Instruction manual –AQ F210 Feeder Protection IED
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time. Default setting is 0.000s which will not
give added time delay for the trip signal.
The pick-up activation of the IO is direct for all other signals except TRIP signal which has
also blocking check before the trip signal is generated.
4.2.8.4
F
UNCTION 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 Trip 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 Trip 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 passed for blocking to be active
in time.
4.2.8.5
M
EASUREMENTS AND INDICATIONS OF THE FUNCTION
TOLF function outputs measured process data from following magnitudes:
Table 4.2.8.5-65 General status codes
Name
Range
Description
TF> Condition
0: Normal
1: Alarm1 On
2: Alarm2 On
3: Inhibit On
4: Trip On
5: Blocked
TOLF function operating condition at the moment considering binary
IO signal status. When the status is “Normal” no outputs are
controlled.
Thermal status 0: Light / No load
1: High overload
2: Overloading
3: Load normal
TOLF function thermal image status. When the measured current is
below 1 % of nominal status “Light / No load” will be shown, when the
measured current is below trip limit status “Load normal” will be
shown, when the measured current is over pick-up limit but under 2
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