7.8
SEL-421 Relay Instruction Manual Date Code 20171021
Metering, Monitoring, and Reporting
Reporting
When the event report digital setting is set to include all Relay Word bits in the
event report (ERDIG = A), the maximum number of stored reports is reduced, as
shown in Table 7.8.
Event Reports, Event Summaries, and Event Histories
See Event Reports, Event Summaries, and Event Histories on page 9.13 in the
SEL-400 Series Relays Instruction Manual for an overview of event reports,
event summaries, and event histories. This section describes the characteristics of
those that are unique to the SEL-421.
Base Set of Relay Word Bits
The following Relay Word bits are always including in 8 kHz oscillography and
compressed event reports: TLED_1, TLED_2, TLED_3, TLED_4, TLED_5,
TLED_6, TLED_7, TLED_8, TLED_9, TLED_10, TLED_11, TLED_12,
TLED_13, TLED_14, TLED_15, TLED_16, TLED_17, TLED_18, TLED_19,
TLED_20, TLED_21, TLED_22, TLED_23, TLED_24, SPOA, SPOB, SPOC,
FSA, FSB, FSC, Z1P, Z2P, Z3P, Z4P, Z5P, Z123PFL, 67Q1, 67Q2, 67Q3,67Q4,
51S1, 51S2, 51S3, Z1G, Z2G, Z3G, Z4G, Z5G, Z123GFL, 67G1, 67G2, 67G3,
67G4, RMBnA, TMBnA, RMBnB, TMBnB, ROKA, RBADA, CBADA,
LBOKA, ROKB, RBADB, CBADB, LBOKB, TRIP, TPx1, TPx2, 52xCL1,
52xCL2, BK1CL, BK2CL (n = 1–8, x = A, B, C).
Table 7.7 Event Report Nonvolatile Storage Capability When ERDIG = S
Event Report Length
Maximum Number of Stored Reports
8 kHz 4 kHz 2 kHz 1 kHz
0.25 seconds 161 193 212 248
0.50 seconds 98 123 139 173
1.0 seconds 54 70 82 107
3.0 seconds 19 25 30 41
6.0 seconds N/A 12 15 21
12.0 seconds N/A N/A 7 10
24.0 seconds N/A N/A N/A 4
Table 7.8 Event Report Nonvolatile Storage Capability When ERDIG = A
Event Report Length
Maximum Number of Stored Reports
8 kHz 4 kHz 2 kHz 1 kHz
0.25 seconds 125 148 159 180
0.50 seconds 74 89 98 112
1.0 seconds N/A 49 54 64
3.0 seconds N/A N/A 19 23
6.0 seconds N/A N/A N/A 11
12.0 seconds N/A N/A N/A N/A
24.0 seconds N/A N/A N/A N/A
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