Title:
SAFETY DEVICE FOR RELAY CONTACT
Document Type and Number:
Japanese Patent JPH11297176
Kind Code:
A
Abstract:
To ensure weld prevention in a relatively simple structure.
A current value detecting means 2 for detecting a contact current in a relay 1 and a controller 3 for locking the opening operation of a relay contact when a current detected by the current value detecting means 2 flows over a preset reference value and for starting opening operation of the relay contact when the current value detected by the current value detecting means 2 is not more than the reference value are included.
Inventors:
TOTSUKA SHIGERU
Application Number:
JP10313598A
Publication Date:
October 29, 1999
Filing Date:
April 14, 1998
Export Citation:
Assignee:
NIPPON ELECTRIC IND
International Classes:
H01H47/00; (IPC1-7): H01H47/00
Attorney, Agent or Firm:
Takeo Masuda