Title:
CIRCUIT BREAKER FOR SINGLE-PHASE THREE WIRE SYSTEM
Document Type and Number:
Japanese Patent JP2001325872
Kind Code:
A
Abstract:
To provide a circuit breaker for a single-phase three-wire system, having a structure to ensure that a neutral pole makes earlier and breaks later.
An electromagnetic type drawing-out device, consisting of an electromagnetic coil, a yoke piece, an oil dash pot and a moving electromagnetic piece, is provided, and a base end 1a of a moving contactor 1 is constituted so as to be supported at a lower end 9a of the yoke piece 9. The lower end 9a of the yoke piece of the neutral pole is heeled higher than lower ends of the yoke pieces of the other poles by 0.5 mm.
Inventors:
SUZUKI SATOSHI
Application Number:
JP2000145298A
Publication Date:
November 22, 2001
Filing Date:
May 17, 2000
Export Citation:
Assignee:
KAWAMURA ELECTRIC INC
International Classes:
H01H73/38; (IPC1-7): H01H73/38
Attorney, Agent or Firm:
Ishida Kiki
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