Electric Power

A: Running with the wrong governing document can leave the safety function non-compliant on paper, even if the hardware never changes, exposing the asset owner after an incident. The contractual reference fixes the applicable standard unless there's a managed change; extending the proof-test interval already triggers MOC and a SIL re-check under that same edition.

A: Repeated trips at energisation stress breakers and delay restoration, but misdiagnosing it leads to pointless insulation work. Residual flux drives high magnetising inrush even with healthy insulation, matching clean DGA and cold IR results.

A: Energising with a missed ground risks severe arc flash and equipment damage within seconds. Grounds can be reinstalled during testing, so final visual and continuity checks right before closing avoid a lethal oversight.

A: Inadequate surge protection can puncture transformer insulation without visible external damage. Station-class arresters at the interface control steep-front surges before they reach the windings, matching the voltage class and exposure.