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.
If there is no possibility of a double ground fault occurring, or if any ground fault that does occur is dealt with immediately
(ground-fault monitoring), 500 V will be the maximum permissible direct voltage. In a non-grounded system, all poles must
Further circuits are available on request.
Ue > 250 V DC: DC insulating plate is mandatory for sizes 3VA10 and 3VA11 with a non-insulated mounting plate (see chapter