Date Code 20011026 Applications 5-25
SEL-321/321-1 Instruction Manual
Event Report Trigger Condition Logic
The relay allows selection of which elements trigger an event report (MER logic mask). An
event report is always generated when the relay issues a trip. However, there may be other
conditions that require event report generation.
For our example event reports are generated when the time delayed tripping elements timeout,
when the high-set phase overcurrent element picks up and on loss-of-potential when the breaker
is closed.
Output Contact Logic
Each output contact is programmed using SEL
OGIC control equations. For our example the relay
is required to trip three-pole, close the breaker via the CLOSE command and key the permissive
trip signal.
The remaining contacts can be used for local substation annunciation, sequence-of-events
recording, or SCADA indication. These requirements are dictated by your particular relay
application.
V =
NA
NANA
NA
W =
NA
NANA
NA
X =
NA
NANA
NA
Y =
NA
NANA
NA
Z =
NA
NANA
NA
MTCS =
M2P + Z2G
M2P + Z2GM2P + Z2G
M2P + Z2G
MTU =
M1P + Z1G + M2PT + Z2GT + 51NT + 51QT + 50MF
M1P + Z1G + M2PT + Z2GT + 51NT + 51QT + 50MFM1P + Z1G + M2PT + Z2GT + 51NT + 51QT + 50MF
M1P + Z1G + M2PT + Z2GT + 51NT + 51QT + 50MF
MTO =
M1P + M2P + Z1G + Z2G + 50H
M1P + M2P + Z1G + Z2G + 50HM1P + M2P + Z1G + Z2G + 50H
M1P + M2P + Z1G + Z2G + 50H
MER =
M2P + Z2G + 51NP + 51QP + 50H + LOP * 52AA1
M2P + Z2G + 51NP + 51QP + 50H + LOP * 52AA1M2P + Z2G + 51NP + 51QP + 50H + LOP * 52AA1
M2P + Z2G + 51NP + 51QP + 50H + LOP * 52AA1
OUT1 =
3PT
3PT3PT
3PT
OUT2 =
3PT
3PT3PT
3PT
OUT3 =
CC
CCCC
CC
OUT4 =
KEY
KEYKEY
KEY
OUT5 =
NA
NANA
NA
OUT6 =
NA
NANA
NA
OUT7 =
NA
NANA
NA
OUT8 =
NA
NANA
NA
OUT9 =
NA
NANA
NA
OUT10 =
NA
NANA
NA
OUT11 =
NA
NANA
NA
OUT12 =
NA
NANA
NA
OUT13 =
NA
NANA
NA
OUT14 =
NA
NANA
NA
OUT15 =
NA
NANA
NA
TMB1 = NA
NANA
NA
TMB2 = NA
NANA
NA
TMB2 = NA
NANA
NA
TMB3 = NA
NANA
NA
TMB4 = NA
NANA
NA
TMB5 = NA
NANA
NA
TMB6 = NA
NANA
NA
TMB7 = NA
NANA
NA
TMB8 = NA
NANA
NA
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