ABB REL300 Instruction Manual page 72

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I.L. 40-385.7
* Reverse-Looking Zone Three
NOTE:
Z3GF = "TRIP DIRECTION' Reach
Z3GR = "NON-TRIP" Reach
3-28
Z 3
Z3GF*
Z1GR
Z2GR
Figure 3-2 Mho Characteristic for Phase-Ground Faults
+jX
Z2GF
Z3GR*
Z1GF
PANG
Z 1
Z 2
R

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