Current sensor of zero flux type and measurement device

A current sensor of a zero flux type, comprising:

• a magnetic core configured to surround a measurement object through which a measurement current flows;
• a magnetic detection element incorporated in the magnetic core and configured to detect a magnetic flux generated in the magnetic core;
• a feedback circuit configured to output, based on a signal input from the magnetic detection element, a negative feedback current for canceling out the magnetic flux generated in the magnetic core by the measurement current;
• a winding wound around the magnetic core and configured to receive the negative feedback current from one end of the winding, detect a magnetic flux flowing through the magnetic core, and output from the other end of the winding a detection current indicating the measurement current;
• a plurality of connection circuits configured to block components from a direct current to a low frequency band;
• and
• a plurality of resistors connected in series, each resistor corresponding to one of a plurality of winding sections connected in series that constitute the winding, wherein
• one end of the plurality of resistors connected in series is connected to the other end of the winding, and
• one of the connection circuits is connected between an output end of the feedback circuit and the other end of the plurality of resistors connected in series, and each of the other connection circuits is connected between a connection point of adjacent resistors among the plurality of resistors and a connection point of adjacent winding sections that are corresponding to the adjacent resistors respectively among the plurality of winding sections.