Meanings (ES + gloss)
voltio
In the International System of Units, the derived unit of electrical potential and electromotive force (voltage); the potential difference across a conductor when a current of one ampere uses one watt of power. Symbol: V
If the volt, ampere and ohm were taken as the absolute units, the practical units would be the ampere, begohm and begavolt, names just as convenient as ampere, coulomb and farad.
The system voltage is 630 volts d.c. and the supply to the trains is by top-contact third rail with running rail return.
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