Setting Parameters; Operation Principle; Memory And Storage - ABB REG650 Technical Manual

1MRK 502 034-UEN -
13.11.4
13.11.5
13.11.5.1
Technical Manual

Setting parameters

See Disturbance report for settings.

Operation principle

Disturbance recording is based on the acquisition of binary and analog signals. The
binary signals can be either true binary input signals or internal logical signals
generated by the functions in the IED. The analog signals to be recorded are input
channels from the Transformer Input Module (TRM) through the Signal Matrix
Analog Input (SMAI) and possible summation (Sum3Ph) function blocks and some
internally derived analog signals.
Disturbance recorder collects analog values and binary signals continuously, in a
cyclic buffer. The pre-fault buffer operates according to the FIFO principle; old
data will continuously be overwritten as new data arrives when the buffer is full.
The size of this buffer is determined by the set pre-fault recording time.
Upon detection of a fault condition (triggering), the disturbance is time tagged and
the data storage continues in a post-fault buffer. The storage process continues as
long as the fault condition prevails - plus a certain additional time. This is called
the post-fault time and it can be set in the disturbance report.
The above mentioned two parts form a disturbance recording. The whole memory,
intended for disturbance recordings, acts as a cyclic buffer and when it is full, the
oldest recording is overwritten. The last 100 recordings are stored in the IED.
The time tagging refers to the activation of the trigger that starts the disturbance
recording. A recording can be trigged by, manual start, binary input and/or from
analog inputs (over-/underlevel trig).
A user-defined name for each of the signals can be set. These names are common
for all functions within the disturbance report functionality.

Memory and storage

The maximum number of recordings depend on each recordings
total recording time. Long recording time will reduce the number of
recordings to less than 100.
The IED flash disk should NOT be used to store any user files. This
might cause disturbance recordings to be deleted due to lack of disk
space.
When a recording is completed, a post recording processing occurs.
This post-recording processing comprises:
Section 13
Monitoring
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