KRB-5404
77
5-5-2. Operation Indication and Indication Resetting Procedure
(AGR-21B,22B,31B type)
The OCR indicates a trip/alarm event on the LCD and provides contact output as shown in Table 39. Pressing the right or left key of
the cross button changes the display from "trip/alarm cause" / "fault current/voltage/power" to "operating time" (if applicable).
Pressing the MENU button returns the display to the previous screen. (Events saved in the event log can always be displayed on the
maintenance screen. See 5.3.2.8). To reset contact output while retaining the event log, turn off the control power (Fig. 19
□
01
,
□
11
,
□
21
)
at least 1 sec. To delete the event log and reset contact output on the LCD, follow the procedure shown in 5.3.2.5 "Reset screen".
Table 39-1 Operation indication 1
Operation
LCD
Contact output
Con
tr
o
l p
o
we
r
su
p
p
ly
State
Terminal
No.
See Fig. 19
State
Normal
operation
When picked up
When activated
(Use the right or left key of the cross button for
screen navigation)
After
control
power is off
for at least
1 sec.
Normal
operation
When
activated
After
control
power is off
for at least
1 sec.
Long time delay trip
(LT)
N-phase protection
(NP)
Normal
indication
Normal
indication
○
1
□
05
–
□
15
OFF
ON
○
2
OFF
Req
u
ir
e
d
Short time delay trip
(ST)
–
□
05
–
□
25
ON
○
2
Instantaneous trip
(INST/MCR)
–
○
3
Ground fault trip
(GF)
–
□
05
–
□
16
ON
Reverse power trip
(RPT)
□
05
–
□
16
ON
○
2
Negative-phase
sequence protection
(NS)
□
05
–
□
17
ON
The ACB can be opened, closed or tripped, irrespective of whether or not the operation indication is reset.
The operation indication is updated when a protective function is activated.
means flashing.
○
1
The event log is not cleared.
○
2
For S characteristic, the delay is as short as 500 ms or more.
○
3
"- - - - (kA)" is indicated when the short time delay or instantaneous trip function is activated and [
I
CT
] × 17 is exceeded.
