10
Operator overview
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If a disturbance occurs the operator has a possibility to document it so that the fault that
caused the disturbance can be analyzed, evaluated and documented for future reference.
The operator can identify the disturbance and, for example, document the fault currents
and voltages at the time of the fault. The operator also has a possibility to retrieve data
about the protected object, which will give further information when analyzing a fault.
This implies viewing the mean current, voltage, power and frequency or primary and
secondary measured phasors. The operator can check the terminal status at any time.
In some cases the operator needs to change the way the terminal operates. This could
be changing the active setting group or a setting parameter value. This must be done in
strict accordance with the company regulations due to that a non-authorized change can
cause severe damage to the protected object if a fault is not properly disconnected.
