GE LPS-O Instruction Manual page 184

8.1 INTRODUCTION 8 LOCAL USER INTERFACE
The factory test case is a phase to phase fault at 50% of the line determined by the default factory settings,
except for the configurable outputs which are all assigned a value of 0 (no assignment). The contact converters
will respond to the levels in the uploaded file. After the response described above, playback is started and the
word ON will be displayed on the top line. The cursor will be positioned on the top line. After the playback is
over, the word ON is removed.
If the second choice, Uploaded data, is selected, a check is made to verify whether any uploaded oscillogra-
phy data exists in the relay. If the data does not exist, an error message is displayed. If the data exists, the user
is asked to select the settings to be used during playback, as explained for the item Factory test case. An
oscillography file may be uploaded by using LPSO-Link (refer to Chapter 11: LPSO-LINK USER GUIDE). The
playback is started after all prompts are answered. The word ON will be displayed as long as playback lasts.
The only data files that can be uploaded to the relay are OSC files downloaded from another LPS-O, LPS-D, or
ALPS model relay, or a binary or ASCII Commtrade file from another source (Commtrade details are explained
below). These files contain the analog data, flags and settings to be uploaded to the relay.
Any file that meets the Commtrade format may be downloaded to the relay after it has been converted to OSC
format using the CTRD2OSC.exe program provided with the LPS-O software suite. It will be installed into the
same directory as LPSO-Link. This utility converts only the analog data from the file; all flag values are set to 0,
and default settings will be added to the file. View the CTRD2OSC.TXT text file for complete instructions on
using the conversion utility. The only data used from a Commtrade file is the analog channel data. All other
data are discarded and replaced with dummy values. The data must be sampled at a rate of 64 samples per
power cycle or 3840 samples/second at 60 Hz.
The values of the oscillography setting are obtained from the current settings, not the ones in the playback
fault. Therefore, the new fault report will correspond to the current settings. For example, if the playback fault
has 36 cycles of data, but the current NUMFAULT is set to 8, only 18 cycles of data will appear in the new fault
report. Conversely, if the playback fault has only 12 cycles of data and the current setting will generate 36
cycles, then 24 cycles of zero data will be processed at the end of playback.
If the third choice, Data in relay, is selected, the user is asked to select the settings (current/fault) for playback.
After the settings have been selected, the summary of faults to be selected is displayed. If fault settings is
selected, the settings active at the time of the fault will be used. The settings file is attached to the oscillogra-
phy and is always saved with the oscillography data.
The cursor will be located on the second line. To move cursor to an item, use the arrow keys or enter the fault
number followed by the [ENT] key. If entering a number, the digits pressed are echoed at the top right corner of
the display. Pressing the [ENT] key after moving the cursor to the desired item starts playback. The top line
changes to indicate that playback has started. The word ON will be removed from the display as soon as the
playback is complete.
Two checks are made before starting playback: the privilege level must be MASTER and communications
must not be in the process of performing an action. If either of these checks fails, an error message is dis-
played to the user and the test is canceled.
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If End Playback is chosen and the outputs are disabled, the relay prompts with the dialogue:
Enable Outputs?
If YES is chosen, the outputs are enabled, the status LED turns GREEN (if playback test was the only reason
to turn it RED), and the ACT command category selection is displayed. If NO is chosen, the outputs remain dis-
abled, the status LED remains RED, and the ACT command category selection is displayed.
8- LPS-O Line Protection System GE Power Management
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