Title:
FLASH LAMP LIGHT EMITTING CIRCUIT
Document Type and Number:
Japanese Patent JPH05180894
Kind Code:
A
Abstract:
PURPOSE: To provide a flash lamp light emitting circuit which can be applied to 154KV power transmission line having a large short-circuit current value.
CONSTITUTION: A programmable unijunction transistor Q3 is connected to a light emitting circuit formed by connecting a rectifying circuit 3, a capacitor C2 for light emission, a thyristor Q2 for light emitting operation and a flash lamp 4 to a current transformer CT for detecting earth current through a surge absorbing circuit 2. The voltage at the time of operation is applied to the gate of a thyristor Q4 connected to the d.c. side of the rectifying circuit 3 to short- circuit the d.c. side of the rectifying circuit 3 by the thyristor Q4.
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Inventors:
NAKAJIMA YASUHIRO
KONDO NORIO
MORIKAWA SATOSHI
NISHIKAWA TAKASHI
KONDO NORIO
MORIKAWA SATOSHI
NISHIKAWA TAKASHI
Application Number:
JP13192A
Publication Date:
July 23, 1993
Filing Date:
January 06, 1992
Export Citation:
Assignee:
NGK INSULATORS LTD
International Classes:
G01R31/08; H02H3/16; H02H7/26; (IPC1-7): G01R31/08; H02H3/16; H02H7/26
Attorney, Agent or Firm:
Akio Najima (2 others)