Transmission structure replacement work in Oahu, Hawaii
Transmission structure replacement work in Oahu, Hawaii.

Transmission Construction Challenges in Paradise

Hawaiian Electric is addressing aging infrastructure and has begun replacing existing transmission structures.

Hawaiian Electric Co. has nearly 1300 structures on its 28 138-kV transmission circuits that span the island of Oahu. The system is isolated with no interconnections to other utilities. A single structure failure should not cause customer outages, but the system is at an increased risk for overload and outages if additional failures occur. The 138-kV transmission structures generally are one of the following types: wood poles, steel poles, fiberglass poles, aluminum frames, and steel or

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