ABB REG670 Applications Manual page 217

1MRK 502 071-UEN -
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual
These settings, two per zone (x=1,2..5&RV), with options {Off, Quadrilateral, Mho,
Offset}, are used to set the operation and characteristic for phase-to-earth and phase-
to-phase faults, respectively.
For example, in one zone it is possible to choose Mho characteristic for the three Ph-
Ph measuring loops and Quadrilateral characteristic for the three Ph-E measuring
loops.
DirModeZx
This setting defines the operating direction for zones Z3, Z4 and Z5 (the directionality
of zones Z1, Z2 and ZRV is fixed). The options are Non-directional, Forward or
Reverse. The result from respective set value is illustrated in figure93, where the
positive impedance corresponds to the direction out on the protected line.
X
Non-directional
IEC05000182 V2 EN
Figure 93: Directional operating modes of the distance measuring zones 3 to 5
tPPZx, tPEZx, TimerModeZx, ZoneLinkStart and TimerLinksZx
The logic for the linking of the timer settings can be described with a module diagram.
The figure 94 shows only the case when TimerModeZx is selected to Ph-Ph and Ph-E.
X
R
Forward
Section 8
Impedance protection
X
R
Reverse
IEC05000182-2-en.vsdx
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