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7.2.3 Fault/alarm display details
[Fault cause/current display screen]
With fault records
[Fault cause/current display screen]
Without fault records
[Alarm display screen]
Displayed in inverse
when an alarm occurs.
LTD : Long time delay trip
STD : Short time delay trip
INST : Instantaneous trip*
Fault cause
Fault current
Overload/short trip
●
PAL
: Load current pre-alarm (250 A frame: enabled with PAL module (option),
displayed as
“
---
”
if disabled. 400/800 A frame: enabled when MDU unit setting
is ON; displayed as
“
---
”
if OFF)
●
OVER : Overcurrent alarm
●
NLA
: Neutral line open phase alarm (enabled when phase wire type is
“
1P3W
”
)
●
IDMAL : Electric current demand alarm (enabled when communication, display is ON;
displayed as
“
---
”
if OFF)
●
ILAL
: Electric current open phase alarm (enabled when communication, display is
ON; displayed as
“
---
”
if OFF)
●
IUBAL : Electric current unbalance alarm (enabled when communication, display is ON;
displayed as
“
---
”
if OFF)
TRIP
ITEM
PHASE
VALUE
-
-
T R I P
I N S T
TRIP
ITEM
PHASE
VALUE
-
-
T R I P
[
-
]
[
A
]
11328
ALARM
ITEM
PHASE
VALUE
-
-
A L A R M
PA L
- - -
- - -
- - -
I D M _ A L
I L A _ A L
I U B _ A L
O V E R
* The fault cause due to the instantaneous tripping of the 250 A frame becomes effective when the “MDU transmission alarm switch (option)” is installed.
Also, if a fault that exceeds the measurement upper limit fault current (16 times the maximum rated current) occurs, the fault factor/fault current may
not be measured or displayed.
• When a fault or alarm occurs, the screen automatically switches to the fault cause/current display screen or alarm display screen,
respectively. The backlight changes to red.
• If an operation button is pressed, the backlight switches back to white, and the display screen switches to the screen that was displayed prior to the
alarm display screen.
(The alarm output status will be retained until the output alarm is reset.)
• If the alarm reset method is set to automatic reset, the backlight will switch back to white and the display screen will switch to the screen that was
displayed prior to the alarm display screen, once the cause of the alarm is eliminated.
(The output alarm will also be reset.)
Содержание NF250-HEV
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