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REJ 521
3.1.2.4.
3.1.3.
10
Earth-Fault Relay
Operator's Manual
How to adjust the display contrast
The display contrast is dependent on the temperature. The REJ 521 automatically
adjusts the contrast for optimum readability. The contrast can also be adjusted
manually. To adjust the contrast, the display must be in the idle mode.
• To increase the contrast, hold down the [E] button and adjust using the [
• To decrease the contrast, hold down the [E] button and adjust using the [
button.
increase
Push
E
and
decrease
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After power-start up of the relay, the factory default value of the display contrast will
automatically be restored.
How to use the push-buttons
The HMI includes push-buttons for manoeuvring the relay.
Clear and Enter buttons
Navigation push-buttons
up
C
Clear/Cancel
left
right
E
Enter
down
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The navigation buttons are used to view, select and edit desired menu items. To
move between the menu items, use the arrow buttons. The item to be edited is
selected and the value stored by pressing the [E] button. To increase or decrease the
activated digit and to shift the activated decimal point, use the [
To cancel and return the HMI to the idle mode, press the [C] button
Table 3.1.3-1
Button navigation and editing
Desired step or operation
Step downward in the main menu or a submenu
Step upward in the main menu or a submenu
Entering a submenu from the main menu or a higher
submenu
Leaving a submenu for the main menu or a higher
submenu
Increasing a value in the setting mode
Decreasing a value in the setting mode
Moving the cursor in the setting mode
Selecting the front connection at power up
Entering or leaving the setting mode, storing a new
value
Entering the monitoring state
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↑
] button.
↓
↑
↓
] and [
] buttons.
.
.
Push-button
↓
↑
→
←
↑
↓
← or →
← and →
E
E and ←
]
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