Function

Protection of circuits against short-circuit currents, 
Protection of circuits against overload currents, 
Switch, 
Isolation, 
Circuit-breakers are used in domestic installation, as well as in commercial and industry electrical distribution systems.

Selection

Technical data of the network at the point considered: 
the earthing systems (TNS, TNC), 
Short-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device, 
Network normal voltage. 
Tripping curves:
B curve (3-5In) protection for people and big length cables in TN and IT systems.
C curve (5-10In) protection for resistive and inductive loads with low inrush current.
D curve(10-14In) protection for circuits which supply loads with high inrush (LV/LV transformers, breakdown lamps).

Technical data



Tripping Curve