Overview
McCully Substation is an operational electrical substation in Honolulu, Hawaii, owned and operated by Hawaiian Electric Company. It operates at voltages of 46 kV and 12.47 kV, serving the local grid.
McCully Substation is an operational electrical substation located in Honolulu, Hawaii, United States. Owned and operated by Hawaiian Electric Company, this facility plays a key role in the state's electrical infrastructure, stepping down transmission voltages for distribution to residential and commercial customers. The substation operates at two voltage levels: 46 kV for sub-transmission and 12.47 kV for primary distribution. As part of Hawaiian Electric's network, it adheres to North American Electric Reliability Corporation (NERC) reliability standards and is subject to regulation by the Hawaii Public Utilities Commission. The facility's urban location in Honolulu underscores its importance in maintaining grid stability for a densely populated area. McCully Substation supports the electrical needs of Honolulu, contributing to the reliability of power supply in Hawaii's largest city. Its role in voltage transformation and distribution is critical for local businesses, homes, and essential services. The substation's operational status ensures continued service to the community, aligning with Hawaiian Electric's commitment to grid resilience.
Environmental context
Located in urban Honolulu, McCully Substation operates in a densely populated area with high electricity demand. The substation's voltage levels (46 kV and 12.47 kV) indicate its role in distributing power from transmission lines to local networks. Urban substations like this are typically designed with compact layouts and may include noise mitigation measures. The facility's proximity to residential and commercial zones requires adherence to safety and environmental regulations to minimize electromagnetic field exposure and visual impact.
Frequently asked questions
McCully Substation is located in Honolulu, Hawaii, United States, at coordinates 21.290571, -157.833455.
McCully Substation operates at two voltage levels: 46 kV for sub-transmission and 12.47 kV for primary distribution.
McCully Substation is owned and operated by Hawaiian Electric Company, the primary electric utility serving the island of Oahu.
As part of the US electrical grid, McCully Substation must comply with NERC reliability standards and is regulated by the Hawaii Public Utilities Commission.
Substations like McCully step down high transmission voltages to lower distribution voltages for safe delivery to homes and businesses, and they also provide switching and protection for the grid.