A fire at the North Hyde substation on March 20 caused a power outage at Heathrow Airport, most likely due to moisture entering an electrical bushing. This incident led to the airport's closure the following day, affecting around 270,000 journeys and resulting in over 66,919 domestic and commercial customers losing power. The National Energy System Operator conducted an investigation and concluded that the short circuit from moisture ignited oil, causing the fire that disrupted airport operations and passenger travel significantly.
A fire at the North Hyde substation on 20 March was most likely caused by moisture entering an electrical component, leading to a significant power outage at Heathrow Airport.
The fire resulted in the closure of Heathrow Airport and led to thousands of cancelled flights as approximately 270,000 journeys were affected.
The electricity caused by moisture-induced short-circuiting likely arced, igniting oil and starting the fire, impacting 66,919 domestic and commercial customers.
The National Energy System Operator was ordered to investigate the fire's cause, with findings indicating a mechanical defect contributed to the incident.
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