Title:
【発明の名称】直流しゃ断装置
Document Type and Number:
Japanese Patent JP2560155
Kind Code:
B2
Abstract:
A superconducting coil protective system comprising a protective resistor connected in parallel to a superconducting coil for dissipating the energy stored on the superconducting coil and a normally-closed power switch for interrupting an electric current flowing from the power source to the superconducting coil in response to a quenching signal from the quenching detector. A fuse circuit, which includes a serially-connected fuse and a closure switch, is connected in parallel to the power switch. The protective system may comprise a current interrupting circuit connected in parallel to the superconducting coil and the protective resistor and a commutation switch connected in series with the protective resistor and the current interrupting circuit for allowing a commutation of a current from the superconducting coil to the current interrupting circuit in response to the quenching signal. In this case, the fuse circuit is connected in parallel to the protective resistor.
Inventors:
YAMAGUCHI SAKUTARO
Application Number:
JP9189491A
Publication Date:
December 04, 1996
Filing Date:
April 23, 1991
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H01H33/59; H01H85/46; H02H7/00; H02J15/00; (IPC1-7): H01H33/59; H01H85/46
Attorney, Agent or Firm:
Kaneo Miyata (3 outside)