Induced AC interference is a concern from both the pipeline integrity and safety standpoint. Research and testing are typically needed to ascertain exactly how AC voltage affects cathodically protected structures.

Operating personnel can be exposed to electrical shock whenever the induced AC exceeds either the “touch” potential (potential difference between hand and foot) or the “step” potential (potential difference between both feet while walking or standing).

It is possible to predict the levels of induced AC based upon knowledge of several variables using various mathematical models and direct measurement using coupons at identified critical areas.

Ancor perform a methodology to ascertain critical areas with the highest values of induced AC which will be used for further monitoring to obtain the required data for designing and implementing an adequate mitigation system.

Once the voltage levels are approximated, mitigation measures to reduce the AC potentials to acceptable levels can be designed and implemented. We recommend, location of the mitigation system, as well as the type and size of grounding required.

STANDARD REPORT INFORMATION