Protection Engineering Basics and Schemes Protection Engineering | Page 99

For component,

E a0 = 1 3( E a + E b + E c)

E a1 = 1 3( E a + aE b + a 2 E c)

E a2 = 1 3( E a + a 2 E b + aE c)

Similar for component of E b and E c

In normal balance system, positive sequence components exist, in abnormal condition negative sequence and zero sequence component also exist.

4.3 Phase to ground fault

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