Filter
Top Products
⎯ 82 ⎯
6 F 2 S 0 8 5 7
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.
4.2.1 LCD and LED Displays
Displays during normal operation
When the GRT100 is operating normally, the green "IN SERVICE" LED is lit and the LCD is off.
Press the
VIEW
key when the LCD is off to display the digest screens which are "Metering",
"Latest fault" and "Auto-supervision" screens in turn. The last two screens are displayed only
when there is some data. The following are the digest screens and can be displayed without
entering the menu screens.
M
e
t
e
r
i
n
g
0
8
/
D
e
c
/
1
9
9
7
2
2
:
5
6
Ia1 ***.*kA Ia **.**kA
I
b
1
***
.
*
k
A
I
b
**
.
**
k
A
I
c
1
***
.
*
k
A
I
c
**
.
**
k
A
2
2
2
In **.**kA
I
n
**
.
**
k
A
1
2
1
M
e
t
e
r
i
n
g
0
8
/
D
e
c
/
1
9
9
7
2
2
:
5
6
Ia3 ***.*kA
I
b
3
***
.
*
k
A
I
c
3
***
.
*
k
A
**
.
*
H
z
In **.**kA
V
***
.
*
k
V
3
2
Note: I 1 for primary(high-voltage) winding current
I 2 for secondary(medium-voltage) winding current
I 3 for tertiary(low-voltage) winding current
Ia, Ib, Ic for phase current
In for neutral current
Press the
RESET
key to turn off the LCD.
For any display, the back-light is automatically turned off after five minutes.
Displays in tripping
L
a
t
e
s
t
f
a
u
l
t
0
8
/
D
e
c
/
1
9
9
7
2
2
:
5
6
:**
.
***
Phase BC Tri
p
D
I
F
T
1-2-3-
4
-
5
If a fault occurs and a tripping command is output when the LCD is off, the red "TRIP" LED and
other configurable LED if signals assigned to trigger by tripping.
Press the
VIEW
key to scroll the LCD screen to read the rest of messages.
Press the
RESET
key to turn off the LEDs and LCD display.
Notes:
1) When configurable LEDs (LED1 through LED4) are assigned to latch signals by trigger of
tripping, press the
RESET
key more than 3s until the LCD screens relight. Confirm turning off
the configurable LEDs. Refer to Table 4.2.1 Step 1.
2) Then, press the
RESET
key again on the "Latest fault" screen in short period, confirm turning