The magnetic decoupling between the systems, the robustness of the Brazilian electrical system and the ONS' care for stability guarantee a very low chance of Brazil being impacted in case of new blackouts in neighboring countries, as occurred on June 16, when Argentina and Uruguay suffered a collapse and were without light for up to nine hours.

According to the ONS, "the interconnection with other countries through converters is a measure of physical protection capable of disconnecting such systems and avoiding the imbalance that creates a ripple effect in events of this nature".

In addition, the robustness of the Brazilian electrical system, together with the computational tools for dynamic simulation used by the ONS, ensure the operation of the SIN always in a reliable region, preventing possible fluctuations in neighboring countries from spreading across national territory, creating an effect domino.

During the blackout in Argentina and Uruguay, the Brazilian system was also stable. In addition to not having suffered any outages, it also sent energy to both countries to help them in the process of restoring supply.

According to the daily newsletter (IPDO), the exchange to Argentina, via the Garabi I and II converters, was null due to the automatic blocking. As for Uruguay, the exchange took place via the Rivera converter from 12:13 pm to 3:30 pm to serve Argentina. In addition, via the Uruguaiana converter, from 1:11 pm to 2:43 pm and from 3:22 pm to 5:15 pm to serve Uruguay.

For the international exchange, 417 average MW were programmed, but 281 average MW were carried out. For Garabi I 57 average MW were exported, for Garabi II 212 average MW, 10 average MW for Rivera and another 2 average MW for Uruguaiana.

The main electrical interconnection point between Brazil and its neighboring countries is precisely at the Garabi converter next to Argentina, with a capacity of about 2 GW, through which the import and export of energy from that country is carried out. This would perhaps be the only point capable of bringing some imbalance to the national electricity sector, however, it would be necessary to combine several simultaneous factors and it is precisely on these conditions that the ONS acts preventively to ensure the stability of the SIN.