Events and registers
The I> function (abbreviated EMON in event block names) generates events and registers from the
status changes in ALARM events. The user can select the status ON or OFF for messages in the main
event buffer.
The triggering event of the function is recorded with a time stamp and with process data values.
Table. 5.3.1. - 46. Event codes.
Event number
Event channel
Event block name
Event code
Description
8640
135
EMON1
0
I> (50) Detect ON
8641
135
EMON1
1
I> (50) Detect OFF
The function registers its operation into the last twelve (12) time stamped registers. The ON event
process data for ALARM is recorded in the register of the function.
Table. 5.3.1. - 47. Register content.
Date and time
Event
code
Fault type
Max I
m
/I
set
Used SG
dd.mm.yyyy
hh:mm:ss.mss
8640-8641
Descr.
L1-G…L1-
L2-L3
The ratio between the highest phase current and
the pick-up value.
Setting group 1...8
active.
5.3.2. Non-directional earth fault (I0>; 50N)
The non-directional earth fault function is used for instant and time-delayed earth fault alarms. The
operating decisions are based on the selected residual current magnitudes, which the function
constantly measures. The monitored current magnitude is equal to fundamental frequency RMS
values. The monitored residual current measurement channel can be selected to be the I01 or the I02
channel; the user can also choose the I0Calc channel which is the residual current calculated from
phase current channels. The setting group selection controls the operating characteristics of the
function during normal operation, i.e. the user or user-de ned logic can change function parameters
while the function is running.
The output of the function is the ALARM signal. The non-directional earth fault function uses a total of
eight (8) separate setting groups which can be selected from one common source.
The operational logic consists of the following:
input magnitude selection
input magnitude processing
saturation check
threshold comparator
output processing.
The inputs for the function are the following:
operating mode selections
setting parameters
digital inputs and logic signals
measured and pre-processed current magnitudes.
AQ-E215
Instruction manual
Version: 2.01
© Arcteq Relays Ltd
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