ABB Relion 670 Series Applications Manual page 445

1MRK 511 358-UUS A
OperationM = Disabled , no waveform (samples) will be recorded and reported in graph.
If
However, Trip value, pre-fault and fault value will be recorded and reported. The input channel can
still be used to trig the disturbance recorder.
OperationM = Enabled , waveform (samples) will also be recorded and reported in graph.
If
Event recorder
Event recorder (ER) function has no dedicated parameters.
Trip value recorder
ZeroAngleRef : The parameter defines which analog signal that will be used as phase angle
reference for all other analog input signals. This signal will also be used for frequency
measurement and the measured frequency is used when calculating trip values. It is suggested to
point out a sampled voltage input signal, for example, a line or busbar phase voltage (channel
1-30).
Sequential of events
function has no dedicated parameters.
16.6.3.5 Consideration
The density of recording equipment in power systems is increasing, since the number of modern
IEDs, where recorders are included, is increasing. This leads to a vast number of recordings at
every single disturbance and a lot of information has to be handled if the recording functions do
not have proper settings. The goal is to optimize the settings in each IED to be able to capture just
valuable disturbances and to maximize the number that is possible to save in the IED.
The recording time should not be longer than necessary (
• Should the function record faults only for the protected object or cover more?
• How long is the longest expected fault clearing time?
• Is it necessary to include reclosure in the recording or should a persistent fault generate a
second recording (
Minimize the number of recordings:
• Binary signals: Use only relevant signals to start the recording that is, protection trip, carrier
receive and/or pickup signals.
• Analog signals: The level triggering should be used with great care, since unfortunate settings
will cause enormously number of recordings. If nevertheless analog input triggering is used,
chose settings by a sufficient margin from normal operation values. Phase voltages are not
recommended for trigging.
Remember that values of parameters set elsewhere are linked to the information on a report. Such
parameters are, for example, station and object identifiers, CT and VT ratios.
16.7 Logical signal status report BINSTATREP
Application manual
PostRetrig )?
PostFaultrecT and TimeLimit ).
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Section 16
Monitoring
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