Date Code 20011026 Event Reporting 4-1
SEL-321/321-1 Instruction Manual
SECTION 4: EVENT REPORTING
EVENT REPORT GENERATION
The relay generates event reports in response to the actions listed in Table 4.1. Four different
event report formats are available. Which event report format you select to review depends upon
the amount of data resolution you require. These formats are:
• Summary Quick review of critical fault information for operations personnel
• Default 1/4-cycle data resolution for quick review of routine relay operations
• Long 1/16-cycle data resolution for detailed review
• Computer Use with the SEL-5601 program for detailed review and oscillograph
plotting
All summary event reports are automatically sent to all communications ports designated as
AUTO in the relay setting communications port settings. The relay can store up to twelve event
reports (see EVENT command in Section 3: Communications for more details.)
Table 4.1: Event Report Triggering Actions
• Any tripping element assertions (TPA, TPB, TPC, or 3PT)
• TRIGGER command execution
• Assertion of any element in the MER (mask for event report trigger) logic variable
• External Trigger input assertions
For event reports triggered by TPA, TPB, TPC, or 3PT assertion, the TYPE designation is
appended with a "T." This makes it easy to distinguish between event reports that involve a trip
and those which do not.
Table 4.2 lists relay elements which must assert for the relay to record a fault type and fault
location in the event report. If none of these elements assert and any action listed in Table 4.1 is
true, the relay generates an event report but does not list a fault type or calculate a fault location.
Table 4.2: Event Report Fault Type and Fault Location Enabling Elements
Fault Type Elements
Phase-phase or three-phase M1P M2P M3P M4P
Single-Line-Ground Z1G
67N1
Z2G
67N2
Z3G
67N3
Z4G
67N4
51NP
Event records taken with no triggering relay elements have the type shown in Table 4.3.
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