Eaton EMR-4000 - Page 46

EMR-4000 IM02602009E
4-wire System Ground Current CT Involving Neutral
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A B C
IA
IB
IC
1
X?.
2
3
4
5
6
7
8
9
10
11
12
4-wire system with ground current CT (Toroidal) involving Neutral; In secondary = 5 A.
IA
1A
5A
N
IB
1A
5A
N
IC
1A
5A
N
IX
1A
5A
N
IB'
IC'
IA'
N
IN
IX meas = IG
IR calc = IA + IB + IC
IR calc´
IG = IA + IB + IC + IN