Short Circuit Protection - LEGRAND 0 281 64 Mode D'emploi

Protection unit
Ground fault protection
(only for item 0 281 66
and 0 281 68)
Setting of current (9 steps)
Ig=0.2-0.3-0.4-0.5-0.6-0.7-0.8-1
×In-OFF
Setting of time delay (@12×Ig)
(4+4 steps)
tg=0.1-0.2-0.5-1s(t=const)
tg=1-0.5-0.2-0.1s(I t=const)
Long time protection
Setting of current (2x6 steps)
Ir=0,4÷1×In
With 2 switches
(0,4÷0,9, steps of 0,1
0,0÷0,1, steps of 0,02)
Example:
Ir =(0.4+0.06)×In= 0.46 In
Setting of time delay (@6Ir)
(4+4 steps)
tr=5-10-20-30s (MEM ON)
tr=30-20-10-5s (MEM OFF)
MEM OFF = thermal memory off
MEM ON = thermal memory on

Short circuit protection

Setting of current (9 steps)
Isd=1.5-2-2.5-3-4-5-6-8-10xIr
If Ii<Isd, then instantaneous setting
prevails against the magnetic one.
*"Fixed instantaneous short
time protection=Isf=Icw@415V"
0 281 66
lg tg
test
1
0.5 0.6 0.7 1
0.5
0.5
0.4 0.8
0.2
1 0.2 0.1 0 281 66
0.3
0.2
0.1
OFF
lg tg
test
1
0.5 0.6 0.7 1
0.5
tsd l
2
li lsd 0.5 t=k@12lr
0.4 0.8
0.2
6 8 10
3 4 5 1 1 0.5
0.3 1 0.2 0.1
0 281 66
4 12 2.5 6 0.5
0.2
0.2 0.1
OFF
8
3 15 2 0.2 0.1
2 lcw 10
1.5
0.1
lg tg
test
x ln x lr s
0.5 0.6 0.7 1 1 tsd l
2
lsd 0.5 t=k@12lr
li
0.5
0.8
0.4 6 8 10 3 4 5 0.2 1 1 0.5
0 281 66
tr
lr 1 0.2 2.5 6 0.1 MEM-OFF
0.3 4 12 0.5 0.2
0.06 0.08 0.1
0.7 0.8 0.9 30 30 20
0.2
15 0.1 2 8 0.1
3 0.2
OFF
0.04 20
0.6 10
lcw 10
2
1.5
lg tg 0.1
test
0.02 10
0.5 5
1
0.5 0.6 0.7 1
0.5
x ln x lr s
+ 5
0.4 0.00
0.5 tsd l
0.4 0.8
0.2 2
li lsd t=k@12lr
@6I r
s
x ln
6 8 10 1 0.2 3 4 5 0.1 1 1 0.5
0.3
tr MEM-OFF
lr
0.2 4 12 2.5 0.1 0.06 0.08 0.1 6 0.5
0.7 0.8 0.9 30 30 20 0.2
OFF
MAN AUT
N 8
3 15 0.04 2 0.2 20 0.1
0.6 10
lcw 100% 10
0.5 2 0.02 1.5 10 5
0.1
ON lr
x
0.4 + tsd l 5
0.00 2
x ln lsd x lr
li t=k@12lr s
50%
6 8 10 1 1 0.5
3 4 5 @6I r
s
x ln
l>.90
OFF
2.5
4 12 6 0.5 0.2
tr
lr MEM-OFF
l>1.05
0.06 0.08 0.1
0.7 0.8 0.9 15 2 8 30 30 20
3 MAN AUT 0.2 0.1
N
OK 10 20 C
0.6 2 lcw 0.04 10
1.5
0.1
100%
ON x lr 0.02 0 281 66
0.5 10 5
x ln x lr s
+ 5
0.4 50% 0.00
@6I r
l>.90 s
OFF x ln tr MEM-OFF
lr
l>1.05
0.06 0.08 0.1
