Recording Times - Hitachi Relion 670 Series Applications Manual

1MRK511407-UUS Rev. N
Operation
The operation of Disturbance report function DRPRDRE has to be set Enabled or Disabled. If Disabled is
selected, note that no disturbance report is registered, and none sub-function will operate (the only
general parameter that influences Sequential of events (SOE)).
Operation = Disabled:
• Disturbance reports are not stored.
• LED information (yellow - pickup, red - trip) is not stored or changed.
Operation = Enabled:
• Disturbance reports are stored, disturbance data can be read from the local HMI and from a PC for
example using PCM600.
• LED information (yellow - pickup, red - trip) is stored.
Every recording will get a number (0 to 999) which is used as identifier (local HMI, disturbance handling
tool and IEC 61850). An alternative recording identification is date, time and sequence number. The
sequence number is automatically increased by one for each new recording and is reset to zero at
midnight. The maximum number of recordings stored in the IED is 200. The oldest recording will be
overwritten when a new recording arrives (FIFO).
16.6.4.1

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.
Phasor measurement unit RES670
Application manual
To be able to delete disturbance records, Operation parameter has to be Enabled.
The IED flash disk should not be used to store any user files. This causes lack of space for
new disturbance recordings.
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Section 16
Monitoring
M12179-82 v9
M12179-88 v6
M12179-492 v4
M12155-173 v7
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