For these applications, selective main circuit breakers:

●  ensure load current carrying capability over a large temperature range;

●  protect cables in the case of functional overload;

●  protect cables in the case of a short circuit;

●  clear high short-circuit currents reliable;

●  limit the let-through current and let-through energy also in the case of selective short-circuit

disconnection by downstream mcb

●  provide disconnection and re-connection of installation, also by ordinary people;

●  provide selectivity with respect to downstream circuit-breakers and upstream fuses;

●  ensure highest availibility of electrical power supply for the customer.