▁a ▁rot or ▁lock ▁system ▁as ▁primary ▁means . ▁Such ▁bra kes ▁are ▁usually ▁applied ▁only ▁after ▁bla de ▁fur ling ▁and ▁elect romagnet ic ▁bra king ▁have ▁reduced ▁the ▁tur bine ▁speed ▁as ▁the ▁mechanical ▁bra kes ▁can ▁create ▁a ▁fire ▁inside ▁the ▁nac elle ▁if ▁used ▁to ▁stop ▁the ▁tur bine ▁from ▁full ▁speed . ▁The ▁load ▁on ▁the ▁tur bine ▁increases ▁if ▁the ▁bra ke ▁is ▁applied ▁at ▁r ated ▁R PM . ▁ ▁Tur bine ▁size ▁▁ ▁There ▁are ▁different ▁size ▁classes ▁of ▁wind ▁tur b ines . ▁The ▁smallest ▁having ▁power ▁production ▁less ▁than ▁ 1 0   k W ▁are ▁used ▁in ▁homes , ▁far ms ▁and ▁remote ▁applications ▁whereas ▁intermediate ▁wind ▁tur b ines ▁( 1 0 - 2 5 0   k W ▁) ▁are ▁useful ▁for ▁village ▁power , ▁hy brid ▁systems ▁and ▁distributed ▁power . ▁ ▁The ▁world ' s ▁largest ▁wind ▁tur bine , ▁an ▁ 8 - MW ▁tur bine ▁located ▁at ▁the ▁Bur bo ▁Bank ▁Ext ension ▁wind ▁farm ▁in ▁Liverpool ▁Bay , ▁United ▁Kingdom , ▁was ▁installed ▁in ▁ 2 0 1 6 . ▁Util ity - scale ▁tur b ines ▁( lar ger ▁than ▁one ▁meg aw att ) ▁are ▁used ▁in ▁central ▁station ▁wind ▁far ms , ▁distributed ▁power ▁and ▁community ▁wind . ▁ ▁For ▁a ▁given ▁surv iv able ▁wind ▁speed , ▁the ▁mass ▁of ▁a ▁tur bine ▁is ▁approximately ▁proportional ▁to ▁the ▁cube ▁of ▁its ▁bla de - length . ▁Wind ▁power ▁intercept ed ▁by