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High-leg delta (also known as wild-leg, stinger leg, bastard leg, high-leg, orange-leg, red-leg, dog-leg delta) is a type of electrical service connection for three-phase electric power installations. It is used when both single and three-phase power is desired to be supplied from a three phase transformer (or transformer bank).
This setup produces three different voltages: If the voltage between the center tap (neutral) and each of the top and bottom taps (phase and anti-phase) is 120 V (100%), the voltage across the phase and anti-phase lines is 240 V (200%), and the neutral to "high leg" voltage is ≈ 208 V (173%).
The first drawing shows the high-leg to be L3 on the transformer. The high-leg is normally the B-Phase; an odd explanation is given as to why L3 is winding up (pun) as the B Phase on the panel: "By convention, the high leg is usually set in the center (B phase) lug in the involved panel, regardless of the L1-L2-L3 designation at the transformer."
Delta-wye transformers are common in commercial, industrial, and high-density residential locations, to supply three-phase distribution systems. An example would be a distribution transformer with a delta primary, running on three 11 kV phases with no neutral or earth required, and a star (or wye) secondary providing a 3-phase supply at 415 V ...
For example, balanced two-phase power can be obtained from a three-phase network by using two specially constructed transformers, with taps at 50% and 86.6% of the primary voltage. This Scott T connection produces a true two-phase system with 90° time difference between the phases.
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These three moves are easy to do in a small space (even in a hotel room!) and will help keep you in shape while traveling. 3 simple exercises you can do while traveling Skip to main content
Ballistic training, also known as compensatory acceleration training, [1] [2] uses exercises which accelerate a force through the entire range of motion. [ 1 ] [ 3 ] It is a form of power training which can involve throwing weights, jumping with weights, or swinging weights in order to increase explosive power. [ 4 ]