Consideration - Hitachi Relion 670 Series Applications Manual

1MRK511407-UUS Rev. N
Indications
IndicationMaN: Indication mask for binary input N. If set (Show), a status change of that particular 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
OperationM: Analog channel M is to be recorded by the disturbance recorder (Enabled) or not (Disabled).
If OperationM = Disabled, 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 be used to trig
the disturbance recorder.
If OperationM = Enabled, waveform (samples) will also be recorded and reported in graph.
Setting information
SetInfoInDrep: Parameter used to enable or disable the settings information in disturbance header.
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.
16.6.4.5

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 (PostFaultrecT and TimeLimit).
• 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 (PostRetrig)?
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.
Phasor measurement unit RES670
Application manual
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Section 16
Monitoring
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