ABB REL670 2.2 IEC Applications Manual page 321

1MRK 506 369-UEN B
Line distance protection REL670 2.2 IEC
Application manual
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STCNDZ
IEC10000099 V1 EN-US
Figure 159: Operating characteristic when load encroachment is activated
When the "phase selection" is set to operate together with a distance measuring
zone the resultant operate characteristic could look something like in figure 160.
The figure shows a distance measuring zone operating in forward direction. Thus,
the operating area of the zone together with the load encroachment area is
highlighted in black.
Impedance protection
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Section 8
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STCNDLE
IEC10000099-1-
en.vsd
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