Siemens SIPROTEC 7UT633*-* N series - Time Overcurrent Protection for Phase Currents; Setting Notes

2.4 Time Overcurrent Protection for Phase and Residual Currents
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7UT613/63x Manual
C53000-G1176-C160-2
Figure 2-74 Fast busbar protection using reverse interlock — principle
2.4.2 Time Overcurrent Protection for Phase Currents
The function and operation of the definite-time overcurrent protection and of the
inverse-time overcurrent protection for residual current is discussed in detail in section
„Overcurrent Time Protection - General“ (see subsection 2.4.1).
The following paragraphs contain the specific information for setting the overcurrent
protection for phase currents Phase O/C.
2.4.2.1 Setting Notes
General
Note
The first overcurrent protection for phase currents is described in the setting instruc-
tions. The parameter addresses and message numbers of the second and third over-
current protection are described at the end of the setting instructions under „Additional
Overcurrent Protection Functions for Phase Currents“.
During configuration of the functional scope (section 2.1.3) the characteristic type is
determined under address 120 DMT/IDMT Phase. Only the settings for the selected