ABB RELION 670 Series Technical Manual page 317

1MRK 502 066-UUS B
b
=
arg
ANSIEQUATION15027 V1 EN-US
where
V
AB
ANSI V1 EN-US EQUATION1790-
I
AB
ANSI V1 EN-US EQUATION1791-
1
Z
set
For Zone 1,
Z 1
=
set
IECEQUATION15011 V1 EN-US
where
R1PPZ1
X1PPZ1
For Zone 2-5 and RV
Z 1
=
set
IECEQUATION15012 V1 EN-US
where
R1Zx
X1Zx
V
pol
Operation occurs if 90°≤β≤270°
Technical manual
( )
- × -
V I Z 1 arg
AB AB set
is the voltage vector difference between phases A and B
is the current vector difference between phases A and B
is the positive sequence impedance setting for phase-to-phase fault in zone direction
R PPZ 1 1 j X PPZ 1 1
+ ⋅
is the positive sequence resistive reach for phase-to-phase fault for zone 1
is the positive sequence reactance reach for phase-to-phase fault for zone 1
R Zx 1 j X Zx 1
+ ⋅
is the positive sequence resistive reach for zone x (x=2-5 and RV)
is the positive sequence reactance reach for zone x (x=2-5 and RV)
is the polarizing voltage
( )
V
p ol
Section 7
Impedance protection
(Equation 84)
(Equation 85)
(Equation 86)
311