What does B,C,D curve mean for Acti 9 MCB?
B Curve means the MCB trips between 3-5 times full load current. It is mainly used in residential applications where loads are resistive e.g. lighting fixtures, domestic appliances with low surge Levels.
C Curve means the MCB trips between 5-10 times full load current. It is used in commercial/industrial applications where there is greater chances of higher short circuit currents e.g. mainly inductive loads , fluorescent lighting.
D Curve means the MCB trips between 10-14 times full load current. It is used where inrush currents can be very high e.g. motors, X-ray machines.
Here is the curves diagram:
C Curve means the MCB trips between 5-10 times full load current. It is used in commercial/industrial applications where there is greater chances of higher short circuit currents e.g. mainly inductive loads , fluorescent lighting.
D Curve means the MCB trips between 10-14 times full load current. It is used where inrush currents can be very high e.g. motors, X-ray machines.
Here is the curves diagram:
Released for: Schneider Electric Australia
Need help?
Product Selector
Quickly and easily find the right products and accessories for your applications.
Get a Quote
Start your sales inquiry online and an expert will connect with you.
Where to buy?
Easily find the nearest Schneider Electric distributor in your location.
Help Centre
Find support resources for all your needs, in one place.