0.7 0.8 0.9 30 30 20
lg tg
test
MAN 0.04 20
0.6 AUT 10
N
OK 0.5 0.6 0.7 1 1 C
0.5
0.5 0.02 10 5
0.5
0.8
0.4 100% 0.2 0 281 66
ON lr
x
0.4 + 5
0.00
1 0.2 0.1
0.3
50%
0.2 @6I r
0.1 s
x ln
OFF
l>.90
OFF
l>1.05
lg tg
MAN AUT test
N
1
0.5 0.6 0.7 1
0.5
OK tsd l C
100%
2
li lsd 0.5 t=k@12lr
0.4 0.8
ON lr 0.2
x
0 281 66
6 8 10 3 4 5 1 1 0.5
1 0.2 0.1
0.3
50%
4 12 2.5 6 0.5
0.2
0.2
0.1
OFF
l>.90 8
3 15 OFF 2 0.2 0.1
l>1.05
lcw 10
2 1.5
0.1
lg tg
test
OK C
x ln lr
0.5 0.6 0.7 1 1 x tsd l s
2
0.5
li lsd t=k@12lr
0 281 66
0.8 0.5
0.4 6 8 10 0.2 1 1 0.5
3 4 5
tr
lr 2.5 MEM-OFF
0.3 4 12 1 0.2 6 0.1 0.5
0.2
0.06 0.08 0.1
0.7 0.8 0.9 30 30 20
0.2
15 0.1 2 8
3 0.2 0.1
OFF
20
0.6 0.04 10
10
2 lcw
1.5
lg tg 0.1
test
0.02
0.5 10 5
1
0.5 0.6 0.7 1
x ln 0.5 x lr s
+ 5
0.4 0.00
0.5 tsd l
0.4 0.8
0.2 2
li lsd t=k@12lr
@6I r
s
x ln
6 8 10 1 0.2 3 4 5 0.1 1 1 0.5
0.3
tr MEM-OFF
lr
0.2 2.5 0.06 0.08 0.1 6 0.5
4 0.7 0.8 0.9 12 0.1 30 30 20 0.2
OFF
MAN AUT
N
15 0.04 2 8 0.2 20 0.1
0.6 3 10
lcw 10
2 0.02 100% 1.5 10 5
0.5 0.1
ON lr
x
0.4 + tsd l 5
0.00 2
x ln
li lsd x lr t=k@12lr s
50%
6 8 10
3 4 5 1 1 0.5 @6I r
s
x ln
l>.90
OFF
4 12 2.5 6 0.5
0.2
lr tr MEM-OFF
l>1.05
0.06 0.08 0.1
OK 8 30 30 20 C
3 0.7 0.8 0.9 MAN 15 AUT 2 0.2 0.1
N
0.6 2 lcw 0.04 10 20
1.5 10
0.1
100%
ON lr 0 281 66
0.5 x 0.02 10 5
x ln x lr s
0.4 + 50% 5
0.00
l>.90 @6I r s
OFF x tr
lr ln MEM-OFF
lg tg
test
l>1.05 0.06 0.08 0.1
0.7 0.8 0.9 30 30 20
OK 1 C
0.5 0.6 0.7 1
0.5
MAN AUT 0.04 20
0.6 10
N 0.5
0.4 0.8
0.2
0.02 10
0.5 5
0 281 66
0.3 1 0.2 100% 0.1
lr
ON x
+ 5
0.4 0.00
0.2 0.1
OFF
50%
@6I r
s
x ln
lg
l>.90 tg
OFF test
0.5 0.6 0.7 l>1.05 1
1
MAN AUT 0.5
OK N tsd l C
2
lsd t=k@12lr
li 0.8 0.5
0.4
0.2
6 8 10 100% 3 4 5 1 1 0.5
0.3 ON 1 lr 0.2 0.1
x
2.5 6 0 281 66
4 12 0.5 0.2
0.2 0.1
OFF 50%
15 2 8 0.1
3 0.2
l>.90 lcw 10
2 OFF
1.5
0.1
lg l>1.05 tg
test
OK C
x ln 1 x lr s
0.5 0.6 0.7 1 tsd l
0.5 2
lsd t=k@12lr
li
0.5
0.4 0.8
6 8 10 3 4 5 0.2 1 1 0.5
0 281 66
tr MEM-OFF
lr 1 0.2 2.5 6 0.1 0.5
0.3 4 12 0.2
0.06 0.08 0.1
0.7 0.8 0.9 30 30 20
0.2 0.1
15 2 8 0.2 0.1
3 OFF
0.04 20
