Title:
保護継電器
Document Type and Number:
Japanese Patent JP6780488
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a protective relay having an operation indicator which retains an operation display even when a magnetic pole of an iron core is changed by electromagnetic noise or the like.SOLUTION: An outer frame 230 of an operation indicator 200A houses a bobbin 240 having a coil 260 and an iron core 250 wound with the coil 260. Under a stationary state, a moving part 210 having a permanent magnet 216 is housed in the outer frame 230 by generating a first magnetic force attracting the iron core 250. When an abnormality occurs in a power system, the coil 260 is energized, so that the moving part 210 is horizontally moved by a second magnetic force repelling the iron core 250 and is exposed to the outside of the outer frame 230 for an operation display.SELECTED DRAWING: Figure 4
Inventors:
Kiyozumi Deda
Takashi Kumagai
Masaya Wadasaki
Takashi Kumagai
Masaya Wadasaki
Application Number:
JP2016244407A
Publication Date:
November 04, 2020
Filing Date:
December 16, 2016
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02H3/04
Domestic Patent References:
| JP56152054U | ||||
| JP52058877A | ||||
| JP60174013A |
Foreign References:
| US4466042 |
Attorney, Agent or Firm:
Kanako Murakami
Shigeaki Matsui
Kuratani Yasutaka
Kenro Date
Shigeaki Matsui
Kuratani Yasutaka
Kenro Date