Transient Voltages on Bonded Cable Sheaths

Field experience and tests show that unexpectedly high transient sheath voltage occur during the switching of charging current in single-conductor cable-type bus leads and in underground single-conductor power transmission cables bonded to eliminate sheath losses. No sheath troubles from these voltages have been found. Theoretical analysis of these voltages is presented together with suggested methods for protection of equipment, when the latter is necessary.