Applications
3.5 DC network applications of 3VA molded case circuit breakers
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
175
Recommended circuit configurations for DC systems
GF Ground-fault monitoring
1)
Ue > 250 V DC: DC insulating plate is mandatory for sizes 3VA10 and 3VA11 with a non-insulated mounting plate
(see chapter Insulating measures (Page 246))
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 two conducting paths in series in a circuit with 3-
pole molded case circuit breakers, and three conducting paths in series in a circuit with 4-
pole molded case circuit breakers.
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