How Do They Do It? How Do They Do It? How Do They Do It? is a television series produced by Wag TV for Discovery Channel. Each programme explores how 2 or 3 ordinary objects are made and used. The show's slogan is "Behind the ordinary is the extraordinary." The series is broadcast throughout the world on various Discovery-owned networks including: Series 1 and 2, which were co-produced with Rocket Surgery Productions, were narrated by Rupert Degas; series 3 and 4 were narrated by Iain Lee; and series 5 and 6 were narrated by Dominic Frisby. In 2008, the UK's Channel 5 began airing the
Symmetrical components zero sequence currents. For this reason, most transmission, and much sub-transmission is implemented using delta. Much distribution is also implemented using delta, although "old work" distribution systems have occasionally been "wyed-up" (converted from delta to wye) so as to increase the line's capacity at a low converted cost, but at the expense of a higher central station protective relay cost. Symmetrical components In electrical engineering, the method of symmetrical components simplifies analysis of unbalanced three-phase power systems under both normal and abnormal conditions. The basic idea is that an asymmetrical set of "N" phasors can be expressed as a linear