April 2011
Intermediate to advanced
992 pages
28h 25m
English
Content preview from J & P Transformer Book, 13th Edition
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The Brentford linear regulating transformer
The Brentford voltage regulating transformer (VRT) is an autotransformer having a single layer coil on which carbon rollers make electrical contact with each successive turn of the winding. It can be designed for single- or three-phase operation and for either oil-immersed or dry-type construction. The winding is of the helical type which allows three-phase units to be built with a three-limb core as for a conventional transformer.
Figure 4.79 Principle of the moving coil type of voltage regulator
Figure 4.80 Core and coil assemblies of a three-phase, 5 MVA throughput 50 Hz moving coil regulator ...
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