ABB RELION REX640 Technical Manual page 438

Section 4
Protection functions
432
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Figure 231: Operating characteristic Iosin(φ) in reverse fault
Example 3.
Iocos(φ) criterion selected, forward-type fault
=> FAULT_DIR = 1
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Figure 232: Operating characteristic Iocos(φ) in forward fault
Example 4.
1MRS759142 C
REX640
Technical Manual