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The position of the releases on the front, with magnetic turns and opposing arc chute chambers, allows a notable reduction in arc time and short-circuit strain on the mechanism
It has therefore been possible to halve the system and lighten the mechanism, which has short pre-arc times thanks to the reduced energy
The new mechanism has been sized and optimised by means of a sophisticated planning, engineering and testing programme
Manual control lever with a position coherent with the contacts, allowing the circuit breaker to be used as a switch disconnector (in compliance with Standard CEI 64-8)
Toggle joint tripping mechanism with tripping accelerator for short-circuit condition
Electromagnets for instantaneous short-circuit tripping
Silver-graphite contacts to maintain electrical characteristics over time
Magnetic turns in the arc chute chambers
Arc chute chambers with 12 reeds in a ferromagnetic material
Shell-type terminals with anti-loosening tightening system