(19)
(11) EP 2 535 916 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.03.2013 Bulletin 2013/11

(43) Date of publication A2:
19.12.2012 Bulletin 2012/51

(21) Application number: 12172356.3

(22) Date of filing: 18.06.2012
(51) International Patent Classification (IPC): 
H01H 71/12(2006.01)
H01H 83/20(2006.01)
 H01H 71/24(2006.01)
(84) Designated Contracting States:
AL 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 RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 17.06.2011 US 201113162852

(71) Applicant: Rockwell Automation Technologies, Inc.
Mayfield Heights, OH 44124 (US)

(72) Inventors:
  • Annis, Jeffrey
    Waukesha, WI Wisconsin 53189 (US)
  • Weichert, Hans
    5722 Gränichen (CH)
  • Benz, Pascal
    5000 Aarau (CH)
  • Liberto, Sandro
    5032 Aarau Rohr (CH)
  • Villinger, Beat
    5001 Aarau (CH)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser 
Leopoldstrasse 4
80802 München
80802 München (DE)

   


(54) Improved magnetic core coupling in a current transformer with integrated magnetic actuator


(57) A system comprising a magnetic actuator, a current transformer and operational electronics in a dual-coil circuit breaker. The system includes an inline, but non concentric, implementation of the primary and secondary coils to maintain a narrow width suitable for retrofitting in standard industrial rack mounted enclosures. The system further comprises an I-shaped lamination stack that is designed to abut on the ends of an upper and lower plate of the current transformer. The I-shaped lamination stack significantly increases the overlap between the lamination and the upper and lower plates, which results in lower magnetic reluctance and improves magnetic coupling.







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Search report