Operating time characteristics for alarming
The operating timers’ behavior of the function can be set for trip signal and also for the release of the
function in case the pick-up element is reset before the trip time has been reached. The table below
presents the setting parameters for the function time characteristics.
Table. 5.3.5. - 62. Setting parameters for operating time characteristics.
Name
Range
Step Default
Description
FWD
reset time
0.000...1800.000
s
0.005
s
0.300 s
Forward start detection reset time. Starts to count from the rst detected
forward (faulty feeder) spike. If another spike is detected during counting,
it resets and starts from beginning. If it runs to the end, it resets the
function START signals.
REV reset
time
0.000…
1800.000 s
0.005
s
0.300 s
Reverse start detection reset time. Starts to count from the rst detected
reverse (healthy feeder) spike. If another spike is detected during
counting, it resets and starts from beginning. If it runs to the end, it resets
the function START signals.
Spikes to
indicate > 1...50
1
2
A calculated cumulative spikes comparator. In order to trip this a set
number of spikes must be exceeded. If the set operating time is reached
but the set number of spikes has not been reached, this setting function
will release without tripping when the FWD reset time has elapsed.
Events and registers
The intermittent earth fault function (abbreviated "EMON" in event block names) generates events and
registers from the status changes in the FWD alarm and in the REV alarm. 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. 5.3.5. - 63. Event codes.
Event Number
Event channel
Event block name
Event Code
Description
8648
135
EMON1
8
I0int> (67NT) Detect FWD ON
8649
135
EMON1
9
I0int> (67NT) Detect FWD OFF
8650
135
EMON1
10
I0int> (67NT) Detect REV ON
8651
135
EMON1
11
I0int> (67NT) Detect REV OFF
The table below presents the structure of the function's register content. This information is available
for the last twelve (12) recorded events for all provided instances separately.
Table. 5.3.5. - 64. Register content.
Date and
time
Event
code
Trip time
remaining
Started
FWD
Spikes FWD
Started
REV
Spikes to trip
Used SG
dd.mm.yyyy
hh:mm:ss.mss
8648-
8651
Descr.
Time
remaining
from the
set
operating
time.
Yes / No
indication
of forward
start in this
fault.
Calculated
cumulative
number of
forward
(faulty feeder)
spikes.
Yes / No
indication
of reverse
start in this
fault.
Set spikes to trip
subtracted by
cumulative forward
spikes. If 0, there are
enough spikes to trip.
Setting
group 1...8
active.
AQ-E215
Instruction manual
Version: 2.01
85
© Arcteq Relays Ltd