Patent ID: 7538541

Claim:
A Rogowski coil assembly, comprising: a first printed circuit board assembly comprising first and second circuit boards disposed in a stacked relationship with respect to each other, the first and second circuit boards together comprising a concave shape defined by a first end and a second end of the first printed circuit board assembly, the concave shape configured to define an opening to allow for passage of a conductor between the first end and the second end of the first printed circuit board assembly, the first circuit board having a first section of coil formed thereon, the first section of coil comprising first and second ends, the second circuit board having a second section of coil formed thereon, the second section of coil comprising a third end and a fourth end, the first and third ends and the second and fourth ends of the first and second sections of coil, respectively, being connected in series with one another to form a first larger continuous coil loop generating a first voltage output when placed around a conductor; and a second printed circuit board assembly separately provided from the first printed circuit board assembly, the second printed circuit board assembly comprising third and fourth circuit boards disposed in a stacked relationship with respect to each other, the third and fourth circuit boards together comprising a concave shape defined by a first end and a second end of the second printed circuit board assembly, the concave shape configured to define an opening to allow for passage of a conductor between the third end and the fourth end of the second printed circuit board assembly, the third circuit board having a third section of coil formed thereon, the third section of coil comprising first and second ends, the fourth circuit board having a fourth section of coil formed thereon, the fourth section of coil comprising a third end and a fourth end, the first and third ends and the second and fourth ends of the third and fourth sections of coil, respectively, being connected in series with one another to form a second larger continuous coil loop, generating a second voltage output when placed around the conductor, wherein the first larger continuous coil loop is not electrically coupled to the second larger continuous coil loop, and wherein a total voltage output of the coil assembly is the sum of the first voltage output and the second voltage output.