(19)
(11) EP 2 175 468 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.09.2013 Bulletin 2013/36

(43) Date of publication A2:
14.04.2010 Bulletin 2010/15

(21) Application number: 09171337.0

(22) Date of filing: 25.09.2009
(51) International Patent Classification (IPC): 
H01H 83/22(2006.01)
 H01H 83/14(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
AL BA RS

(30) Priority: 10.10.2008 IT MI20080329 U

(71) Applicant: ABB S.p.A.
20124 Milano (IT)

(72) Inventors:
  • Paleari, Ivan
    20023, Cerro Maggiore (MI) (IT)
  • Villani, Andrea
    20081, Abbiategrasso (MI) (IT)
  • Chiaravalli, Matteo
    21020, Daverio (VA) (IT)
  • Tinelli, Marco
    20127, Milano (IT)
  • Abbattista, Tommaso
    20162, Milano (IT)
  • Antoniazzi, Alberto
    20080, Zibido San Giacomo (MI) (IT)

(74) Representative: De Santis, Giovanni 
ABB S.p.A. Via L. Lama, 33
20099 Sesto San Giovanni (MI)
20099 Sesto San Giovanni (MI) (IT)

   


(54) Bipolar automatic circuit breaker for low-voltage applications


(57) A low-voltage bipolar automatic circuit breaker comprising a couple of electrical poles each of which has a device for protection against short-circuits. The circuit breaker further comprises a differential protection device associated with both poles and a single overload protection device associated with one of the two poles which causes the tripping of a closing/opening kinematic mechanism and the consequent opening of the contacts of the two poles upon detection of an overload fault condition.







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