ABB Relion 670 Series Technical Reference Manual page 214

Section 6
Impedance protection
208
PHSEL
AND
AB
AND
BC
AND
CA
AND
AG
AND
BG
AND
CG
LOVBZ
OR
BLOCK
ANSI99000557 V2 EN
Figure 94: Conditioning by a group functional input signal PHSEL
Composition of the phase pickup signals for a case, when the zone operates in a non-
directional mode, is presented in figure 95.
OR
OR
OR
BLOCFUNC
1MRK505222-UUS C
PUZMPP
NDIR_AB
NDIR_BC
NDIR_CA
NDIR_A
NDIR_B
NDIR_C
STNDPE
PHPUND
AND
BLK
ANSI99000557-1-en.vsd
Technical reference manual