What is the difference between standard Masterpact NW and NT breakers and Masterpacts with LF and L1 ratings?

Product Line:
Masterpact NW

Resolution:
Masterpact L1F and LF NW breakers use the same trip units as the standard breakers. The difference is in the design of the arc chamber. The current path has a reverse current loop which passes current in one direction through the stationary terminal and moveable contact arm in opposite directions. This creates a strong repulsive force resulting in quick contact opening before the breaker trips and it also magnetically forces the arc into the arc plates to segment and cool the arc with the effect of reducing arc energy. They do NOT use fuses.

Released for: Schneider Electric USA