( ( At ( a substation ) ) ( , ( ( this ( medium-voltage ( electrical current ) ) ) ( ( is ( ( ( increased ( in voltage ) ) ( with ( ( a transformer ) ( for connection ) ) ) ) ( to ( the ( ( high voltage ) ( electric ( power ( transmission system ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (DT a) (NN substation))) (, ,) (NP (DT this) (JJ medium-voltage) (JJ electrical) (NN current)) (VP (VBZ is) (VP (VBN increased) (PP (IN in) (NP (NN voltage))) (PP (IN with) (NP (NP (DT a) (NN transformer)) (PP (IN for) (NP (NN connection))))) (PP (TO to) (NP (DT the) (ADJP (JJ high) (JJ voltage)) (JJ electric) (NN power) (NN transmission) (NN system))))) (. .)))
At a substation, this medium-voltage electrical current is increased in voltage with a transformer for connection to the high voltage electric power transmission system.
(ROOT (S (NP (NP (NNP Power)) (PP (IN in) (NP (NN electricity)))) (VP (VBZ is) (NP (NP (DT the) (NN voltage)) (VP (VBN multiplied) (PP (IN by) (NP (DT the) (JJ current)))))) (. .)))