GE MLJ1000, Manual

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GEK - 105560
23
6. OPERATION OF MLJ (KEYPAD AND DISPLAY)
The MLJ is operated by means of three push-buttons located on the front. These buttons are lined up
vertically and, from top to bottom; they are “ENTER”, “+”, and “–”.
The first button is indicated with an arrow (see figure 2), although throughout this manual it is referred
to as ENTER. With the cover on, only this button can be accessed using a push button.
The relay supplies information by means of three displays of seven segments and using three LEDs,
all of which are located on the front. The LEDs are lined up vertically and are marked, from top to
bottom: “READY”, “52”, and “27”.
The MLJ can be set in one of the three following conditions:
•
Readout Sequence: supplies information about the state of the relay, voltage values, frequency
slip, registers of the last close enable, etc. To operate, simply push the ENTER button.
•
Setting Sequence: allows consulting and changing of the operation settings of the MLJ. All three
buttons are used for this operation.
•
Calibration Sequence: this function gives the average of the line and bus voltages, to assist in
calibration.
Immediately after connecting the relay, it carries out a self-check test and the letters tSt appear. Upon
completion of the self-check test, the relay becomes operative, in Readout Sequence, with the state of
the line and bus shown on the display (live or dead).
CALIBRATIONS READINGS SETTINGS
Going from one sequence to another is
done by pressing either one button or
simultaneously pressing a combination
of buttons. As can be seen in the
diagram, if no button is pressed for two
minutes while in Setting Sequence, it
will return automatically to Readout
Sequence.
minutes