Inside the generator is a magnetic field which produces voltage—or electricity at approximately 15,000 volts (V). . The voltage coming to the substation, at 115,000 or 46,000 volts, is too high to go directly into your neighborhoods. Distribution Transformer We're not ready to get the power to your house. . Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Substation also dispatches electric power from generating stations to the consumption center. Ontario's transmission lines — the large towers we. .