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7.1.1 Display method for protection characteristic setting values
• Select PROTECT from the main menu screen and press ENTER to switch to the protection characteristics selection screen.
• Switches through LTD
⇔
STD/INST
⇔
ER
⇔
LTD....
* Protection characteristics cannot be set (changed). Use the setting dials on the MDU Breaker main unit to change them.
• 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) Current setting (Ir) check and long time delay operating time (TL), long time delay lamp characteristics (I
6
t), N pole protection
characteristic (NP) setting
• You can check the setting value of current setting (Ir) .
• The long time delay operating time (TL) switches between 12
⇔
60
⇔
80
⇔
100
⇔
12 .... Enter to set the setting value.
• The long time delay lamp characteristics
(
I
6
t
)
switches between ON
⇔
OFF
⇔
ON .... Please enter with Enter.
• N pole protection characteristic (NP) setting switches between ON
⇔
OFF
⇔
ON .... Please enter with Enter. (4 poles only)
• On the change permission screen, select “YES” and change the setting with Enter.
• After pressing the Enter button, it returns to the protection characteristics selection screen.
(2) Set short time delay current (Is), short time delay operating time (Ts) and instantaneous tripping current (Ii) confirm
• The short time delay current (Is) changes to 2.0
⇔
2.5
⇔
3.0
⇔
3.5
⇔
4.0
⇔
5.0
⇔
6.0
⇔
7.0
⇔
8.0
⇔
9.0
⇔
10
⇔
2.0 ....
Enter to set the setting value.
• The short time delay operating time (Ts) switches between 0.1
⇔
0.2
⇔
0.3
⇔
0.1 .... Enter to set the setting value.
• The long time delay lamp characteristics (I
6
t) switches between ON
⇔
OFF
⇔
ON .... Please enter with Enter.
• You can check the setting value of instantaneous tripping current (Ii).
• On the change permission screen, select “YES” and change the setting with Enter.
• After pressing the Enter button, it returns to the protection characteristics selection screen.
[Main menu screen]
[Protection characteristics
selection screen]
To [Protection
characteristics
selection screen]
To [Protection
characteristics
selection screen]
PROTECT
SETTING
AL_RST
ERASE
INFO
MENU
PROTECT
LTD
STD/INST
ER
To [LTD setting value display screen]
MENU
ENTER
MENU
ENTER
MENU
Select with UP/DOWN
PROTECT
Ir
TL
at
LTD
[
A
]
[
S
]
[
%
]
MENU
200
200
PROTECT
LTD
MENU
I
6
t
ON
OFF
NP
ON
OFF
ENTER
MENU
ENTER
MENU
ENTER
MENU
7.1.1-1 Protection characteristic setting and setting method for 250 A frame
Ts setting value
I
6
t ON/OFF
NP
ON/OFF
100
MENU
OK
?
NO
YES
Change NO
⇔
YES
with UP/DOWN
Change NO
⇔
YES
with UP/DOWN
PROTECT
LTD
ENTER
MENU
ENTER
MENU
ENTER
MENU
MENU
OK
?
NO
YES
PROTECT
STD/INST
PROTECT
Is
Ts
STD/INST
[ x
I r
]
[
S
]
MENU
0.3
I
2
t
ON
OFF
PROTECT
STD/INST
MENU
I i
[
A
]
3500
Is setting value
Ii setting value
I
2
t ON/OFF
10.0
[LTD setting value
display screen]
TL setting value
Ir setting value
Set with UP/DOWN
Set with UP/DOWN
Change with
UP/DOWN
Set with UP/DOWN
Select with UP/DOWN
Select with UP/DOWN
[STD/INST setting value
display screen]
Содержание NF250-HEV
Страница 62: ...MEMO ...
Страница 63: ......
Страница 64: ...Nov 2019 LN107A330H02 IB63E30 A 1911 MEE MDU Breakers ...