Figure 86: Hi-Z Ref Protection For A Grounded Star Winding; Figure 87: Hi-Z Ref Protection For A Delta Winding - GE P642 Technical Manual

Chapter 8 - Restricted Earth Fault Protection
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Figure 86: Hi-Z REF protection for a grounded star winding

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Figure 87: Hi-Z REF protection for a delta winding

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TN 1 CT
TN 2 CT
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Varistor
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P64x
P64x-TM-EN-1.3