Sistema Interconectado del Norte Grande
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- "SING" redirects here. If you are looking for "sing", the act of singing, or a number of other topics, please see sing.
The Sistema Interconectado del Norte Grande (Spanish for Interconnected System of Norte Grande) or SING is a alternating current power grid serving the Norte Grande zone of Chile, it produces 19% of the national power generation. The SING covers the three northernmost regions of Chile including Arica y Parinacota, Tarapacá and Antofagasta Region.