Display; Display Idle Mode; Display Test At Power Up; Display Backlight - ABB REJ 527 Operator's Manual

1MRS 751055-MUM
3.1.2.
3.1.2.1.
3.1.2.2.
3.1.2.3.
Directional or Non-Directional Earth-Fault Relay
Operator's Manual

Display

Display idle mode

Self-supervision tests are run during initialisation. After all tests are completed, the
display will return to idle mode showing the text ABB.
READY START TRIP
ABB
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Display test at power up

When the auxiliary voltage is connected to the protection relay:
1. The backlight goes on.
2. The LCD display is tested by inverting it for a short time.
3. The display returns to idle mode and the backlight turns off.
READY START TRIP
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Display backlight

• Normally the backlight of the display is off.
• When an arrow button on the MMI is pressed, the backlight turns on. If the MMI
panel has not been used for about 5 minutes, the backlight goes off automatically.
• A power saving built-in feature: pressing the [C] button switches the backlight
off within 20 seconds.
C
E
C
E
REJ 527
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