Phase Selection Element; Four Step Directional Negative Phase Sequence Overcurrent Protection Ns4Ptoc (46I2) - Hitachi Relion 670 Series Applications Manual

1MRK511407-UUS Rev. N
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EQUATION1722 V1 EN-US
Further description can be found in the technical reference manual.
tPRCrvx, tTRCrvx, tCRCrvx: Parameters for user programmable of inverse reset time characteristic
curve. Further description can be found in the technical reference manual.
8.2.3.6

Phase selection element

The phase selection feature is controlled by the setting EnPhaseSel. The phase selection output
PHSELL1, PHSELL2, and PHSELL3 from EF4PTOC shall be connected to phase selection inputs PS1L,
PSL2, and PSL3 of the trip logic SMPPTRC, as shown in
IEC050004933 V1 EN-US
Figure 61:
The EF4PTOC function includes four steps with different set values. The input 1PTREF of SMPPTRC
shall be connected to the trip output of the stage(s) from EF4PTOC that are intended for phase selective
tripping.
8.3 Four step directional negative phase sequence
overcurrent protection NS4PTOC (46I2)
Phasor measurement unit RES670
Application manual
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Connection of phase selection outputs PHSELL1, PHSELL2, and PHSELL3
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Section 8
Current protection
(Equation 41)
125