Table. 5.4.9. - 100. Operating mode and input signals selection
Name
Range
Step
Default
Description
I0Input
Not in use
I01
I02
I0Calc
-
Not in
use
Selection of the residual current monitoring from the two separate residual
measurements I01 and I02 or from phase currents calculated residual
current.
Actmode
0:Current only
1:DO only
2:Signals only
3:Current and
DO
4:Current or
DO
5:Current and
signals
6:Current or
signals
7:Signals and
DO
8:Signals or DO
9:Current or
DO or signals
10:Current and
DO and Signals
-
0:Current
only
Operating mode selection. Mode can be dependent of current
measurement, digital channel status or combination of these.
Table. 5.4.9. - 101. Pick-up characteristics setting
Name
Range
Step
Default
Description
Iset
0.01 …
40.00xIn
0.01xIn
0.20 x In Pick-up threshold for phase current measurement. This setting limit de nes the
upper limit for the phase current pick-up element.
I0set
0.005 …
40.000xIn
0.001xIn 1.200xIn Pick-up threshold for residual current measurement. This setting limit de nes
the upper limit for the phase current pick-up element.
The pick-up activation of the function is not directly equal to start-signal generation of the function.
Start signal is allowed if blocking condition is not active. From binary signals the activation of the pick-
up is immediate when the monitored signal is activated.
Function blocking
In the blocking element the block signal is checked in the beginning of each program cycle. Blocking
signal is received from the blocking matrix for the function 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 blocking signal is active when pick-up element activates a BLOCKED signal will be generated and the
function shall not process the situation further. If START function has been activated before blocking
signal it will reset and the release time characteristics are processed as in case of when pick-up signal
is reset.
From blocking of the function a HMI display event as well as time stamped blocking event with
information of the startup current values and fault type is issued.
Blocking signal can be tested also in the commissioning phase of the stage by software switch signal
when relay common and global testing mode is activated.
User settable variables are binary signals from the system. Blocking signal needs to reach the IED
minimum of 5 ms before the set operating delay has passedfor blocking to be active in time.
AQ-F255
Instruction manual
Version: 2.00
103
© Arcteq Relays Ltd
