(19)
(11) EP 1 017 079 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.08.2001 Bulletin 2001/35

(43) Date of publication A2:
05.07.2000 Bulletin 2000/27

(21) Application number: 99204054.3

(22) Date of filing: 01.12.1999
(51) International Patent Classification (IPC)7: H01H 83/12
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 29.12.1998 IT MI982847

(71) Applicant: ABB Ricerca SpA
20099 Sesto San Giovanni (MI) (IT)

(72) Inventors:
  • Jacovino, Elio
    20052 Monza (MI) (IT)
  • Redaelli, Claudio
    20063 Seveso (MI) (IT)

(74) Representative: Giavarini, Francesco 
ABB Ricerca S.p.A. Viale Edison, 50
20099 Sesto San Giovanni (MI)
20099 Sesto San Giovanni (MI) (IT)

   


(54) Auxiliary device for circuit breakers


(57) An auxiliary device for opening a circuit breaker associated therewith if the supply voltage is lower than a threshold, comprising an insulating enclosure which contains a fixed magnet on which a coil is wound, a moving magnet and connecting terminals, further comprising:
  • actuation means which are operatively connected to and actuated by the moving magnet;
  • a kinematic chain operatively connected to said actuation means;
  • means for coupling to the circuit breaker which are operatively connected to the kinematic chain;
  • means for the local visual indication of the open state of the circuit breaker due to a condition of supply voltage lower than a threshold, actuated by said actuation means.






Search report