Electrical current detection system

A current detection system comprising:

• a first magnetic plate and a second magnetic plate that are arranged in parallel to each other with a predetermined distance in a height direction;
• a bus bar, through which current flows in a depth direction perpendicular to the height direction;
• and
• a magneto-electric conversion element that converts a component of a measurement object magnetic flux in a lateral direction, which is perpendicular to the height direction and the depth direction, to an electric signal, the measurement object magnetic flux being generated by the current flowing through the bus bar, wherein:
• when an external magnetic flux in the lateral direction passes through an accommodation space, which is provided between the first magnetic plate and the second magnetic plate, a trajectory of the external magnetic flux is bent by the first magnetic plate and the second magnetic plate, and the accommodation space is divided into a permeable space, through which the external magnetic flux passes, and a non-permeable space, through which the external magnetic flux does not pass;
• the bus bar is arranged in the accommodation space;
• the magneto-electric conversion element is arranged in the non-permeable space;
• and
• the bus bar and the magneto-electric conversion element are arranged and lined in the height direction.