When the function picks up, binary output signals PICKUP and PUDIRIN are activated. If the output
signals PICKUP and PUDIRIN remain active for the set delay
tDef
the binary output signals TRIP
and TRDIRIN get activated. The trip from this sub-function has definite time delay.
ROADir
is Relay Operating Angle.
ROADir
is identifying a window around the reference direction in
order to detect directionality. Figure
268 shows the restrictions made by the
ROADir
.
Trip area
ROADir
ANSI06000650-3-en.vsd
ANSI06000650 V3 EN-US
Figure 268: Characteristic with ROADir restriction
The function indicates forward/reverse direction to the fault. Reverse direction is defined as
3I
0
·cos (φ + 180°) ≥ the set value.
It is also possible to tilt the characteristic to compensate for current transformer angle error with
a setting
RCAComp
as shown in the Figure 269:
Section 8 1MRK 502 066-UUS B
Current protection
512
Technical manual
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