Arcteq Generator Commander, Instruction Manual

Page: 144 / 561

Table. 5.4.11 - 119. General settings of the function.
Name Range Default Description
U0> LN
mode
1: On
2:
Blocked
3: Test
4: Test/
Blocked
5: Off
0: On
Set mode of NOV block.
This parameter is visible only when Allow setting of individual LN mode is enabled in
General menu.
U0> meas
input select
1:
Select
2:
U0Calc
3: U3
Input
4: U4
Input
1:
Select
Defines which available measured magnitude is used by the function. U0Calc calculates
the voltage from phase voltages.
Please note that U3 Input and U4 Input selections are available only if the channel has
been set to U0 mode at Measurements
→
Transformers
→
VT module.
Pick-up
The U
set
setting parameter controls the pick-up of the U0> function. This defines the maximum allowed
measured voltage before action from the function. The function constantly calculates the ratio
between the U
set
and the measured magnitude ( U
m
) for neutral voltage. The reset ratio of 97 % is built
into the function and is always relative to the
U
set
value. The setting value is common for all measured
amplitudes, and when the
U
m
exceeds the
U
set
value it triggers the pick-up operation of the function.
Table. 5.4.11 - 120. Pick-up settings.
Name Description Range Step Default
Pick-up setting U0set> Pick-up setting 1.00…99.00%U
n
0.01%U
n
20.00%U
n
The pick-up activation of the function is not directly equal to the START signal generation of the
function. The START signal is allowed if the blocking condition is not active.
Read-only parameters
The relay's Info page displays useful, real-time information on the state of the protection function. It is
accessed either through the relay's HMI display, or through the setting tool software when it is
connected to the relay and its Live Edit mode is active.
Name Range Step Description
U0> LN
mode
behaviour
1: On
2: Blocked
3: Test
4: Test/Blocked
5: Off
-
Displays the mode of NOV block.
This parameter is visible only when
Allow setting of individual LN mode is
enabled in General menu.
U0>
Measuring
now
0: No U0 avail!
1: U0Calc
2: U3 Input
3: U4 Input
-
Displays which voltage channel is used by the function. If no voltage channel
has been selected the function defaults to calculated residual voltage if line-
to-neutral voltages have been connected to device. If no channel is set to
"U0" mode and line-to-line voltages are connected, no residual voltage is
available and "No U0 avail!" will be displayed.
U0> Pick-
up setting
0.0...1 000 000.0V 0.1V
Primary voltage required for tripping. The displayed pick-up voltage level
depends on the chosen U0 measurement input selection, on the pick-up
settings and on the voltage transformer settings.
Genera Generattor Commander or Commander
Instruction manual
Version: 2.07
142 © Arcteq Relays Ltd
IM00001