Table. 5.4.25 - 218. Information displayed by the function.
Name
Range
Step
Description
I>U< I.A.E LN
behaviour
1: On
2: Blocked
3: Test
4: Test/Blocked
5: Off
-
Displays the mode of IAE block.
This parameter is visible only when
Allow setting of individual LN
mode is enabled in General menu.
I>U<
I.A.E condition
0: Normal
1: Start
2: Trip
3: Blocked
-
Displays status of the protection function.
Expected
operating time
0.000...1800.000s
0.005s Displays the expected operating time when a fault occurs.
Time remaining
to trip
-1800.000...1800.000s 0.005s When the function has detected a fault and counts down time towards a
trip, this displays how much time is left before tripping occurs.
Measured
voltage / set
now
0.00...1250.00
0.01
The ratio between the positive sequence voltage and the pick-up
setting.
Measured min
current / set
now
0.00...1250.00
0.01
The ratio between the lowest measured phase current and the pick-up
setting.
Function blocking
The block signal is checked in the beginning of each program cycle. The blocking signal is received
from the blocking matrix in the function's dedicated input. If the blocking signal is not activated when
the pick-up element activates, a START signal is generated and the function proceeds to the time
characteristics calculation.
If the blocking signal is active when the pick-up element activates, a BLOCKED signal is generated and
the function does not process the situation further. If the START function has been activated before the
blocking signal, it resets and the release time characteristics are processed similarly to when the pick-
up signal is reset.
The blocking of the function causes an HMI display event and a-time stamped blocking event with
information of the impedance values.
The blocking signal can also be tested in the commissioning phase by a software switch signal when
the relay's testing mode "Enable stage forcing" is activated (
General
→
Device).
The variables the user can set are binary signals from the system. The blocking signal needs to reach
the device minimum of 5 ms before the set operating delay has passed in order for the blocking to
activate in time.
Events and registers
The inadvertent energizing protection function (abbreviated "IAE" in event block names) generates
events and registers from the status changes in START, TRIP and BLOCKED. The user can select
which event messages are stored in the main event buffer: ON, OFF, or both.
The events triggered by the function are recorded with a time stamp and with process data values.
Table. 5.4.25 - 219. Event messages.
Event block name
Event names
IAE1
Start ON
Genera
Generattor Commander
or Commander
Instruction manual
Version: 2.07
© Arcteq Relays Ltd
IM00001
245
Summary of Contents for Generator Commander
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