Transformers –Understanding Delta/Delta - YouTube Click to view on Bing26:36Transformers –Understanding Delta/Delta Connections, Corner Test Point for a Wye-Delta Transformer Bank - Duration: Paralleling a Wye-Delta Transformer Bank - Duration:Author: MikeHoltNECViews: 102K Installations and Inspections of Corner-grounded Systems The uncommon grounded system is a 3-phase, 3-wire corner-grounded delta system. This is a system where one of the phase conductors of the 3-phase delta bank is intentionally grounded. Corner-grounded systems were used to supply services serving only a 3-phase load such as a well pump. High-leg delta - Wikipedia OverviewSupplyExplanationAdvantagesDisadvantagesApplicationsHigh-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. The three-phase power is connected in the delta configuration, and the center point of one phase is grounded. This creates both a split-phase single phase supply and three-phase. It is called "orange leg" because the wire is color-coded orange. By convention, the high leg is usually setSee more on enpedia · Text under CC-BY-SA license Corner-Grounded Delta Circuits – Continental Control Occasionally, (especially in older facilities or in oil well and irrigation applications), you may encounter a three-phase delta service with one phase (leg) connected to ground, called a “corner grounded delta” or “grounded leg service”. Corner Grounded Delta - Electrical Engineering general The requirements you reference are used to prohibit ungrounded 208Y systems. It could also prohibit a corner grounded 240V delta since using a grounding transformer a 240V system could be grounded with a L-G voltage of only 139V. There is no way of grounding a 480V system (or any over 260V L-L) to meet the 150V L-G standard.
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