GE Multilin L60 Line Phase Comparison System 5-1295 SETTINGS 5.5 GROUPED ELEMENTS52. Three-reactor arrangement: three identical line reactors (Xreact ) solidly connected phase to ground.(EQ 5.8)3. Four-reactor arrangement: three identical line reactors (Xreact) wye-connected with the fourth reactor (Xreact_n)connected between reactor-bank neutral and the ground.(EQ 5.9)X1line_capac = the total line positive-sequence capacitive reactanceX0line_capac = the total line zero-sequence capacitive reactanceXreact = the total reactor inductive reactance per phase. If identical reactors are installed at both ends of the line,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:Xreact_n = the total neutral reactor inductive reactance. If identical reactors are installed at both ends of the line,the inductive reactance is divided by 2 (or 3 for a three-terminal line) before inserting in the aboveequations. 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.X C1X1line_capac Xreact⋅Xreact X1line_capac–------------------------------------------------= , X C0X0line_capac Xreact⋅Xreact X0line_capac–------------------------------------------------=X C1X1line_capac Xreact⋅Xreact X1line_capac–------------------------------------------------= , X C0X0line_capac Xreact 3+ Xreact_n( )⋅Xreact 3+ Xreact_n X0line_capac–---------------------------------------------------------------------------------=Xreact 1 1Xreact_terminal1----------------------------------- 1Xreact_terminal2-----------------------------------+ ⁄=Xreact 1 1Xreact_terminal1----------------------------------- 1Xreact_terminal2----------------------------------- 1Xreact_terminal3-----------------------------------+ + ⁄=Xreact_n 1 1Xreact_n_terminal1---------------------------------------- 1Xreact_n_terminal2----------------------------------------+ ⁄=Xreact_n 1 1Xreact_n_terminal1---------------------------------------- 1Xreact__n_terminal2------------------------------------------ 1Xreact_n_terminal3----------------------------------------+ + ⁄=NOTE
