Low voltage secondary services from this transformer connection are: • 2 - wire 120V • 3 - wire 120/240V • 3 - wire 240/480V In most cases, a 240/480 transformer will have two high side bushings. In each of these service types, the X2 terminal is connected to the transformer tank ground, system neutral, and earth ground. For a 2-wire 120V service, the service neutral is connected to X2 with the energized conductor being connected to either X1 or X3. For 3 – wire services, the service neutral is connected to X2 with one energized service conductor being connected to X1 and the other to X3. kVA Rating The kVA ratings for this transformer is simply equal to the total 1-phase load the transformer is intended to support.
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