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Title:
ZERO-PHASE CURRENT TRANSFORMER USING HOLE ELEMENT
Document Type and Number:
Japanese Patent JPS5578514
Kind Code:
A
Abstract:

PURPOSE: To improve detection sensitivity, quicken response and thus to improve performance of a leakage breaker by detecting change in magnetic flux through inserting a hole element in the magnetic path of a zero-phase current transformer.

CONSTITUTION: A hole element 2 is inserted in the magnetic path of a magnetic core 1, and voltage is impressed by a DC power 23. Where difference occurs between currents flowing in reciprocating conductors L1, L2, a magnetic flux is produced according to the difference current and a hole voltage arises on the hole element 2, thus actuating a detection circuit 5.


Inventors:
KOBAYASHI KENICHI
KATOU SHINYA
Application Number:
JP1978000151993
Publication Date:
June 13, 1980
Filing Date:
December 11, 1978
Export Citation:
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Assignee:
FUJITSU LTD
International Classes:
H02H3/33; H01F38/20; (IPC1-7): H01F40/06; H02H3/33



 
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