Arcteq Generator Commander, Instruction Manual

Page: 214 / 561

Table. 5.4.18 - 173. Information displayed by the function.
Name Range Step Description
Q< LN
behaviour
1: On
2: Blocked
3: Test
4: Test/Blocked
5: Off
-
Displays the mode of UEX block.
This parameter is visible only when Allow setting of individual LN
mode is enabled in General menu.
Q< condition
0: Normal
1: Start
2: Trip
3: Blocked
- Displays the status of the protection function.
Q< selected
measurement
0: POW1CT1
1: POW1CT2
2: POW2CT1
3: POW2CT2
4: Undefined
-
Displays the selected power measurement.
This indication is visible if the device has more than one current
measurement unit.
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.
Q
meas
/Q
set
at the
moment
-1250.00...1250.00Q
m
/Q
set
0.01Q
m
/Q
set
The ratio between the measured reactive power and the pick-up
value.
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 processes the release time characteristics 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 startup power values and its fault type to be issued.
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.
Operating time characteristics for trip and reset
This function supports definite time delay (DT). For detailed information on this delay type please refer
to the chapter "General properties of a protection function" and its section "Operating time
characteristics for trip and reset".
Genera Generattor Commander or Commander
Instruction manual
Version: 2.07
212 © Arcteq Relays Ltd
IM00001