ABB Relion 670 Series Technical Reference Manual page 341

Line differential protection ansi

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1MRK505222-UUS C

Technical reference manual

ANSI10000099 V1 EN

Difference in operating characteristic depending on operation mode

when load encroachment is activated

When FRPSPDIS (21) is set to operate together with a distance measuring zone the

resultant operate characteristic could look like in figure 107. The figure shows a

distance measuring zone operating in forward direction. Thus, the operating area of the

zone together with the load encroachment is highlighted in black.

Impedance protection

ANSI10000099-1-en.vsd

Relion red670