ABB Selective main circuit breakers S750 series Applications
STOTZ selective main circuit breakers fully comply with
the requirements of the German utilities directive (Technical
Connection Requirements of Network Operators) concerning
the mandatory pre-meter isolation and protection functions.
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.