Subestación CEMEX (Interior) - 38 kV Substation in Puerto Rico, United States

Subestación CEMEX (Interior) is a substation located in Puerto Rico, United States, owned and operated by the Puerto Rico Electric Power Authority (PREPA). The facility operates at a voltage of 38 kV, classifying it as a medium-voltage substation within the island's electrical infrastructure. As part of PREPA's network, it plays a role in distributing electricity to industrial and residential areas. The substation operates under the regulatory framework of the United States, where the Federal Energy Regulatory Commission (FERC) oversees interstate electricity transmission, while local grid reliability is governed by the North American Electric Reliability Corporation (NERC) standards. In Puerto Rico, PREPA is the primary utility responsible for generation, transmission, and distribution, and the substation adheres to these reliability and operational standards. The facility's location in Puerto Rico places it within a region that has faced significant grid challenges, including hurricane-related outages and infrastructure aging. As a substation, it is critical for maintaining voltage stability and ensuring reliable power supply to connected loads. Its operational status contributes to the resilience of the local electrical network.

The substation is located in Puerto Rico, a tropical island with a warm climate and high humidity, which can affect electrical equipment longevity. The facility's voltage level of 38 kV indicates it serves a mix of industrial and residential customers. Substations in Puerto Rico often face environmental stressors such as salt spray in coastal areas and vegetation encroachment, requiring regular maintenance to ensure grid reliability.