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(3) Rated Sensitivity Current I Δ n, Maximum Operating Time Te Check
* No fuse breaker will be displayed as " - " .
[Earth leakage characteristics
ER setting value display screen]
PROTECT
ER
---
---
MENU
● I r
: Current setting
● I i
: Instantaneous tripping current
● T L
: Long time delay operating time (at 200%)
● I s
: Short time delay tripping current
● Ts
: Short time delay operating time (at Is × 1.5)
● I
t
: Long time delay lamp characteristics (*)
6
● I
t
: Short time delay lamp characteristics (*)
2
● I ⊿ n
: Rated sensitivity current
● Te
: Maximum operating time
7.1.1-2 Protection characteristic setting and setting method for 400/800 A frame
• The setting current from the measurement display unit can not be changed for current setting (Ir) and instantaneous tripping current (Ii).
Please change with the setting knob on the breaker.
(1) Confirm current setting 2 (lr) and long time delay operating time (TL)
• MDU Breaker main unit current setting 2 (lr) and long time delay operating time (TL) setting values can be confirmed on the LTD setting value display screen.
[LTD setting value
display screen]
PROTECT
LTD
Ir
TL
at
200 12
200
[ % ]
[ A ]
[ S ]
MENU
(2) Confirm short time delay tripping current (Is) and short time delay operating time (Ts), and then confirm instantaneous tripping current (Ii).
• Short time delay tripping current (ls), short time delay operating time (Ts), and instantaneous tripping current (Ii) setting values can be confirmed on
the STD/INST setting value display screen.
[STD/INST setting value
display screen]
PROTECT
STD/INST
Is
Ts
I
2
t
2.0 0.06
ON
OFF
[× I r ]
[ S ]
MENU
Is and Ts setting values
I ⊿ n and Te setting values
PROTECT
LTD
ENTER
I
t
6
ON
OFF
MENU
Ir and TL setting
values
PROTECT
STD/INST
ENTER
I i
1600
MENU
[ A ]
I
t ON/OFF
2
T
Operating
time
I
t ON/OFF
6
MENU
Ii setting value
MENU
39
I
t ON
6
TL
I
t OFF
6
Is
I
t ON
2
I
t OFF
2
Current
Ts
Ii
I
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