(19)
(11) EP 0 206 249 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.01.1988 Bulletin 1988/03

(43) Date of publication A2:
30.12.1986 Bulletin 1986/52

(21) Application number: 86108334

(22) Date of filing: 19.06.1986
(84) Designated Contracting States:
DE FR GB

(30) Priority: 25.06.1985 JP 9813585

(71) Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
 ()

(72) Inventors:
  • Yamagata, Shinji Mitsubishi Denki K.K.
     ()
  • Takatsuka, Takuo Mitsubishi Denki K.K.
     ()
  • Sato, Hitoshi Mitsubishi Denki K.K.
     ()

   


(54) Circuit breaker


(57) In a circuit breaker, which has fixed pressure reflector (3) and moving pressure reflector (5) respectively around its fixed contact point (1b) and moving contact point (4b) and an insulation barrier (6) for isolating a power source side space (P) and a load side space (L) thereby, at least one oblong protrusion is provided along the foot part (6c) of the insulation barrier (6); thereby undesirable flow of conductive powder from the contacts are prevented and insulation characteristic between the power source side space (P) and a load side space (L) is much improved.






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