Title:
負荷回路の保護装置
Document Type and Number:
Japanese Patent JP5377362
Kind Code:
B2
Abstract:
A protection device protecting a load circuit by shutting off a power thereof depending on an estimated present temperature of a wire provided in the load circuit to connect a load. The protection device has a first temperature estimation device estimating a rising temperature of a conductor including the wire based on both a current in the conductor and thermal properties of the conductor, a second temperature estimation device estimating a falling temperature of the conductor based on the thermal properties, a third temperature estimation device estimating an arc-induced rising temperature of the conductor when arcing occurs in the conductor, and a fourth temperature estimation device estimating the present temperature of the conductor deduced from the above estimated temperatures. If the estimated temperature exceeds a predetermined allowable temperature, the protection device shut off the power of the load circuit.
Inventors:
Yoshihide Nakamura
Akiyoshi Kanazawa
Akiyoshi Kanazawa
Application Number:
JP2010042802A
Publication Date:
December 25, 2013
Filing Date:
February 26, 2010
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
H02H6/00; G01R19/165; H02H5/04
Domestic Patent References:
| JP2002084654A | ||||
| JP8242533A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu