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Chile's northern SING grid experienced a 2.1GW power supply interruption on Wednesday, with outages affecting approximately 90% of demand.
Grid operator CDEC-SING said in a statement that it immediately implemented a service recovery protocol established for large-scale outages.
Mining companies and other industrial consumers account for approximately 90% of demand on the grid, while the rest goes to distributors who supply about 6.1% of the national population.
Local daily La Nación reported that outages affected nearly every city in regions Arica (XV), Tarapacá (I) and Antofagasta (II).
The interruption occurred a day after Chile's executive branch introduced a bill to the lower house mandating an expanded energy ministry presence in every region.