Fault Records - ABB RELION 620 Series Technical Manual

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Basic functions

SG operation mode = "Logic mode 2"

The setting group 1 can be copied to any other or all groups from HMI (Copy group 1).

Fault records

The protection relay 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 (FLTRFRC) 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 pickup event of any protection function and

ends if any protection function trips or the pickup(s) is restored before the trip event. If a

pickup is restored without a trip event, the pickup duration shows the protection function

that has picked up first.

Pickup duration that has the value of 100% indicates that a protection function has tripped

during the fault and if none of the protection functions has been tripped, Pickup duration

shows always values less than 100%.

The Fault recorded data Protection and Pickup duration is from the same protection

function. The Fault recorded data trip time shows the time of the actual fault period.

The Trip time in the fault record is calculated based on the pickup and trip time stamps.

Pickup events may be delayed to avoid false positive reporting. Therefore, the Trip time

may be shorter than expected.

If some functions in relay application are sensitive to start frequently it

might be advisable to set the setting parameter Trig mode to "From trip".

Then only faults that cause an trip 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

1MAC504801-IB E

Active group

620 series ANSI

Technical Manual

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