Most repairs to fix a transformer will take between one and several hours. Extensive damage from storms or natural disasters can take up to several days. When a blown transformer causes a power outage, the first question everyone wants an answer to is how long it will take before electricity is back up and running

When a transformer blows, it interrupts electrical service to any residences or businesses connected to the transformer. Electric service crews must replace the destroyed hardware, first shutting down the incoming electrical line to prevent damage and injury.