500
2x185 4x240 4x500
2x240 4x240 4x500
3x185 8x240 8x500
2x240 4x240 4x500
3x185 8x240 8x500
4x150 8x240 8x500
Motor connection
M12 Recom- Maximum cable
fixing mended cross-section
screw cross-
1)
section
(no. of
DIN
holes) DIN VDE
VDE
2
[mm ] 2
[mm ]
(2) 2x185 4x240
(2) 2x240 4x240
(4) 2x240 4x240
(2) 2x150 4x240
(2) 2x185 4x240
(4) 2x240 6x240
(2) 2x185 4x240
(4) 3x150 6x240
(4) 3x185 6x240
SINAMICS Engineering Manual - May 2008
SINAMICS G150
Engineering Information
Cabinet
grounding
M12 fixing M12 fixing
screw screw
(no. of (no. of
holes) holes)
NEC, CEC
AWG/MCM
4x500 (2) (2)
4x500 (2) (10)
4x500 (2) (16)
4x500 (2) (2)
4x500 (2) (2)
6x500 (3) (18)
4x500 (2) (2)
6x500 (3) (18)
6x500 (3) (18)
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