Connecting The Grounding Conductor; Minimum Surface Area Of Grounding Conductor; Grounding Connection Type - Siemens SIMOTICS SD 1LE5 Operating Instructions Manual

Observe the documentation for tightening torques of the cable entries and sealing plugs for
direct mounting at the machine as well as additional glands (e.g. adapters).
6.4

Connecting the grounding conductor

The machine's grounding conductor cross-section must comply with EN / IEC 60034-1.
Please also observe installation regulations such as those specified in EN / IEC 60204-1.
Basically, there are two ways of connecting a grounding conductor to the machine.
• Internal grounding with a connection in terminal box at the location intended for this
purpose and marked accordingly.
• External grounding with connection at the stator housing at the locations intended for
this purpose and marked accordingly.
6.4.1

Minimum surface area of grounding conductor

Table 6- 3
Minimum cross-section of the phase conductor
6.4.2

Grounding connection type

Enclosure grounding method
Connection of an individual conductor under
the external grounding bracket.
Connection is made using a DIN cable lug
under the external grounding bracket. DIN
46 234
1LE5, 1PC4 shaft height 315/355
Operating Instructions, 10/2020, A5E41454666A
Minimum cross-sectional area of grounding conductor
for installation
S
[mm²]
S ≤ 25
25 < S ≤ 50
S > 50
Electrical connection
6.4 Connecting the grounding conductor
Minimum cross-section of the associated
grounding connection
[mm²]
S
25
0.5 S
Cable cross-section
M8
M12
M8
M12
[mm²]
120
150
120
150
67