ABB RELION 620 Series Technical Manual page 793

1MAC504801-IB E
620 series ANSI
Technical Manual
I = I + k I ZL − ZL
* * * (
rly rly 0 Zero
GUID-DC024A67-96A6-42A0-A9CC-1D814F9CA607 V1 EN
where
I ( _ I A I B I C _ _ ) / 3
0
= + +
GUID-522CAF08-239C-4194-89BD-FC39A043568D V1 EN
k
ZL and ZL
pos zero
ZL
pos
ZL
zero
RL
pos
XL
pos
RL
zero
XL
zero
I*
rly
I
rly
R1 is positive-sequence line resistance in ohm/(miles or Kms) and is provided as a setting
X1 is positive-sequence line reactance in ohm/(miles or Kms) and is provided as a setting
R0 is zero-sequence line resistance in ohm/(miles or Kms) and is provided as a setting
X0 is zero-sequence line reactance in ohm/(miles or Kms) and is provided as a setting
Line Length is the length of the line in the units of Km (kilometers) or miles and is provided
as a setting.
If R1, X1, R0, X0 are given in ohm/mile, the length of the line Line Length should be given
in the unit of miles
If R1, X1, R0, X0 are given in ohm/Km, the length of the lineLine Length should be given
in the unit of Km.
Table 569 describes what are the voltage phasor and current phasor under different fault
types.
ZL
) /
Pos Pos
1.0 (scaling factor)
refer to positive and zero-sequence line impedances.
RL + j*XL
pos pos
RL + j*XL
zero zero
PosSeqR * LinLen
PosSeqX * LinLen
ZeroSeqR * LinLen
ZeroSeqX * LinLen
Ground-compensated phase current
Non-compensated phase current
Section 10
Recording functions
(Equation 104)
(Equation 105)
787