Recommended Circuit Configurations For Dc Systems - Siemens 3VA1 100 A Manual

3.3.4

Recommended circuit configurations for DC systems

GF Ground-fault monitoring
Ue > 250 V DC: DC insulating plate is mandatory for sizes 3VA10 and 3VA11 with a non-insulated mounting plate
1)
(see chapter Insulating equipment (Page 191))
Note
DC 2-pole (all-pole disconnection), grounded system
The grounded pole must always be assigned to the individual conducting path, so that in the
event of a ground fault there are always 2 conducting paths in series in a circuit with 3-pole
molded case circuit breakers, and 3 conducting paths in series in a circuit with 4-pole molded
case circuit breakers.
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02
3.3 DC network applications of the 3VA molded case circuit breaker
Applications
135