ANSI09000684 V1 EN-US
Figure 261: Simplified logic diagram for negative sequence overcurrent stage x , where x=1, 2, 3 or 4
NS4PTOC (4612) can be completely blocked from the binary input BLOCK. The pickup signals from
NS4PTOC (4612) for each stage can be blocked from the binary input BLKx. The trip signals from
NS4PTOC (4612) can be blocked from the binary input BLKTR.
8.5.7.6 Directional supervision element with integrated directional comparison
function
GUID-F54E21F7-7C99-41D6-BEC6-2D6EC6D2B2A3 v3
At least one of the four negative sequence overcurrent steps must be set as
directional in order to enable execution of the directional supervision element and
the integrated directional comparison function.
The operating and polarizing quantity are then used inside the directional element, as shown in
figure 262, to determine the direction of the fault.
1MRK 502 066-UUS B Section 8
Current protection
501
Technical manual
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