题目内容
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633608306.gif)
(1)发电机输出电流和输电线上的电流大小。
(2)在输电线路中设置的升、降变压器原、副线圈的匝数比.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241156336235069.gif)
(1)20A(2)240/11
(1)输出电流为:
(3分)
输电线上的电流I2为:
∴I2="20A " (3分)
(2)升压变压器原副线圈匝数比为:
(3分)
用户端干路电流I4为:
∴![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633686527.gif)
∴降压变压器原副线圈匝数比为:
(3分)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633639540.gif)
输电线上的电流I2为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633655468.gif)
(2)升压变压器原副线圈匝数比为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633655527.gif)
用户端干路电流I4为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633670518.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633686527.gif)
∴降压变压器原副线圈匝数比为:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824115633717575.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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