Toshiba GR-200 Series Instruction Manual page 603

possible when an error is detected during the IED operations.
Double command block
(v)
For controlling, there is a principle that a first receiving-command shall be carried out
primarily. In other words, succeeding receiving-commands cannot have the right to run until
the first receiving-command is not completed to operate (that is, the principle of double
command blocking (DCB) is established). The principle is significant for the device protections;
hence, the user should DCB setting. For more information with regard to set the DCB, see
General control function: Common controls
Chapter
Monitoring tools
The user can monitor status and measurement value obtained in the IED using the monitoring
tools. All signals monitored are tabulated in the monitoring list dialog. When the user wishes
to monitor a signal, select a signal in the monitoring list dialog after the operation of the drag-
drop on the monitoring window. The monitoring tools can generate an exporting layout file in
the CSV; it also can obtain the layout file in the CSV.
Record tools
Fault record
(i)
Fault records are including measuring information before and after the occurrence of the faults.
Accordingly, the user can see information before the fault so that the user can analyze the fault
more precisely. The user can select a fault from the recorded lists; the user can save it into the
fault information file in the CSV. The user can also view the fault records when the exported
data file in the CSV are retrieved into the IED.
Disturbance record
(ii)
Disturbance record is a kind of module information measured so that the user can see them in
several graphs: an oscilloscope chart, a harmonic graph, a 3D harmonic graph, a vector in relay
operation analysis (ROA) chart. The user can see disturbance records when the disturbance
records file in COMTRADE are provided. The user can also save disturbance records into the
COMTRADE file.
Event list
(iii)
The event list is recorded events information in the IED. The user can generate events
information file in the CSV; the user can retrieve events data file into the IED to view when
the file is in the CSV.
Note: In the IED the date and time is clocked in the coordinated universal time (UTC)
when the clock is selected to operate in UTC. In the record tools within the PC the
(→p. 414).
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6F2T0200 (0.15)
GRE200 (1,2)