Overview
McNabb Substation is an operational electrical substation in Arkansas, United States, owned and operated by Entergy Arkansas. It operates at a voltage of 115 kV, serving the regional grid.
McNabb Substation is an electrical substation located in Arkansas, United States, owned and operated by Entergy Arkansas. The facility is operational and plays a role in the regional transmission network, stepping down high-voltage electricity for distribution. With a voltage level of 115 kV, it is classified as a sub-transmission or distribution substation, typical for serving local communities and industrial areas. The substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC), which set reliability standards for the bulk power system. As part of the Entergy Arkansas grid, it adheres to NERC's Critical Infrastructure Protection (CIP) standards and FERC's regulations for transmission assets. The 115 kV voltage level is common for regional distribution, connecting higher-voltage transmission lines to lower-voltage distribution networks. McNabb Substation contributes to the electrical infrastructure of Arkansas by supporting grid stability and reliability for the surrounding area. Its location in the southwestern part of the state places it within a region that experiences hot summers and occasional severe weather, making grid resilience important. The substation's role in the Entergy system helps ensure consistent power supply to residential, commercial, and industrial customers.
Environmental context
The substation is located in a rural area of southwestern Arkansas, characterized by a mix of agricultural land and forest. The local climate includes hot, humid summers and mild winters, with occasional thunderstorms and tornadoes. Electrical infrastructure in such areas must be designed to withstand extreme weather events, including high winds and lightning strikes. The substation's equipment, such as transformers and switchgear, is typically enclosed or shielded to minimize environmental impact and ensure safety.
Frequently asked questions
McNabb Substation is located in Arkansas, United States, at coordinates 33.656822, -93.777589. It is owned and operated by Entergy Arkansas.
McNabb Substation operates at a voltage of 115 kV, which is typical for sub-transmission and distribution substations in the United States.
McNabb Substation is operated by Entergy Arkansas, a subsidiary of Entergy Corporation, which provides electricity to customers in Arkansas.
As part of the U.S. bulk power system, McNabb Substation must comply with NERC reliability standards and FERC regulations, including requirements for grid stability, cybersecurity, and equipment maintenance.
A 115 kV substation typically steps down high-voltage transmission power (e.g., 230 kV or higher) to lower voltages for distribution to local areas. It also provides switching and protection functions to maintain grid reliability.