GUID-89207322-ADEC-4927-9402-72C112CC7C7C V2 EN
Figure 99:
Functional module diagram
The module diagram illustrates all the phases of the function. Functionality for phases
A, B and C is identical.
All three phases have independent settings.
Level detector
The module compares differential currents
I_A
calculated by the peak-to-peak
measurement mode to the set
Operate value
. The Timer module is activated if the
differential current exceeds the value of the
Operate value
setting.
Timer
Once activated, Timer activates the
START
output. The time characteristic is
according to DT. When the operation timer reaches the value set by
Minimum operate
time
, the
OPERATE
output is activated. If the fault disappears before the module
operates, the reset timer is activated. If the reset timer reaches the value set by
Reset
delay time
, the operation timer resets and the
START
output is deactivated.
Section 4
1MRS757454 D
Protection functions
214
611 series
Technical Manual
Summary of Contents for Relion 611 Series
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