| 摘要 |
<p>1. Electrical equipment for terminal distribution having a plurality of output conductors (30 ; 217), supplied by a common input conductor, each output conductor being protected by a branch current-breaking apparatus (24 ; D1-Dn), said common input conductor comprising a main protection apparatus (44 ; 44, 52 ; DG) having a protection device (46 ; 222) against short-circuits, each of said apparatus being manually controlled, characterized in that said main protection apparatus (44 ; 44, 52 ; DG) and branch apparatus (24 ; D1-Dn) are incorporated in the same output functional assembly (22 ; 238) containing the connection conductors between a branch apparatus and main apparatus, each branch apparatus having only a protection device (38 ; C1-Cn) against overloads and said main apparatus having only a protection device (46 ; 222) against short-circuits, the threshold of which can be limited to a value, approaching the sum of the rated currents of branch apparatus, the protection against short-circuits of said branch apparatus (24 ; D1-Dn) and associated output (217) being secured by said main apparatus (44 ; 44, 52 ; DG), foreseeing a coordination between main apparatus and branch apparatus, in order that, on one hand, a branch apparatus has an electrodynamic and thermal level compatible with maximum short-circuit current limited by main apparatus and that, on the other hand, the auto-protection limit of the protection device (38 ; C1-Cn) against overloads of branch apparatus (24 ; D1-Dn) is at least equal to the intervention threshold of protection device (46 ; 222) against short-circuits of main apparatus (44 ; 44, 52 ; DG).</p> |
