Protection Scheme - Toshiba GRT100 Series Instruction Manual

6.5.3

Protection Scheme

In the protection scheme tests, a dynamic test set is required to simulate power system pre-fault,
fault and post-fault conditions.
Tripping is observed with the tripping command output relays TRIP-1 to -5.
Check that the indications and recordings are correct.
6.5.4 Metering and Recording
The metering function can be checked while testing the AC input circuit. See Section 6.4.4.
Fault recording can be checked while testing the protection schemes. Open the "Fault records"
screen and check that the descriptions are correct for the applied fault.
Recording events are listed in Table 3.4.1. The top 8 events are external events and others are
internal events. Event recording on the external events can be checked by changing the status of
binary input signals. Change the status in the same way as the binary input circuit test (see
Section 6.4.2) and check that the description displayed on the "Event Records" screen is correct.
Note: Whether to record or not can be set for each event. Change the status of the binary input signal
after confirming that the related event is set to record. (The default setting enables all the events
to be recorded.)
Some of the internal events can be checked in the protection scheme tests.
Disturbance recording can be checked while testing the protection schemes. The LCD display
only shows the date and time when a disturbance is recorded. Open the "Disturbance records"
screen and check that the descriptions are correct.
Details can be displayed on the PC. Check that the descriptions on the PC are correct. For details
on how to obtain disturbance records on the PC, see the RSM100 Manual.
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