# GE L60 Instruction Manual Page 267

Line phase comparison system, ur series.

5 SETTINGS
2.
Three-reactor arrangement: three identical line reactors (X
3.
Four-reactor arrangement: three identical line reactors (X
connected between reactor-bank neutral and the ground.
X
C1
X
= the total line positive-sequence capacitive reactance
1line_capac
X
= the total line zero-sequence capacitive reactance
0line_capac
X
= the total reactor inductive reactance per phase. If identical reactors are installed at both ends of the line,
react
the inductive reactance is divided by 2 (or 3 for a three-terminal line) before inserting in the above equa-
tions. If the reactors installed at both ends of the line are different, the following equations apply:
1.
For a two-terminal line:
2.
For a three-terminal line:
X
= the total neutral reactor inductive reactance. If identical reactors are installed at both ends of the line,
react_n
the inductive reactance is divided by 2 (or 3 for a three-terminal line) before inserting in the above
equations. If the reactors installed at both ends of the line are different, the following equations apply:
1.
For a two-terminal line:
2.
For a three-terminal line:
Charging current compensation calculations should be performed for an arrangement where the VTs are con-
nected to the line side of the circuit; otherwise, opening the breaker at one end of the line will cause a calcula-
tion error. The calculated charging current per line terminal is recorded in oscillography per each phase.
NOTE
GE Multilin
X
X
1line_capac
react
------------------------------------------------
X
, X
=
C1
X
X
react
1line_capac
X
X
1line_capac
react
------------------------------------------------
, X
=
C0
X
X
react
1line_capac
X
1
=
react
X
=
react
X
=
react_n
X
react_n
L60 Line Phase Comparison System
) solidly connected phase to ground.
react
X
X
0line_capac
react
------------------------------------------------
=
C0
X
X
react
0line_capac
) wye-connected with the fourth reactor (X
react
(
X
X
+ X
3
0line_capac
react
react_n
-------------------------------------------------------------------------------- -
=
X
+ X
3
X
react
react_n
0line_capac
1
1
---------------------------------- -
---------------------------------- -
+
X
X
react_terminal1
react_terminal2
1
1
---------------------------------- -
---------------------------------- -
1
+
X
X
react_terminal1
react_terminal2
1
--------------------------------------- -
--------------------------------------- -
1
+
X
X
react_n_terminal1
react_n_terminal2
1
--------------------------------------- -
------------------------------------------
1
=
+
X
X
react_n_terminal1
react__n_terminal2
5.5 GROUPED ELEMENTS
(EQ 5.8)
react_n
)
(EQ 5.9)
1
---------------------------------- -
+
X
react_terminal3
1
1
1
--------------------------------------- -
+
X
react_n_terminal3
5-129
)
5  