KUALA LUMPUR, Sept. 26 -- The Transport Ministry has identified a circulating current within underground cables as the cause of the power outage at KLIA Terminal 2 on Aug 28.

A technical investigation by Malaysia Airports Holdings Berhad (MAHB) found that the current formed between a 33-kilovolt (kV) main substation and several 11kV terminal substations.

This current created localised heating at cable termination points, which ultimately led to a flashover that cut off the electricity supply.

The ministry explained that the problem was exacerbated by high soil resistivity, which prevented the current from discharging effectively into the ground, thereby increasing heat pressure on the cable's sheath wires and contributing to the system...