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The parameter Disp.Volt. from from can be used to select whether to evaluate the measured voltage VN
or Vx or the calculated quantity 3V0.
If you want to use Vx, connect the displacement voltage to voltage input Vx.
Independent Displacement Voltage Protection
The independent displacement voltage protection allows you to achieve time-graded tripping via separately
settable trip delay times of the two elements.
When one of the settable thresholds has been exceeded, the element picks up and trips after a settable time
delay has elapsed.
The dropout ratio for both elements (= V
The following logic diagram shows the function of the independent displacement voltage protection.
[logik_59n-dt-funk-14012013, 1, en_US]
Figure 2-52
Dependent Displacement Voltage Protection
For the dependent displacement voltage protection, pickup stabilization is accomplished via settable dropout
times.
Pickup threshold and dropout ratio can be set.
The following logic diagram shows the function of the dependent displacement voltage protection.
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
dropout
Independent Displacement Voltage Protection
/V
) can be set.
pickup
Functions
2.6 Voltage Protection 27, 59
193
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