12.18
SEL-351A Relay Instruction Manual Date Code 20080213
Standard Event Reports and SER
Standard 15/30-Cycle Event Reports
81 56 81D5, 81D6 5 Frequency element 81D5 picked
up.
6 Frequency element 81D6 picked
up.
b Both 81D5 and 81D6 picked up.
79 RCSF, CF, 79RS,
79CY, 79LO
.
S
Reclosing relay nonexistent.
Reclose supervision failure condi-
tion (RCSF asserts for only 1/4
cycle).
F Close failure condition (CF asserts
for only 1/4 cycle).
R Reclosing relay in Reset State
(79RS).
C Reclosing relay in Reclose Cycle
State (79CY).
L Reclosing relay in Lockout State
(79LO).
Time OPTMN, RSTMN o Recloser open interval timer is tim-
ing.
r Recloser reset interval timer is tim-
ing.
Shot SH0, SH1, SH2
SH3, SH4
.
0
Reclosing relay nonexistent.
shot = 0 (SH0).
1 shot = 1 (SH1).
2 shot = 2 (SH2).
3 shot = 3 (SH3).
4 shot = 4 (SH4).
Zld ZLIN, ZLOUT i Load encroachment “load in” ele-
ment ZLIN picked up.
o Load encroachment “load out” ele-
ment ZLOUT picked up.
LOP LOP * Loss-of-potential element LOP
picked up.
Vdc DCHI, DCLO H Station battery instantaneous over-
voltage element DCHI picked up.
L Station battery instantaneous und-
ervoltage element DCLO picked
up.
b Both DCHI and DCLO asserted.
Lcl 12 LB1, LB2 1 Local bit LB1 asserted.
2 Local bit LB2 asserted.
b Both LB1 and LB2 asserted.
Lcl 34 LB3, LB4 3 Local bit LB3 asserted.
4 Local bit LB4 asserted.
b Both LB3 and LB4 asserted.
Table 12.3 Output, Input, and Protection, and Control Element Event Report
Columns (Sheet 7 of 9)
Column Heading
Corresponding
Elements (Relay
Word Bits)
Symbol Definition
Courtesy of NationalSwitchgear.com
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