Recording Times - ABB RELION RET670 Applications Manual

Section 18
Monitoring
18.6.3.1
18.6.3.2
890

Recording times

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
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
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.
Binary input signals
Up to 352 binary signals can be selected among internal logical and binary input
signals. The configuration tool is used to configure the signals.
1MRK 504 163-UUS A
Transformer protection RET670 2.2 ANSI
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