Looking for books of power system protection with a specific excercises

Thread Starter

sego_sk8

Joined Oct 7, 2021
6
Hi guys, i´m looking for books where i can find the excercises attached.
Any idea where can i find them??
Would be a great help if you can help me finding the book.

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Thread Starter

sego_sk8

Joined Oct 7, 2021
6
hi sego,
Are these Homework assignment questions.?
E
In fact yes,

The image of the transformer refers to the next assignment:

Find the pickup current of the 87N protection. Transfo of 40MVA, 115 kv / 13.8 kV, Delta/Wye ground conection, conected to earth throught a 20 Ohm resistance. Assume that the short circuit current is the 10% of the phase current.

The image of the generator winding refers to the next assignment:

For the power system shown, find the three and one phase short circuit currents in F1 and F2. Find the actuation conditions with percent adjustment of the 87 protection.

I really like to know where can i find the problems
 
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