Sel 411L - Page 631

P.8.19
Date Code 20151029 Protection Manual SEL-411L Relay
Oscillography, Events, and SER
Event Reports, Event Summaries, and Event Histories
Digital Section of the Event Report
The second portion of an event report is the digital section. Inspect the digital
data to evaluate relay element response during an event. See Figure 8.9 for the
locations of items in a sample event report digital section. If you want to view
only the digital portion of an event report, use the EVE D command. In the
digital portion of the event report, the relay indicates deasserted elements with
a period (.) and asserted elements with an asterisk (*) character.
The element and digital information labels are single character columns. Read
these columns from top to bottom. The trigger row includes a > character
following immediately after the last digital element column to indicate the
trigger point. The relay marks the row used to report the maximum fault
current with an asterisk (*) character at the right of the last digital element
ICR3 Terminal 3, filtered total remote current, Phase C
IQR3 Terminal 3, filtered total negative-sequence current
IGR3 Terminal 3, filtered total zero-sequence current
DIA Filtered differential current phasor, Phase A
DIB Filtered differential current phasor, Phase B
DIC Filtered differential current phasor, Phase C
DIQ Filtered negative-sequence differential current (3I2) phasor
DIG Filtered zero-sequence differential current (3I0) phasor
IARST Fundamental frequency restraining current, Phase A
IBRST Fundamental frequency restraining current, Phase B
ICRST Fundamental frequency restraining current, Phase C
IQRST Negative-sequence restraining current (3I2)
IGRST Zero-sequence restraining current (3I0)
87KA Ratio of the equivalent alpha plane, Phase A
87KB Ratio of the equivalent alpha plane, Phase B
87KC Ratio of the equivalent alpha plane, Phase C
87KQ Ratio of the equivalent alpha plane, negative-sequence
87KG Ratio of the equivalent alpha plane, zero-sequence
87APAA Angle of the equivalent alpha plane, Phase A
87APAB Angle of the equivalent alpha plane, Phase B
87APAC Angle of the equivalent alpha plane, Phase C
87APQ Angle of the equivalent alpha plane, negative-sequence
87APG Angle of the equivalent alpha plane, zero-sequence
87KHRA Ratio of the equivalent harmonic-restrained alpha plane, Phase A
87KHRB Ratio of the equivalent harmonic-restrained alpha plane, Phase B
87KHRC Ratio of the equivalent harmonic-restrained alpha plane, Phase C
87HRAA Angle of the equivalent harmonic-restrained alpha plane, Phase A
87HRAB Angle of the equivalent harmonic-restrained alpha plane, Phase B
87HRAC Angle of the equivalent harmonic-restrained alpha plane, Phase C
Table 8.6 87L Event Report Analog Quantities (Sheet 2 of 2)
Quantity Description