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CT with turns calculation

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  1. dukeofsmooth's Avatar
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    CT with turns calculation

    Shown below is a current transformer with the number of turns between taps. In the space provided, write the calculated voltage for taps X1 to X3 when 200 V is applied to the full secondary winding (X1 to X5).

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    Quote Originally Posted by dukeofsmooth View Post
    Shown below is a current transformer with the number of turns between taps. In the space provided, write the calculated voltage for taps X1 to X3 when 200 V is applied to the full secondary winding (X1 to X5).

    Click image for larger version. 

Name:	coil.jpg 
Views:	77 
Size:	17.0 KB 
ID:	324
    So, you know the turns for X1-X5 is 100. We also know that the turns added together for X1-X3 is 30. Then we apply 200V to X1-X5 and read X1-X3.

    So. (100/200V)=(30/X) => X=(30*200V)/100 = 60V

    Simply put it is just a ratio of the turns you are measuring compared to the overall turns applied voltage.

    Here's a good pdf explanation on CT testing speaking about this specifically:
    CT Testing Basics.pdf

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    another way to calculate the ans

    another way to calculate
    find percent of coils 200v x 60%= 0.6 x 100=60v

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