14.6.3.1
Recording times
M12179-88 v5
Prefault recording time (
PreFaultRecT
) is the recording time before the starting point
of the disturbance. The setting should be at least
0.1
s to ensure enough samples for the
estimation of pre-fault values in the Trip value recorder (TVR) function.
Postfault recording time (
PostFaultRecT
) is the maximum recording time after the
disappearance of the trig-signal (does not influence the Trip value recorder (TVR)
function).
Recording time limit (
TimeLimit
) is the maximum recording time after trig. The
parameter limits the recording time if some trigging condition (fault-time) is very long
or permanently set (does not influence the Trip value recorder (TVR) function).
Operation in test mode
M12179-492 v4
If the IED is in test mode and
OpModeTest
=
Disabled
. Disturbance report function
does not save any recordings and no LED information is displayed.
If the IED is in test mode and
OpModeTest
=
Enabled
. Disturbance report function
works in normal mode and the status is indicated in the saved recording.
Post Retrigger
M12155-173 v7
Disturbance report function does not automatically respond to any new trig condition
during a recording, after all signals set as trigger signals have been reset. However,
under certain circumstances the fault condition may reoccur during the post-fault
recording, for instance by automatic reclosing to a still faulty power line.
In order to capture the new disturbance it is possible to allow retriggering (
PostRetrig
=
Enabled
) during the post-fault time. In this case a new, complete recording will
pickup and, during a period, run in parallel with the initial recording.
When the retrig parameter is disabled (
PostRetrig
=
Disabled
), a new recording will
not pickup until the post-fault (
PostFaultrecT
or
TimeLimit
) period is terminated. If a
new trig occurs during the post-fault period and lasts longer than the proceeding
recording a new complete recording will be started.
Disturbance report function can handle a maximum of 3 simultaneous disturbance
recordings.
14.6.3.2
Binary input signals
M12179-90 v9
Up to 352 binary signals can be selected among internal logical and binary input
signals. The configuration tool is used to configure the signals.
Section 14
1MRK 505 370-UUS A
Monitoring
454
Busbar protection REB670 2.2 ANSI
Application manual
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