Toshiba GR200 Series Instruction Manual page 407

Trigger signal for data recording
Figure 2.32-3 shows a trigger signal for data recording. If elements operate and switches are
closed, the FL records the data of current and voltage. It is also possible that the FL starts to
record these data when the PLC
Operation signal from DIFL
Operation signal from RDIF
Operation signal from DIFG
Operation signal from RDIFG
310022EC64 FLAZ_RecF
Figure 2.32-3 Data recording trigger from the DIFL and the PLC
Note: User can configure a signal with the PLC logic. For more information on the PLC,
1
see Chapter
Note: Respective switches in the above figure are closed when respective elements
2
operate. After that, data recording is provided for the FL. Elements and
characteristics (DIFL, RDIF, DIFG, and RDIFG) are discussed in the DIFL. See
Chapter
Trigger signal for FL calculation
Figure 2.32-4 shows a calculation trigger; the calculation is carried out when the FL receives
the result signals of the DIFL and the DIFG. The calculation also starts by the PLC signal.
Result signal from DIFL
Result signal from DIFG
310022EC66
Figure 2.32-4 Calculation trigger from the DIF function and PLC
Calculation error
(iii)
User should note that the calculation error might be larger when a setting value is far from
the actual data of line impedance. For example, if abnormal settings
error will be appeared notably.
Note: Abnormal settings can be exist when values are far from actual impedance data of
1
transmission line. For example, resistance value is so larger then reactance value,
signal is appeared.
1
element
2
2 element
element
2
2 element
PLC function
.
Relay application: Segregated current differential protection
FLAZ_LocF
- 384 -
6F2S1914 (0.49)
Trigger signal for data recording:
Current and voltage data are saved
by the operation signals from
elements.
Trigger signal for calculation:
Calculation of fault locator is
initiated by the DIFL or the DIFG.
are done, the calculation
1
GRL200 (Soft 033 & 037)
.