Rope CT Positioning Guide

Rope CTs should be installed properly to reduce the maximum error based on positioning. Ideally the conductor being monitored will be perpendicular to the rope CT loop, and pass through the center of the rope CT as shown below. Tie-wraps or other non-conductive fasteners can be used to center the rope CT around the conductor.

 

rope-positions.png

Position Number Position Description Error
1 Centered < 0.4%
2, 3, 4 Near outer edge < 2.0%
5 Near connector < 4.0%

 

 

position-good.jpg

Conductor through center of rope CT (ideal placement)

position-touching-edges.jpg

Conductor touching points 4 and 2 (less than ideal placement)