ABB RELION REX640 - Impedance mode Zn = Polar

X
R
Non -directional
α
α
(2
⋅
X1 zone x + X0 zone x)/3
(2
⋅ R1 zone x + R0 zone x)/3
-X1 reverse zone x
X1 zone x
* (2
⋅
X1 zone x + X0 zone x)/3
-X1 reverse zone x
X1 zone x
* (2
⋅
R1 zone x + R0 zone x)/3
Figure 544: Settings which define the line reach for phase-to-earth impedance
measuring elements if Impedance mode Zn = "Rectangular", non-directional
directionality
Impedance mode Zn = Polar
In case of phase-to-phase or three-phase impedance measuring elements, the line
reach is defined with:
• Z1 zone x (x = 1...5)
• Z1 angle zone x (x = 1...5)
In case of non-directional characteristics, the reactive reach magnitude in reverse
direction is defined with the Z1 reverse zone x (x = 1...5) setting. The characteristic
line angle, Z1 angle zone x, is the same for forward and reverse direction.
X
R
Forward
X
R
Reverse
X
R
Non-directional
Z1 angle zone x
Z1 angle zone x
Z1 angle zone x
Z1 angle zone x
Z1 reverse zone x
Z1 zone x
Z1 zone x
Z1 zone x
Figure 545: Settings which define the line reach for phase-to-phase or three-phase
impedance measuring elements if Impedance mode Zn = "Polar"
In case of phase-to-earth impedance measuring elements, the line reach is defined
with:
• Z1 zone x (x = 1...5)
1MRS759142 F
Protection functions
REX640
Technical Manual
971