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Patent Searching and Data


Title:
CURRENT LIMITING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/128999
Kind Code:
A1
Abstract:
The present invention relates to a current limiting device for limiting the amount of overcurrent generated, for example, when an accidental short circuit occurs in a power system. The current limiting device comprises: a current limiting resistor (20) connected between fixed electrodes (4, 5); a plurality of openable contact members (11) provided adjacent to each other, forming a parallel circuit together with the current limiting resistor (20) when a steady-state current flows; a contact driver which opens the contact members (11) due to an overcurrent generated in the power system; opening members (12, 13) connected to the contact members (11) to substantially equalize the opening intervals of the plurality of contact members (11); and a plurality of springs (14 - 19) for biasing the opening members (12, 13). The spring force of each spring (14 - 19) is configured such that the further away from the contact driver, the larger the spring force.

Inventors:
HAYASHI KAZUFUMI (JP)
Application Number:
JP2013/073517
Publication Date:
August 28, 2014
Filing Date:
September 02, 2013
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02H9/02
Foreign References:
JP2010252620A2010-11-04
JP2009177922A2009-08-06
JP2008186823A2008-08-14
JP2010252620A2010-11-04
Other References:
See also references of EP 2991182A4
Attorney, Agent or Firm:
OIWA Masuo et al. (JP)
Masuo Oiwa (JP)
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