SEMI is a pioneer in the Spanish market in terms of high-voltage line projects and construction.
With more than 500 operators qualified in High-Voltage lines, we are one of the benchmark Spanish companies in this activity, in 132 kV, 220 kV and 400 kV. The specialised service provided by our team has managed to gain sustained satisfaction among our customers, allowing us to continue providing our service after almost one hundred years.
