Siemens SENTRON 3VL System Manual page 57

● Connection of the network to current path 1-2 and 3-4 (any incoming supply side) or
● connection of the network to current path 1-2 and N; however, a jumper is required here
from N to current path 3-4 (on the input or output side)
Figure 5-3
Note
Single-pole load
Series connection of the current paths is not necessary in the case of single-pole load
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
4-pole RCD
Functions
5.1 Current protection
57