IfOperationM =On, waveform (samples) will also be recorded and reported in graph.NomValueM: Nominal value for input M.OverTrigOpM,UnderTrigOpM: Over or Under trig operation, Disturbance report may trig forhigh/low level of analog input M (On) or not (Off).OverTrigLeM,UnderTrigLeM: Over or under trig level, Trig high/low level relative nominal valuefor analog input M in percent of nominal value.16.6.3.4 Sub-function parameters M12179-389 v3All functions are in operation as long as Disturbance report is in operation.Indications M12179-448 v4IndicationMaN: Indication mask for binary input N. If set (Show), a status change of thatparticular input, will be fetched and shown in the disturbance summary on local HMI. If not set(Hide), status change will not be indicated.SetLEDN: Set red LED on local HMI in front of the IED if binary input N changes status.Disturbance recorder M12179-446 v4OperationM: Analog channel M is to be recorded by the disturbance recorder (On) or not (Off).IfOperationM =Off, no waveform (samples) will be recorded and reported in graph. However,Trip value, pre-fault and fault value will be recorded and reported. The input channel can still beused to trig the disturbance recorder.IfOperationM =On, waveform (samples) will also be recorded and reported in graph.Event recorder M12179-444 v4Event recorder (ER) function has no dedicated parameters.Trip value recorder M12179-442 v3ZeroAngleRef: The parameter defines which analog signal that will be used as phase anglereference for all other analog input signals. This signal will also be used for frequencymeasurement and the measured frequency is used when calculating trip values. It is suggestedto point out a sampled voltage input signal, for example, a line or busbar phase voltage(channel 1-30).Event list M12179-440 v3Event list (EL) (SOE) function has no dedicated parameters.16.6.3.5 Consideration M12179-420 v5The density of recording equipment in power systems is increasing, since the number ofmodern IEDs, where recorders are included, is increasing. This leads to a vast number ofrecordings at every single disturbance and a lot of information has to be handled if therecording functions do not have proper settings. The goal is to optimize the settings in eachIED to be able to capture just valuable disturbances and to maximize the number that ispossible to save in the IED.The recording time should not be longer than necessary (PostFaultrecT andTimeLimit).• 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 asecond recording (PostRetrig)?1MRK 511 358-UEN A Section 16Monitoring395Application manual
