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7.2.3 Fault/alarm display details
[Fault cause/current display screen]
With fault records
T R I P
11328
I N S T
ITEM
PHASE
TRIP
－
[Alarm display screen]
A L A R M
PA L
O V E R
- - -
- - -
ITEM
PHASE
ALARM
－
Displayed in inverse
when an alarm occurs.
* 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.)
［ A ］
Fault cause
Overload/short trip
LTD
STD : Short time delay trip
VALUE
INST : Instantaneous trip*
－
Fault current
● PAL
- - -
● OVER
I D M _ A L
● NLA
I L A _ A L
● IDMAL : Electric current demand alarm (enabled when communication, display is ON;
I U B _ A L
VALUE
－
● ILAL
● IUBAL : Electric current unbalance alarm (enabled when communication, display is ON;
[Fault cause/current display screen]
T R I P
: Long time delay trip
ITEM
TRIP
: 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
---
"
"
: Overcurrent alarm
: Neutral line open phase alarm (enabled when phase wire type is
displayed as
---
if OFF)
"
"
: Electric current open phase alarm (enabled when communication, display is
ON; displayed as
"
---
"
if OFF)
displayed as
---
if OFF)
"
"
57
Without fault records
［ －］
PHASE
VALUE
－
－
if OFF)
1P3W
)
"
"
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