Name
Range
Step
Default
Description
Enable
TT>
Rest
Inhibit
0: Disabled
1: Enabled
-
0:
Disabled Enabling/disabling the INHIBIT signal and the I/O.
TT>
Inhibit
level
0.0…150.0%
0.1%
80%
INHIBIT activation threshold.
Enable
TT> Trip
0: Disabled
1: Enabled
-
0:
Disabled Enabling/disabling the TRIP signal and the I/O.
TT> Trip
level
0.0…150.0%
0.1%
100%
TRIP activation threshold.
TT> Trip
delay
0.000…3600.000s 0.005s 0.000s
The trip signal's additional delay. This delay delays the trip signal
generation by a set time. The default setting is 0.000 s which does
not give an added time delay for the trip signal.
Function blocking
he 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 current 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.
Measurements and indications
The function outputs measured process data from the following magnitudes:
Table. 5.3.9 - 80. General status codes.
Name
Range
Description
TT> LN
behaviour
1: On
2: Blocked
3: Test
4: Test/
Blocked
5: Off
Set mode of TOLT block.
This parameter is visible only when
Allow setting of individual LN mode is enabled in General menu.
A
AQ
Q-T256
-T256
Instruction manual
Version: 2.06
100
© Arcteq Relays Ltd
IM00028
Summary of Contents for AQ-T256
Page 1: ...AQ T256 Transformer protection IED Instruction manual...
Page 2: ......
