2007-05-16 05:22:59 · 4 answers · asked by tamperfinder 2 in Science & Mathematics ➔ Engineering
You have to go back around 100 years. During the evolution of electricial equipment there were many manufacturers. The electric companies and their distribution systems did not tie to one another. Since each was an "island", there was little need for common voltages.
Over the years the small electric companies merged and began to tie systems together. Often the bigger fish defined the future voltage of the system. In some cases it was too expensive to convert over just for the sake of commonality.
In the US, here are just a few of the common distribution voltages near 11 kV that still used today. In some cases, several of these exist within one electric company.
12 kV
12.47 kV
13.2 kV
13.8 kV
14.4 kV
Obviously circuits of different voltages are not tied together without boost/buck transformers.
2007-05-16 08:17:43 · answer #1 · answered by Thomas C 6 · 1⤊ 0⤋
Why 10kV instead of 11kV.
Distribution systems developed around different application rather than being planned and at some point it was decided to make a standard based on what was easiest at that point probably the most used.
2007-05-16 12:28:14 · answer #2 · answered by Poor one 6 · 0⤊ 0⤋
The higher the KV the lower the Current. Maybe the amperage resulting from 11KV was easier to handle with components available.
2007-05-16 12:59:46 · answer #3 · answered by Caretaker 7 · 1⤊ 1⤋
The wrong taps were used on the transformer.
The generation equipment is malfunctioning.
2007-05-16 14:17:52 · answer #4 · answered by Anonymous · 0⤊ 1⤋