Eaton EDR 3000 Installation, Operation And Maintenance Manual page 479

Zone Interlocking Trip Logic [X2]
The following overcurrent protection elements trigger Phase Zone-Interlock trip functions:
1.5 * 51P[1];
50P[1]; and
50P[2].
The following overcurrent protection elements trigger Ground Zone Interlock trip functions:
51X[1];
50X[1];
50X[2];
51R[1];
50R[1], and
50R[2].
EDR-3000
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