The setting group 1 can be copied to any other or all groups from HMI (Copy
group 1).
3.7 Fault records
The IED has the capacity to store the records of 128 latest fault events. Fault
records include fundamental or RMS current values. The records enable the user to
analyze recent power system events. Each fault record (FLTMSTA) is marked with
an up-counting fault number and a time stamp that is taken from the beginning of
the fault.
The fault recording period begins from the start event of any protection function
and ends if any protection function trips or the start is restored before the operate
event. If a start is restored without an operate event, the start duration shows the
protection function that has started first.
Start duration that has the value of 100% indicates that a protection function has
operated during the fault and if none of the protection functions has been operated,
Start duration shows always values less than 100%.
The Fault recorded data Protection and Start duration is from the same protection
function. The Fault recorded data operate time shows the time of the actual fault
period. This value is the time difference between the activation of the internal start
and operate signals. The actual operate time also includes the starting time and the
delay of the output relay.
If some functions in relay application are sensitive to start
frequently it might be advisable to set the setting parameter Trig
mode to “From operate”. Then only faults that cause an operate
event trigger a new fault recording.
The fault-related current, voltage, frequency, angle values, shot pointer and the
active setting group number are taken from the moment of the operate event, or
from the beginning of the fault if only a start event occurs during the fault. The
maximum current value collects the maximum fault currents during the fault. In
case frequency cannot be measured, nominal frequency is used for frequency and
zero for Frequency gradient and validity is set accordingly.
Measuring mode for phase current and residual current values can be selected with
the Measurement mode setting parameter.
1YHT530004D05 D Section 3
Basic functions
615 series 73
Technical Manual
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