Compensating apparatus for a non-contact current sensor installing variation in two wire power cable

A compensating apparatus for installing variation of a non-contact current sensor on a two-wire power cable, comprising:

• a non-contact current sensor, having a first current sensor, a second current sensor, and a third current sensor, the non-contact current sensor being mounted at a top position of a two-wire power cable, a horizontal direction being defined as a direction collinear with a connection line of two centers of corresponding two wires of the two-wire power cable, a vertical direction being defined as a direction perpendicular to the horizontal direction;
• a sensing element characteristic measuring unit for constructing a space characteristic measuring database for the non-contact current sensor respective to the two-wire power cable;
• and
• a non-contact current measurement module for pairing the space characteristic measuring database so as to compute and further output a measured value of the current I in the two-wire power cable.