PCB Rogowski coil overcomes the drawbacks such as poor repeatability and low accuracy of traditional handmade Rogowski coils

and is propitious to extensive automatic production.But PCB Rogowski coil is formed by interconnections of the conductive imprints on the upper and lower sides of single PCB with plated through holes as well as connections of mirrored PCB pairs in series with soldering points.This special design causes reliability of coil depending on the quality of PTH and soldering point.Thus

this paper presents the failure modes and failure mechanism of PTH

establishes the reliability model of PCB Rogowski Coil

deduces relational formula of the failure rate

lifetime to the number of PTH and the pairs of mirrored PCB

finally

it predicts the failure rate and lifetime of PCB Rogowski Coils for 300 A current measurement.