Arteche Lantegi Elkartea, S.A. engages in the design, manufacture, integration, and supply of electrical equipment and solutions in Spain and internationally. It offers high voltage instrument transformers, power voltage transformers, protection of mixed overhead-underground lines, digital instrument transformers, IEEE/ANSI medium voltage instrument transformers, and medium voltage sensors; trip, supervision, and auxiliary relays, railway relays, secondary injection tests, and substation automation solutions; and power quality solutions for grid connected renewables, capacitor banks and harmonic trips, automatic circuit reclosers, and power grid services. The company also provides IEC medium voltage instrument transformers; and flywheels energy storage systems (FESS). Its products are used for measurement, protection, automation, control, and communication in the generation, transmission, and distribution sectors. The company was founded in 1946 and is headquartered in Mungia, Spain.