Technical description
2 Protection functions
2.4 Distance protection Z<
VM259.EN007
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Characteristic type 2.
In the characteristic type 2 the line angle is set to 90 degrees.
The reactive setting X is set above the resistive setting R. The
resistive reach is equal at the both sides of the line setting. The
load setting R and the angle setting of load block can be found
from ―distance common settings‖ menu. These values are being
used only if the ―Load block in use‖ is selected as ―Yes‖. The
tolerance of inaccuracy is now taken from the X setting. This is
because the X value is greater than the R value. If the allowed
inaccuracy is for example 5 % and X setting is 10 Ω the allowed
tolerance would be 0.5 Ω.