ABB Selective main circuit breakers S 750 series
Selective main circuit breakers S 750 series The technology
Brief description
Selective main circuit breakers of the S 750 series fully
comply with E DIN VDE 0641-21. They operate voltage
independent, i.e. their function does not depend on auxilary
source (SHU). They are designed for mounting onto 40 mm
busbar systems (4- or 5-pole, 5/10 mm x 12 mm).
Independant of current rating of S 750. short circuit
discrimination of up to 10.000 A or even higher is available
for the downstream circuit-breakers.
The short-circuit capacity of the S 750 is 25 kA
(system voltage 230/400 V AC) throughout the entire range
of rated current.
Due to its particular current-limiting selectivity features,
STOTZ selective main circuit breakers support downstream
circuit-breakers in limiting the energy when a short circuit
occurs, thus reducing the load on the back-up fuse and the
entire electrical installation.