Title:
逆接防止回路
Document Type and Number:
Japanese Patent JP3597147
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve such a problem that, with respect to equipment which adopts redundant configuration, or two systems, for example 0-system and 1-system for primary power input, if one system is connected normal and the other system is connected in reversely of the systems using a use as reverse connection pro tecting means, the fuse is blown and cost for repair is required. SOLUTION: Primary power supply to a load 143 is configured redundantly and obtained from a 0-system primary power input terminal 102 and a 1-system primary power input terminal 122. If a 1-system primary power supply 121 to be connected to the 1-system primary power input terminal 122 is reversely connected and negative pole from the 1-system primary power supply 121 is connected to a 1-system positive line 124, the direction of the current is detected at a current detecting portion 128. At anomaly time, therefore, a cut off signal 129 is outputted to break (open) relay in an current cut off portion 130, and protection is thereby provided against reverse connection to the load 143 and a 0-system positive line 104.
Inventors:
Keisei Sakai
Application Number:
JP2001178785A
Publication Date:
December 02, 2004
Filing Date:
June 13, 2001
Export Citation:
Assignee:
Saitama NEC Corporation
International Classes:
H02H11/00; H02J1/00; H04B7/26; (IPC1-7): H02H11/00; H02J1/00
Domestic Patent References:
| JP6348350A | ||||
| JP4026326A | ||||
| JP11187572A | ||||
| JP8009552A | ||||
| JP7154921A | ||||
| JP2000333366A | ||||
| JP2000138023A |
Attorney, Agent or Firm:
Masahiko Desk
Yasuhisa Tanizawa
Kawai Nobuaki
Yasuhisa Tanizawa
Kawai Nobuaki