It’s employed when a three phase transformer needs to supply both single and three-phase power (or transformer bank). The high-leg delta (also known as the wild-leg, stinger leg, bastard leg, high-leg, orange-leg, red-leg, and dog-leg delta) is a three-phase electrical service connection. This permits a single transformer to supply 120V single phase for single-phase loads and 240V three-phase for three-phase loads. The center of any one of the phases is center-tapped and grounded if the secondary of this transformer is delta. This transformation takes place within a transformer. It must be stepped down to 120V or 230V single phase to provide domestic and residential applications.
High-voltage power is transferred over vast distances.
