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Transformer Modelling Guide
Transformer Modelling Guide

... Standard Delta Phase-Shifting Transformer ........................................................................................ 197 Positive-Sequence Equivalent Circuit of Standard Delta Phase-Shifting Transformer ......................... 197 Negative-Sequence Equivalent Circuit of Standard Delt ...
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The Art and Science of Protective relaying

... connections,, 52 power, 52 short circuits, 56 characteristics on R-X diagram, 74 d-c types,, 49 use of shunts, 52 effect of mutual induction on ground relays, 393 electromagnetic-attraction type, 24 groundrelay polarization, 151, 326 misoperating tendencies, 314 negative-phase-aequence type, 330 ope ...
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Electric machine

The academic study of electric machines is the universal study of electric motors and electric generators. By the classic definition, electric machine is synonymous with electric motor or electric generator, all of which are electromechanical energy converters: converting electricity to mechanical power (i.e., electric motor) or mechanical power to electricity (i.e., electric generator). The movement involved in the mechanical power can be rotating or linear.Although transformers do not contain any moving parts they are also included in the family of electric machines because they utilise electromagnetic phenomena.Electric machines (i.e., electric motors) consume approximately 60% of all electricity produced. Electric machines (i.e., electric generators) produce virtually all electricity consumed. Electric machines have become so ubiquitous that they are virtually overlooked as an integral component of the entire electricity infrastructure. Developing ever more efficient electric machine technology and influencing their use are crucial to any global conservation, green energy, or alternative energy strategy.
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