Settings; Protection 51P-1, 51P-2 & 51P-3; Figure 13: Security Log As Viewed In "Admin" Mode - ABB Eagle Programming Manual

Figure 13: Security log as viewed in "Admin" mode

4.4. Settings

4.4.1. Protection 51P-1, 51P-2 & 51P-3
The single-phase overcurrent protections, 51P-1, 51P-2 & 51P-3 are used as non-
directional overcurrent, short-circuit protection.
The trip time characteristics for 51P-1, 51P-2 and 51P-3 can be selected to be either
definite (DT) or standard inverse definite minimum time (IDMT) or user defined inverse
definite minimum time curves through the setting Curve. The behavior can also be
configured through a Curve file and will be discussed in section 4.4.9 on Import/Export of
Settings/Curve file.
In the DT mode, the function trips after a predefined trip time and resets when the fault
current drops below the threshold. This delay time can be set using the setting t.
The trip outputs of the function can be blocked using the settings Block. Once set to "Yes",
the trip output of the function is disabled and for all practical purposes the protection is
not effective, though measurement will work as normal.
The over current protection function can be made sensitive to Inrush conditions by
enabling the setting Block during inrush. Similarly, the 51P-1, 51P-2 & 51P-3 functions can
be made sensitive to Cold load pickup conditions by enabling the CLP apply.
Other needed settings Time multiplier (K) and Min trip delay (TDMin) for IDMT are also
available in setting Settings - Protection page.
If the Non reclose mode is enabled either by the NRM handle or from Web HMI, then the
pickup value of the over current protection is reduced a factor of the HLT multiplier X
Hot line
and trip time is reduced by a factor of the HLT time multiplier T . The details of
tag Hot line tag
these settings can be found in Section 4.4.6.
Table 4 51P-1 Settings
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