Patent ID: 7458279

Claim:
Clamp-on measurement device, for attachment to a support, comprising: at least one instrument transformer, a retaining means for holding the instrument transformer, and fastening means for attachment of the retaining means to the support, wherein the retaining means is attachable to the fastening means in a manner enabling the retaining means to be movable in at least one predetermined direction toward and away from the support and to pivot about a pivot axis, wherein the attachment of the retaining means to the fastening means enables an instrument transformer held in the retaining means to be both move away from the support pivoted around the pivot axis in a manner exposing a side of the instrument transformer which had faced the support beforehand, and wherein the attachment comprises a groove on one of the retaining means and the fastening means which runs in the predetermined direction and a projection on the other of the fastening means and the retaining means which engages the groove to ensure movement of the retaining means toward and away from the support and the pivoting motion of the retaining means around the pivoting axis.