Name
Range
Step Default
Description
Enable
TM>
Rest
Inhibit
0: Disabled
1: Enabled
-
0:
Disabled Enabling/disabling the INHIBIT signal and the IO.
TM>
Inhibit
level
0.0…150.0 %
0.1
%
80 %
INHIBIT activation threshold.
TM> Trip
level
0.0…150.0 %
0.1
%
100 %
TRIP activation threshold.
TM> Trip
delay
0.000…3600.000
s
0.005
s
0.000 s
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.
The pick-up activation of the function is direct for all other signals except the TRIP signal which also
has a blocking check before the signal is generated.
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 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. 5.4.23 - 198. General status codes.
Name
Range
Description
TM> LN
behaviour
1: On
2: Blocked
3: Test
4: Test/
Blocked
5: Off
Displays the mode of TOLM block.
This parameter is visible only when
Allow setting of individual LN mode is enabled in General
menu.
A
AQ
Q-M257
-M257
Instruction manual
Version: 2.07
© Arcteq Relays Ltd
IM00021
253
Summary of Contents for AQ-M257
Page 1: ...AQ M257 Motor protection IED Instruction manual...
Page 2: ......
