(19)
(11) EP 0 399 282 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.01.1992 Bulletin 1992/04

(43) Date of publication A2:
28.11.1990 Bulletin 1990/48

(21) Application number: 90108624.9

(22) Date of filing: 08.05.1990
(51) International Patent Classification (IPC)5: H01H 73/04
(84) Designated Contracting States:
BE DE ES FR GB

(30) Priority: 25.05.1989 IT 2064289

(71) Applicant: BTICINO S.r.l.
I-20122 Milan (IT)

(72) Inventors:
  • Fabrizi, Fabrizio
    I-24100 Bergamo (IT)
  • Pianezzola, Sergio
    I-21100 Calcinate del Pesce, Varese (IT)

(74) Representative: Perani, Aurelio et al
c/o JACOBACCI & PERANI S.p.A Via Visconti di Modrone, 7
20122 Milano
20122 Milano (IT)


(56) References cited: : 
   
       


    (54) An automatic magneto-thermal protection switch having a high breaking capacity


    (57) An automatic, high breaking capacity magneto-thermal protection switch or breaker of a type comprising a control key (3), a toggle mechanism (16) associated with the key, at least one moving contact (19) driven by the mechanism to rock toward and away from a fixed contact (18) facing a de-ionization chamber (30) and respective cell (29), and an amperometric protection coil (9) having a moving armature (12) arranged to act on said mechanism, further comprises a rocking striker (32) having one end (33) inserted in the path of movement of a breaker arm-like lug (35) on said armature and the opposite end arranged to act on said moving contact (19) in abutment relationship to speed up the contact opening movement by the time of automatic operation.







    Search report