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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).
The delta winding allows third-harmonic currents to circulate within the transformer, and prevents third-harmonic currents from flowing in the supply line. [2] Delta-wye transformers introduce a 30, 150, 210, or 330 degree phase shift. [3] Thus they cannot be paralleled with wye-wye (or delta-delta) transformers.
Deltathree was founded in 1996 by Dmitry Goroshevsky, Sophia Babkove, Damian Kudriavtsev [Wikidata], [3] Elie Wurtman and Jacob Ner David to develop an Internet-based international low cost calling service using VoIP technology, and a "PC to Phone" solution, using a technology developed by Israeli company VocalTec Communications. [4]
Surge Protection Device (SPD) for installation in a low-voltage distribution board. A surge protector (or spike suppressor, surge suppressor, surge diverter, [1] surge protection device (SPD), transient voltage suppressor (TVS) or transient voltage surge suppressor (TVSS)) is an appliance or device intended to protect electrical devices in alternating current (AC) circuits from voltage spikes ...
JD-1 Dyke Delta - a small version, with 1+2 seating and fixed landing gear, used to generate and verify delta-wing and tailless-configuration flight characteristics. First flight July 1962; destroyed June 1964. [4] JD-2 Dyke Delta - an updated and enlarged version, with 1+3 seating and retractable landing gear. Debuted at Experimental Aircraft ...
In a typical diverter switch, powerful springs are tensioned by a low power motor (motor drive unit, MDU), and then rapidly released to effect the tap changing operation. To reduce arcing at the contacts, the tap changer operates in a chamber filled with insulating transformer oil , or inside a vessel filled with pressurized SF 6 gas.
Its very low aspect ratio 4.5 m (14.8 ft) span delta wing has an area of 10 m 2 (110 sq ft). The single nose-mounted wheel retracts while the tail and wing tip wheels are fixed. The recommended engine is the 1.6 litre displacement 50 hp (37 kW) Subaru EA71 four-stroke flat-4 (boxer) automotive conversion powerplant. [2]
In 1945, Rockwell Manufacturing Company acquired Delta Machinery and renamed it the Delta Power Tool Division of Rockwell Manufacturing Company and continued to manufacture in Milwaukee. In 1966, Rockwell invented the world's first power miter saw. In 1981, Rockwell's power tool group was acquired by Pentair and re-branded Delta Machinery.
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