Download Siemens Model 240 Installation manual

Installing/Mounting
4.2 Electrical Installation
TN-C-S Power System
L1
L2
L3
N
PE
PEN
L1
L2
L3
Exposed Conductive Parts
Figure 4-3
TN-C-S power system
In a TN-C-S power system, the neutral and protective functions are combined in a single part
of the system.
TN-C Power System
L1
L2
L3
PEN
L1
L2
L3
Exposed Conductive Parts
Figure 4-4
TN-C power system
In a TN-C power system, the neutral and protective functions are combined in a single
conductor throughout the system.
4-6
Power Modules PM240
Hardware Installation Manual, 2006-04-04, A5E00807525B AA