MICROELETTRICA MC40-SEF, Operation Manual

Page: 27 / 36

MC40-SEF
Doc. N°
MO-0475-ING
Copyright 2012 FW: 1320.38.01.x Date 06.09.2022 Rev. 1 Pag. 27 of 36
12.4 - LastTrip (Event Recording)
The MC records any tripping and stores the information relevant to the last 20 tripping of protection functions
(FIFO). Each event recording includes the following information.
“ Re al Time Meas”
“LastTrip”
1 st event,
to scroll available events,
to “Rec #” selected,
to select the different fields;
Display Description
Func xxxxx Indication of the protection function which caused the relay tripping.
For indication of the TRIP Cause the following acronyms are used:
T> = Thermal Image
I> = 1 st Overcurrent (Short Circuit)
I>> = 2 nd Overcurrent (Short Circuit)
IH = 3 rd Overcurrent (Short Circuit)
Io> = 1 st Neutral Element
Io>> = 2 nd Neutral Element
IoH = 3 rd Neutral Element
So> = Sensitive Neutral Element
RTD = External Trip commands
IRF = Internal Relay Fault
Date : YYYY/MM/GG Date: Year/Month/Day
Time : hh:mm:ss:cc Time: hours/minutes/second/hundredths of seconds
IA = 0 – 65535 A RMS value of phase A current (Primary Amps)
IB = 0 – 65535 A RMS value of phase B current (Primary Amps)
IC = 0 – 65535 A RMS value of phase C current (Primary Amps)
Io = 0.0 – 6553.5 A RMS value of Zero Sequence Current (Primary Amps)
Tem = 0 - 65535 %T Actual temperature rise
to go back to “Rec #” ,
to go back to “Real Time Meas” .