Hasumiyar watsawa (kuma pylon wutar lantarki, hasumiya ta ruwa a Kanada, da pylon a Biritaniya) tsari ne mai tsayi, yawanci hasumiya ce da aka yi da karfe wanda ake amfani da shi don tallafawa layin wutar lantarki. A cikin grid ɗin lantarki, hasumiya na watsawa suna ɗaukar manyan layukan watsa wutar lantarki waɗanda ke jigilar wutar lantarki mai yawa daga tashoshin samar da wutar lantarki, daga inda ake isar da wutar lantarki don ƙare masu amfani; haka kuma, ana amfani da sandunan amfani don tallafawa ƙananan ƙananan wutar lantarki da layin rarrabawa waɗanda ke jigilar wutar lantarki daga tashoshin zuwa abokan cinikin wutar lantarki.

Akwai nau'o'i hudu na hasumiya na watsawa: (i) hasumiya ta dakatarwa, (ii) hasumiya mai mutuƙar ƙarewa, (iii) hasumiya mai ƙarfi, da (iv) hasumiya mai jujjuyawa.[1] Tsawon tsayin hasumiya na watsawa yana daga 15 zuwa 55 m (49 zuwa 180 ft);[1] mafi tsayi shine hasumiya na watsawa na 380 m (1,247 ft) na tsawon 2,656 m (8,714 ft) na Jintang-Cezi saman Powerline Link , tsakanin tsibiran Jintang da Cezi a lardin Zhejiang na kasar Sin. Mafi tsayin tsawon mashigar ruwa shine Ameralik Span na mashigar wutar lantarki na Ameralik fjord, mai tsawon 5,376 m (17,638 ft). Ana buƙatar ƙarin hasumiya na watsawa don rage sauyin yanayi, don haka a cikin 2020s hasumiya na watsawa sun zama mahimmanci a siyasance.

Ana rarraba hasumiya na layin watsawa bisa ga siffa, gami da nau'in gilashi, nau'in shugaban cat, nau'in babba, nau'in bushewa da nau'in guga. Dangane da ayyukansa, akwai hasumiyai na layin watsa tashin hankali, hasumiya na layin watsa layin dakatarwa, hasumiya ta layin watsa layin kusurwa, hasumiya na layin watsa layin tasha (matattu ƙarshen hasumiya), hasumiya na tsallake kogi, da sauransu.