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Disturbance recorder
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Use the disturbance recorder to achieve a better understanding of the behavior of the
power network and related primary and secondary equipment during and after a distur-
bance. An analysis of the recorded data provides valuable information that can be used
to improve existing equipment. This information can also be used when planning for
and designing new installations.
The disturbance recording function in the REx 5xx terminals is characterized by great
flexibility as far as starting conditions and recording times, and large storage capacity
are concerned. Thus, the disturbance recorders are not dependent on the operation of
protective functions, and they can record disturbances that were not discovered by pro-
tective functions for one reason or another.
The disturbance recording function in the REx 5xx terminals is fully adequate for the
recording of disturbances for the protected object.
Use available software tools to retrieve the recordings and the evaluation software RE-
VAL to analyze, evaluate and print recordings.
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Disturbance recording is based on the continuous collection of network data, analog
values and binary signals, in a cyclic buffer. The buffer operates according to the FIFO
principle, old data will 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.
(Store recording,active triggers must reset)
Pre-fault
(New recording started)
tPost or
tLim
(Store recording)
tLim
Fault
trig-on
trig-off
(All triggers)
trig-on
(New recording started,
Store previous recording)
Post-fault
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