Instruction manual
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AQ G3x7 Generator protection IED
176 (211
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Figure 3-108: Example sag and swell events.
Table 3-82 Setting parameters of the current transformer supervision function
Parameter
Setting value, range
and step
Description
Operation
On
Off
Operating mode selection for the function. Operation can be
either disabled “Off” or
enabled “ON”.
Default setting is enabled.
IPhase Diff
50…90 % by step of
1 %
Phase current difference setting. Default setting is 80 %.
Time delay
100…
60000ms
CT supervision time delay. Default setting is 1000ms.
3.3.7
D
ISTURBANCE RECORDER
The disturbance recorder function can record analog signals and binary status signals.
These signals are user configurable. The disturbance recorder function has a binary input
signal, which serves the purpose of starting the function. The conditions of starting are
defined by the user. The disturbance recorder function keeps on recording during the active
state of this signal but the total recording time is limited by the timer parameter setting. The
pre-fault time, max-fault time and post-fault time can be defined by parameters.
If the conditions defined by the user - using the graphic equation editor
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are satisfied, then
the disturbance recorder starts recording the sampled values of configured analog signals
and binary signals. The analog signals can be sampled values (voltages and currents)
received via input modules or they can be calculated analog values (such as negative