Disturbance recorder M12179-446 v5OperationM: Analog channel M is to be recorded by the disturbance recorder (On)or not (Off).If OperationM = Off, no waveform (samples) will be recorded and reported ingraph. 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.If OperationM = On, waveform (samples) will also be recorded and reported ingraph.Setting information GUID-B0D40F6D-3CE4-4FF3-81B4-B453FDD389CB v1SetInfoInDrep: Parameter used to enable or disable the settings information indisturbance header.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 asphase angle reference for all other analog input signals. This signal will also beused for frequency measurement and the measured frequency is used whencalculating trip values. It is suggested to 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.18.6.3.5 Consideration M12179-420 v6The density of recording equipment in power systems is increasing, since thenumber of modern IEDs, where recorders are included, is increasing. This leads toa vast number of recordings at every single disturbance and a lot of information hasto be handled if the recording functions do not have proper settings. The goal is tooptimize the settings in each IED to be able to capture just valuable disturbancesand to maximize the number that is possible 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 faultgenerate a second recording (PostRetrig)?Minimize the number of recordings:Section 18 1MRK 506 369-UEN BMonitoring790 Line distance protection REL670 2.2 IECApplication manual
