4.2 Operation of the User Interface
The user can access such functions as recording, measurement, relay setting and testing with the
LCD display and operation keys.
Note: LCD screens depend on the relay model and the scheme switch setting. Therefore,
LCD screens described in this section are samples for a typical model.
4.2.1 LCD and LED Displays
Displays during normal operation
When the GRE110 is operating normally, the green "IN SERVICE" LED is lit and the LCD is off.
Press the ▼ key when the LCD is off to display the digest screens which are "Indication",
"Metering", "Latest fault", "Auto-supervision" and "Alarm Display" screens in turn. "Latest fault",
"Auto-supervision" and "Alarm Display" screens are displayed only when there is some data. The
following are the digest screens and can be displayed without entering the menu screens.
Indication
Metering
TB3
TB2
1
3
5
7
9
11
13
Figure 4.1.3 Location of Optional Communication Port
I
N D 1 [
0 0 0 0
I
N D 2 [
0 0 0 0
I
a
I
b
I
c
I
e
I
s
e
*
82
TB1
2
1
2
3
4
4
5
6
6
8
7
8
9
10
11
12
10
12
14
for Optional
Communication Port
0 0 0 0 ]
0 0 0 0 ]
*
* .
*
* k A
*
* .
*
* k A
*
* .
*
* k A
*
* .
*
* k A
*
.
*
*
* k A
6 F 2 T 0 1 7 2
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