▁M Á V ▁to ▁ha ul ▁heavy ▁fre ight ▁and ▁passenger ▁trains ▁with ▁high ▁tract ive ▁effort . ▁This ▁is ▁the ▁most ▁powerful ▁type ▁of ▁locomot ive ▁that ▁have ▁been ▁made ▁in ▁Hung ary . ▁ ▁History ▁The ▁first ▁and ▁second ▁prototype ▁units ▁were ▁delivered ▁in ▁ 1 9 7 5 ▁( V 6 3 ▁ 0 0 1 , ▁V 6 3 ▁ 0 0 2 ). ▁Both ▁of ▁these ▁prototype ▁units ▁used ▁elect rical ▁equipment ▁from ▁Western ▁Europe ▁while ▁the ▁later ▁units ▁used ▁exclus ively ▁Hung arian ▁made ▁equipment . ▁The ▁null - series ▁( V 6 3 ▁ 0 0 3 , ▁V 6 3 ▁ 0 0 4 , ▁V 6 3 ▁ 0 0 5 , ▁V 6 3 ▁ 0 0 6 , ▁V 6 3 ▁ 0 0 7 ) ▁were ▁delivered ▁between ▁ 1 9 8 0 ▁and ▁ 1 9 8 1 . ▁From ▁ 1 9 8 4 ▁the ▁new ▁units ▁have ▁been ▁equ ipped ▁with ▁new ▁bog ies ▁with ▁better ▁running ▁performance ▁lic ensed ▁from ▁Kru pp . ▁In ▁total , ▁ 5 6 ▁units ▁have ▁been ▁delivered ▁to ▁M Á V . ▁Of ▁these , ▁ 5 1 ▁units ▁are ▁still ▁running . ▁ ▁In ▁ 1 9 9 2 ▁ 1 0 ▁units ▁got ▁a ▁modified ▁transmission ▁to ▁be ▁able ▁to ▁reach ▁a ▁speed ▁of ▁. ▁ ▁In ▁ 2 0 0 6 , ▁the ▁V 6 3 ▁ 0 4 8 , ▁V 6 3 ▁ 1 3 8