Analysis Of Insulator Investment Ratio In Power Transmission And Distribution Projects

In the total investment of a typical power transmission and distribution project, polymer deadend insulator accounts for a very small proportion. For overhead line or substation projects, the cost of porcelain dead end insulators is only about 5% to 10% of the total capital expenditure.

Most of the funds are concentrated in key areas such as structural support, tower foundations, conductor materials, civil construction, and the transformer equipment itself. In contrast, functional components like component suspension insulator have a negligible share in the total cost structure.

Despite their low percentage and large quantity, the cost of these components has almost no significant impact on the overall project cost from the project budget and procurement stages to the construction bidding stage. In project financial statements, these components are often classified as "auxiliary materials" or "line accessories," and their proportion is usually ignored in the overall budget.