Title:
CIRCUIT BREAKER
Document Type and Number:
Japanese Patent JP3506052
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a breaker that hardly short-circuits between electrodes by forming two exhaust holes for exhausting gas by arc generated when a movable contact opens and separates from a fixed contact in two upper and lower stages in the height direction of an apparatus body.
SOLUTION: In an end surface under an electric wire insertion hole 16A and an electric wire insertion hole 16B, an apparatus-body mounting locking-hole 112 and an exhaust hole 109, which exhausts gas generated by opening or closing for a fixed contact and a movable contact that are arranged in a partition on the inside and lower side of two partitions divided by side walls of a first side case 1A and a second side case 1B and an intermediate case, are opened. An exhaust hole 110 for diagonally upward exhausting gas generated by opening or closing for the fixed contact and the movable contact that are arranged in an upside partition is opened in the upper surface of the other end of an apparatus body 1. These exhaust holes 109, 110 separate upside and downside, and directions facing to the outside of the apparatus body 1 provide an angle at which they separate from each other. Therefore, discharge directions of arcs generated in forced electrode opening time differ from each other to prevent inter-electrode short circuit caused by mixing of the arcs of both electrodes.
Inventors:
Akihiko Hirao
Tomoyuki Sawada
Takehiko Okada
▲高▼山 晋治
Takuya Kagawa
Kenichiro Shimizu
Toshihiro Oido
Takanobu Tanaka
Mizuno Hatsuo
Yoshiya Nakamichi
Tomoyuki Sawada
Takehiko Okada
▲高▼山 晋治
Takuya Kagawa
Kenichiro Shimizu
Toshihiro Oido
Takanobu Tanaka
Mizuno Hatsuo
Yoshiya Nakamichi
Application Number:
JP18092099A
Publication Date:
March 15, 2004
Filing Date:
June 25, 1999
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
H01H73/06; H01H9/34; H01H73/00; (IPC1-7): H01H73/06
Domestic Patent References:
| JP547291A | ||||
| JP1167046A |
Attorney, Agent or Firm:
Keisei Nishikawa (1 person outside)