🌐EnglishEnglishDeutschItaliano한국어中文日本語EntityQ1747997· pop 5· linked from 277 articlesancillary servicesservices necessary to support the transmission of electric power to maintain reliable operations of the interconnected transmission systemAvailable in 5 languagesDeutschItalianoCatalan한국어via Wikidata sitelinks · CC0ConnectionstransformerEntitypower stationEntityCategoriesElectric power transmission