GUID-347973B8-AB04-40ED-B985-3F36A6305066 V1 EN
Figure 100: Functional module diagram
.
Directional calculation
The directional calculation compares the current phasors to the polarizing phasor.
A suitable polarization quantity can be selected from the different polarization
quantities, which are the positive-sequence voltage, negative-sequence voltage, self-
polarizing (faulted) voltage and cross-polarizing voltages (healthy voltages). The
polarizing method is defined with the Pol quantity setting.
Table 212: Polarizing quantities
Polarizing quantity
Description
Pos. seq. volt Positive-sequence voltage
Neg. seq. volt Negative-sequence voltage
Self pol Self-polarization
Cross pol Cross-polarization
The directional operation can be selected with the Directional mode setting. Either
"Non-directional", "Forward" or "Reverse" operation can be selected. By setting
the value of Allow Non Dir to "True", the non-directional operation is allowed
when the directional information is invalid.
Section 4 1YHT530004D05 D
Protection functions
202 615 series
Technical Manual
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