ABB Relion 670 series - Page 200

ABB Relion 670 series

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ANSI99000557-1-en.vsd

AB

BC

CA

AND

AND

AND

AND

AND

AND

AG

BG

CG

PHSEL

NDIR_AB

NDIR_BC

NDIR_CA

NDIR_A

NDIR_B

NDIR_C

PUZMPP

STNDPE

AND

BLOCK

LOVBZ

PHPUND

BLK

OR

OR

OR

OR

BLOCFUNC

ANSI99000557 V2 EN-US

Figure 77: Conditioning by a group functional input signal PHSEL, external start condition

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 78: 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.

Section 7 1MRK 502 066-UUS B

Impedance protection

194

Technical manual

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