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Mitsubishi Electric NF400-SEW Instruction Manual page 39

Mdu breaker: breaker-mounting
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(4) Short time delay operating time (Ts) check
　・ The short time delay operating time (Ts) setting value can be checked in the STD/INST setting value display screen.
[STD/INST setting value
display screen]
Select with UP/DOWN
P
R
O
T E C
T
S T D / I
N S
T
I
s
T
s
I i
[
s ]
0
.3
Ts setting value
I
2 t
●
O N
O F
F
I
t
2
ON/OFF
(5) Instantaneous tripping current (Ii) check
　・ The instantaneous tripping current (Ii) setting value can be checked in the STD/INST setting value display screen.
[STD/INST setting value
display screen]
Select with UP/DOWN
P
R
O T C T
E
S
T D
/ I N S
T
I s
T s
I i
[
A
]
35
0
0
Ii setting value
(6) Rated sensitivity current I ⊿ n and maximum operating time (Te) display
　・ Select ER in the protection characteristic selection screen. (Screen [1])
* " -- " displayed for MCCBs.
* ER: Electric leakage characteristic.
[Protection characteristics
selection screen]
ENTER
P
R O T E
C T
RETURN
L
T D
S T D
/ I N S
T
E R
Select with
UP/DOWN
Screen [1]
● 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 delya operating time (at Is × 1.5)
● I
t
: Long time delay lamp characteristics
6
● I
t
: Short time delaylamp characteristics
2
● I ⊿ n
: Rated sensitivity current
● Te
: Maximum operating time
[ER setting
value display screen]
DOWN
P
R O T E C T
E R
UP
- - -
- - -
Screen [2]
[ER setting
value display screen]
P
R O T E C T
E R
- - -
- - -
Screen [3]
T
I
t OFF
6
Operating
time
38
I
t ON
6
TL
Is
I
t ON
2
Ts
Ii
I
t OFF
2
Current
I
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