Toshiba GR200 Series Instruction Manual page 417

section2.32.6(v))
Fault determination in percentage
(ii)
Figure 2.32-7 (shaded portion c) shows the result of the fault determination in percentage. The
screen is displayed as "—" (dash sign) when the result of the fault determination has an error.
As shown in Figure 2.32-7, when the IED at local-end (IED G) runs along with the other
IEDs (IED H and IED S), user should notice that the screen difference is appeared with fault
occurrence between (1) a fault arises on the line GJ and (2) a fault arises on the line JH.
Fault A arises on the line GJ
As shown in Figure 2.32-8 (1), when a fault A arises on the line GJ, the following equation
determines the result of fault determination in percentage:
Fault determination (%) =
Fault B arises on the line JH
As shown in Figure 2.32-8 (2), when a fault B arises on the line JH, the following equation
determines the result of fault determination in percentage:
Fault determination (%) =
Fault section information
(iii)
When a junction exists on the line, and when the FL runs in the IED G at local-terminal, the
section information is useful. Figure 2.32-7 (shaded portion b) show the section information
displayed on the IED screen at the IED G when the IED H and the IED S run at remote-
terminals. Table 2.32-4 shows section notations. If a fault occurs, one of the section notations
is displayed on the IED screen. Note that no section information is shown when a junction does
not exist on the line.
Distance to fault A (GA)
lenght of Line GJ (GJ)
Distance to fault B (GB)
lenght of Line GH (GJ + JH)
- 394 -
6F2S1914 (0.49)
(2.32-24)
× 100
(2.32-25)
× 100
GRL200 (Soft 033 & 037)