Table. 5.3.16 - 142. Information displayed by the function.
Name
Range
Step
Description
P> condition
0: Normal
1: Start
2: Trip
3: Blocked
-
Displays the 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.
P meas/P set
at the
moment
1250.00P
m
/P
set
0.01P
m
/P
set
The ratio between the measured 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 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 startup power value 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 types please refer
to the chapter "General properties of a protection function" and its section "Operating time
characteristics for trip and reset".
Events and registers
The overpower function (abbreviated "OPW" 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 function offers one (1) independent stage.
The events triggered by the function are recorded with a time stamp and with process data values.
A
AQ
Q-F205
-F205
Instruction manual
Version: 2.04
208
© Arcteq Relays Ltd
IM00013
Summary of Contents for AQ F205
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