CROSS THROUGH CURRENT TRANSFORMER, TERMINAL BLOCK, AND PROTECTIVE RELAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a cross through current transformer, a terminal block, and a protective relay device which are capable of furthermore reducing the number of installed current transformers and short-circuit protection relays for protecting a three-phase alternating circuit from short-circuit faults.

SOLUTION: A cross through current transformer 10 includes first and second primary conductors 121and 122and a toroidal core 16 having a secondary coil 14 wound therearound, wherein the first primary conductor 121pierces the toroidal core 16 in a direction from a first aperture surface of the toroidal core 16 to a second aperture surface of the toroidal core 16, and the second primary conductor 122pierces the toroidal core 16 in a direction from the second aperture surface of the toroidal core 16 to the first aperture surface of the toroidal core 16.

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