The effects of earth potential rise on surge arrester specification in specially bonded cable systems

Surge arrester specification is of vital importance for the protection of any underground cable system. This paper outlines additional considerations for arrester specification in specially bonded cable systems. In particular, the paper addresses the effect of earth potential rise on arresters in mid point bonded extensions to fully crossbonded cable sections, under a single line to ground fault conditions. A steady state model has been developed to determine the standing steady state voltages impressed on the arreseters in the mid point bonded section. The model has been compared with simulations in EMTP-RV and verified using field tests.