Schweitzer Engineering Laboratories SEL-751 - Table 10.1 Event Types

10.4
SEL-751 Relay Instruction Manual Date Code 20170927
Analyzing Events
Event Reporting
The relay sends event summaries to all serial ports with setting AUTO := Y
each time an event triggers.
Event Logs
The Event Logs field shows the number of events presently stored in the Flash
memory of the relay.
Event Reference Number
The Event Reference Number is a unique event identification number
assigned to the event. The unique event identification number of any event can
be found by issuing the HIS command (see Viewing the Event History on
page 10.8 for details). The Event Reference Number starts at 10000 and
increments with each new event to a maximum of 42767. The Event
Reference Number rolls over to 10000 after reaching the next event after event
42767. The Event Reference Number can be reset to 10000 by using the
HIS CA command.
Event Type
The Event field displays the event type. Event types and the logic used to
determine event types are shown in Table 10.1. The event type designations
AG through CAG are only entered in the
Event field if the fault type is
determined successfully.
Current Mag
IA IB IC IN IG
(A) 2.3 9.3 8.5 0.01 2.97
Voltage Mag
VAB VBC VCA
(V) 72 110 76
Figure 10.1 Example Event Summary (Continued)
Table 10.1 Event Types (Sheet 1 of 2)
Event Type Event Type Logic
Arc Flash Trip
(50PAF + 50NAF) * (TOL1 + TOL2 + TOL3 + TOL4 + TOL5 + TOL6 + TOL7 + TOL8) * TRIP
AG,BG,CG
Single phase-to-ground faults. Appends T if any overcurrent trip asserted.
ABC
Three-phase faults. Appends T if any overcurrent trip asserted.
AB, BC, CA
Phase-to-phase faults. Appends T if any overcurrent trip asserted.
ABG, BCG, CAG
Phase-to-phase-to-ground faults. Appends T if any overcurrent trip asserted.
Phase A1 50 Trip
50A1P * (50P1T + 67P1T) * TRIP
a
Phase B1 50 Trip
50B1P * (50P1T + 67P1T) * TRIP
a
Phase C1 50 Trip
50C1P * (50P1T + 67P1T) * TRIP
a
Phase 50 Trip
(50P1T + 50P2T + 50P3T + 50P4T +67P1T +67P2T +67P3T +67P4T) * TRIP
a
GND/NEUT 50 Trip
(50N1T + 50N2T + 50N3T + 50N4T + 50G1T + 50G2T + 50G3T + 50G4T + 67G1T + 67G2T +
67G3T + 67G4T + 67N1T + 67N2T + 67N3T + 67N4T) * TRIP
a
NEG SEQ 50 Trip
(50Q1T + 50Q2T + 50Q3T + 50Q4T+ 67Q1T + 67Q2T + 67Q3T + 67Q4T) * TRIP
a
Phase A 51 Trip
51AT * TRIP
a
Phase B 51 Trip
51BT * TRIP
a
Phase C 51 Trip
51CT * TRIP
a
Phase 51 Trip
(51P1T + 51P2T) * TRIP
a