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LPS-O Line Protection System GE Power Management
8.1 INTRODUCTION 8 LOCAL USER INTERFACE
8
A test is selected using the arrow keys followed by the [ENT] key.
If
Display
is chosen, the top two lines of the display will be filled to verify that all LCD dots are working. The
display will prompt the user to press the [ENT] key. The bottom two lines of the display will now be filled. This is
the end of the test. If the [CLR] key is pressed the relay screen is displayed. If the [ACT] key is pressed, the LUI
TEST choices screen will be displayed.
If
LEDs
is chosen, both the STATUS and TRIP LEDs will be tested. The STATUS LED is tested first followed by
the TRIP LED. The display will indicate the correct state of the LEDs. After each LED state the user will be
prompted to press the [ENT] key and move to the next test. When the [ENT] key is pressed after the last test,
the LEDs return to their pre-test state and the
LUI TEST
item menu is displayed.
If
Keypad
is chosen, the following screen appears:
When any key is pressed, the key label will blink on the display. If another key is pressed, the new key label will
blink. Pressing the [CLR] key will terminate the keypad test and the test item menu is displayed.
8.1.18 DIGITAL OUTPUT TEST
This command tests the digital outputs of the relay. If the digital outputs are not enabled, the user is prompted
to enable them. If the user enters [1/Y] (YES) and presses [ENT], the outputs are enabled. If the user presses
[3/N] (NO),
CANCELED
is displayed and the test is terminated.
When the outputs are enabled, protection must be disabled (if it is currently enabled). If the user responds NO,
CANCELED
is displayed and the test is canceled. If user responds YES, protection is turned OFF, the status
LED turns RED and the list of available tests is displayed.
To select a test item, scroll through the list using arrow keys or enter the test number. If the test pre-requisites
are satisfied, the word
ON
will display to the right of test item. If the password privilege level is not MASTER or
communications is performing an action, an error message is displayed and the test is not performed.
The contact being tested will close if it is normally open and it will open if it is normally closed. Only one output
can be monitored at a time. When a new output is tested, the old output will be reset and the new output will
either open or close.
Other activities using the [SET], [ACT] or [INF] keys may be performed at any time. When the user returns to
the Digital Output tests, they are asked questions about Protection enable and then the selected test and its
following tests are displayed, starting from the second line.
Press the arrow keys until
End Test Mode
is displayed or press the [1], [ENT] keys to stop the digital output
test. Press [ENT] again. The digital output test is terminated and the following message will be displayed:
The cursor will be stationed on the third line. If [1/Y] (YES), [ENT] is entered, protection is turned ON. The LED
indicating LPS-O status turns GREEN (if performing digital output test was the only cause for it being RED)
and the ACT command menu is displayed with the cursor positioned on
Dig output test
. The above prompt
will be also displayed when the user tries to exit the digital output test category without ending the test.
SET 1/Y 2 3/N CLR
INF 4 5 6 UP
ACT 7 8 9 DN
END INV 0. ENT
DO TEST
Enable Protection?
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