Δφ Stage
Description
Logic
[lo_DeltaPhi_Stage, 1, en_US]
Figure 6-226
Logic Diagram of the Δφ Stage
In the logic diagram, the I1 < Release stage is instantiated. You can find more information in chapter
6.36.5.1 Description.
If the I1 < Release stage is not instantiated, the AND operation has no influence. The
Operate
indication is
issued under the following conditions:
•
The parameter Operate & flt.rec. blocked is set to no.
•
The operate delay expires.
•
The phase-angle differential exceeds the parameter Threshold Δφ.
Measurand
The Δφ stage gets the measured value
Δφ
from the general functionality.
Pickup
The Δφ stage compares the value of the vector jump
Δφ
with the Threshold Δφ.
If the value of the Threshold Δφ is exceeded, the pickup delay starts.
6.36.4
6.36.4.1
Protection and Automation Functions
6.36 Vector-Jump Protection
SIPROTEC 5, Overcurrent Protection, Manual 795
C53000-G5040-C017-8, Edition 07.2017
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