السلام عليكم ورحمة الله وبركاته
The attached file shows an actual
Protecti** scheme grading.
what will be the behaviour of this scheme when a fault occurs ** the Nati**al grid at the indicated fault point.
Is it possible for the same protecti** device to have 67I= I>> 5KA, 0.3s and in the same time to have 50I= I>> 4KA, 1s
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