Overcurrent Relay Testing; Introduction - ISA T1000 PLUS User Manual

DOC. MIE91093
 Don't save;
 Automatic at trip;
 Confirm at trip;
 Manual.
With the selection Automatic at trip, data are immediately
saved as soon as the relay trips: this is to be selected when a
series of ON+TIME tests are performed.
With the selection Confirm at trip, as soon as the relay trips it
is possible to save data pressing MENU and then Yes: this is to
be selected when you are adjusting parameters and you want
to be sure to save the correct data. Save is performed both in
ON mode and in ON+TIME mode.
With the selection Manual, it is possible to save data at any
time, pressing MENU and then Yes, even if the relay did not
trip. As already explained, a threshold is verified with two
tests: with a value the relay trips, with a slightly different
value the relay does not trip. This is to be selected when you
are looking for the no-trip limit of a threshold.
Once results are saved, it is possible to review or to delete
them with the command Results > Show results. The
display shows the list of the relay serial numbers, followed by
the number of tests performed with the same header.
Pressing on the relay serial number you access a window with:
Plant name, Serial number, operator. You can: return, delete
escape. Pressing Delete, a confirmation message is displayed.
Pressing Yes, all results are deleted; pressing No, you return
to the results list.
If you go to the number of tests and press, tests are shown
one after the other, as they have been recorded. Here you can
read the results, and delete the ones that you want, after
confirmation.
1.1 O
VERCURRENT RELAY TESTING

1.1.1. Introduction

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