ABB Relion 670 series - Page 276

ABB Relion 670 series

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Composition of the phase pickup signals for a case, when the zone operates in a non-directional

mode, is presented in figure 78.

ANSI09000889-1-en.vsd

NDIR_A

NDIR_B

NIDR_C

NDIR_AB

NDIR_BC

NDIR_CA

OR

OR

OR

OR

AND

AND

AND

AND

BLK

PICKUP

PU_C

PU_B

PU_A

15ms

0

15ms

0

15ms

0

15ms

0

ANSI09000889 V1 EN-US

Figure 129: Composition of pickup signals in non-directional operating mode

Results of the directional measurement enter the logic circuits, when the zone operates in

directional (forward or reverse) mode, as shown in figure 79.

NDIR_A

DIR_A

NDIR_B

DIR_B

NDIR_C

DIR_C

NDIR_AB

DIR_AB

NDIR_BC

DIR_BC

NDIR_CA

DIR_CA

AND

AND

AND

AND

BLK

15 ms

0

15 ms

0

PU_ZMPG

PU_A

PU_B

PU_C

PICKUP

PU_ZMPP

AND

AND

AND

AND

AND

AND

OR

OR

OR

OR

OR

OR

ANSI09000888-2-en.vsd

15 ms

0

15 ms

0

ANSI09000888 V2 EN-US

Figure 130: Composition of pickup signals in directional operating mode

Tripping conditions for the distance protection zone one are symbolically presented in figure 80.

Section 7 1MRK 502 066-UUS B

Impedance protection

270

Technical manual

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