What caused the transformer fire at Mid Valley Megamall?

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The TX2 transformer fire at Mid Valley Megamall's main entrance substation was caused by the transformer itself catching fire.

An initial investigation by the Energy Commission (ST) determined that the fire originated from a TX2 transformer within the substation room. This incident led to a complete disruption of the electricity supply system that relied on that particular substation. The proximity of the cable system to the fire also resulted in it being affected.
Origin of the Fire

The fire at the Mid Valley Megamall electrical substation commenced around 10:30 AM on a Wednesday. The TX2 transformer, located in the main entrance substation room, was identified as the source of the ignition. This transformer catching fire directly impacted the entire electricity supply network dependent on the substation.
Widespread Power Disruption

The fire's intensity and location within the substation caused all four transformers to lose their power supply. This resulted in a significant power outage affecting the mall. The affected cable system, situated close to the fire, also sustained damage, further contributing to the disruption.
Restoration and Ongoing Investigation

Electricity supply was eventually restored in stages by approximately 12:30 PM on the same day of the incident. The Energy Commission is continuing its investigation to pinpoint the definitive cause of the transformer fire. ST has stated it views such incidents seriously due to their impact on electricity supply stability and public safety.
Potential Actions and Mitigation Plans

Should the investigation uncover any negligence or fault on the part of any party, the Energy Commission indicated that appropriate actions would be taken under the Electricity Supply Act 1990 and the Electricity Regulations 1994. Concurrently, Tenaga Nasional Bhd (TNB) is developing a mitigation plan which includes the installation of new cables to re-establish and ensure the quality of power supply to consumers.

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What caused the transformer fire at Mid Valley Megamall?

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