Apparatus for detecting short-circuit for use in bi-polar...

Details Apparatus for detecting short-circuit for use in bi-polar... Apparatus for detecting short-circuit for use in bi-polar...

G - Physics

01

R

G01R 31/02 (2006.01) H02H 7/26 (2006.01) H02J 3/36 (2006.01)

Patent

CA 2069665

There is disclosed an apparatus for detecting a short-circuit of a bi-polar d.c. transmission system in which one end of a neutral line is ground and the other end thereof is not ground. This short-circuit detecting apparatus is adapted to detect a short-circuit between d.c. transmission lines on conditions that a current flowing in the neutral line is below a predetermined value, that a ground current at the ground point of the neutral line is below a predetermined value, and that a difference between bi-polar current command values is above a predetermined value.

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