Transformers have been used at power plants since the inception of alternating-current generation, a century ago. While operating principles of transformers remain the same, the challenges of maintaining and testing transformers have evolved along with transformer design and construction. This book is about the basics, maintenance and diagnostics of transformers.

Mining historian Kerby Jackson introduces us to a classic mining work in this important re-issue of the Department of Interior publication ""Geology and Ore Deposits of the Butte Mining District of Montana." This important publication on Montana Mining has not been available for over a century. Included are rare insights into the gold, copper and silver mines of Butte, Montana together with hard to find maps and photographs. Some of the topics include the early history of gold, silver and copper mining in the Butte area, insight into the geology of its mining areas, the local distribution of...

Mining historian Kerby Jackson introduces us to a classic mining work in this important re-issue of the Department of Interior publication "Geology and Ore Deposits of the Philipsburg Quadrangle of Montana." This important publication on Montana Mining has not been available for over a century. Included are rare insights into the gold, copper and silver mines of the vicinity of this important mining area of Montana. Some of the topics include the early history of gold, silver and copper mining in the Philipsburg Quadrangle, insight into the geology of its mining areas, the local distribution...

Mining historian Kerby Jackson introduces us to a classic mining work in this important re-issue of the Department of Interior publication "Geology and Ore Deposits of the North Western Part of the Garnet Range of Montana." This important publication on Montana Mining has not been available for over a century. Included are rare insights into the gold, copper and silver mines of the vicinity of this important mining area of Montana. Some of the topics include the early history of gold, silver and copper mining in the Garnet Mountains, insight into the geology of its mining areas, the local...