0.6 10
lcw 10
2 1.5
lg tg 0.1
test
0.5 0.02 10 5
0.5 0.6 0.7 1
1
ln 0.5
x x lr s
0.4 + 5
0.00
0.5 tsd l
0.4 0.8 2
lsd 0.2
li t=k@12lr
@6I r
s
6 8 10 x ln 1 1 0.5
0.3 1 0.2 3 4 5 0.1
lr tr MEM-OFF
2.5
0.2 4 12 0.1 0.06 0.08 0.1 6 0.5 30 30 20 0.2
0.7 0.8 0.9
OFF
N
15 2 8
0.6 3 0.04 0.2 20 0.1
10
10
2 lcw 100%
0.5 0.02 1.5 10 5
0.1
ON x lr
0.4 + tsd l 5
0.00 2
x ln lsd x lr t=k@12lr s
li
50%
6 8 10 3 4 5 1 1 0.5
@6I r
x s
ln
l>.90
OFF
2.5 6 0.5
4 12 0.2
tr MEM-OFF
lr l>1.05
0.06 0.08 0.1
0.7 0.8 0.9 15 2 8 0.2 30 30 20 0.1
3
N
OK C
lcw 0.04 10 20
0.6 2 1.5 10
0.1
100%
lr
ON x 0.02 10 5
0.5
x ln x lr s
0.4 + 50% 5
0.00
l>.90 @6I r
OFF s
x ln tr MEM-OFF
lr
l>1.05
0.06 0.08 0.1
0.7 0.8 0.9 30 30 20
lg tg
test
0.6 0.04 20
N 10
OK 0.5 0.6 0.7 1 C
1
0.5
0.5 0.02 10 5
0.8 0.5
0.4 100%
0.2
ON lr
x
0.4 + 5
0.00
0.3 1 0.2 0.1
50%
0.2 0.1 @6I r
s
OFF x ln
l>.90
OFF
lg l>1.05 tg
test
N
0.5 0.6 0.7 1 1
0.5
OK tsd l C
100% 2
lsd 0.5 t=k@12lr
li 0.8
0.4 0.2
ON x lr
6 8 10 3 4 5 1 1 0.5
1 0.2 0.1
0.3
50%
2.5 6 0.5
4 12 0.2
0.2
0.1
OFF
l>.90
15 2 8 0.2 0.1
3 OFF
l>1.05
lcw 10
2 1.5
0.1
lg tg
test
OK C
ln
0.5 0.6 0.7 x 1 x lr tsd l s
1
0.5 2
li lsd t=k@12lr
0.5
0.4 0.8
6 8 10 3 4 5 0.2 1 1 0.5
lr tr MEM-OFF
0.3 12 1 0.2 2.5 6 0.1 0.5
4 0.2
0.06 0.08 0.1
0.7 0.8 0.9 30 30 20
0.2 0.1 8
3 15 2 0.2 0.1
OFF
0.6 0.04 20
10
lcw 10
2 1.5
lg tg 0.1
test
0.5 0.02 10 5
0.5 0.6 0.7 1 1
x ln 0.5 lr
x s
0.4 + 5
0.00
0.5
0.8 tsd l
0.4 0.2 2
lsd t=k@12lr
li
@6I r
x s
6 8 10 3 4 5 ln 1 1 0.5
0.3 1 0.2 0.1
tr
lr MEM-OFF
0.2 2.5 0.06 0.08 0.1 6
4 0.7 0.8 0.9 12 0.1 0.5 30 30 20 0.2
OFF
N
15 2 8 20 0.1
0.6 3 0.04 0.2 10
lcw 10
2 0.02 100%
0.5 1.5 10 5
0.1
lr
ON x
+ tsd l
0.4 0.00 5
2
li x ln lsd x lr t=k@12lr s
50%
6 8 10 3 4 5 1 1 0.5 @6I r
s
x ln
l>.90
OFF
12 2.5 6 0.5
4 0.2
tr MEM-OFF
lr l>1.05
0.06 0.08 0.1 8
3 0.7 0.8 0.9 15 2 0.2 30 30 20 0.1
N
lcw 0.04 10 20
0.6 2 1.5 10
0.1
100%
ON lr
0.5 x 0.02 10 5
x ln lr
x s
0.4 + 50% 5
0.00
l>.90 @6I r
OFF tr s
lr x ln MEM-OFF
l>1.05 0.06 0.08 0.1
30 30 20
0.7 0.8 0.9
20
0.6 0.04
N 10
0.02
0.5 10 5
100%
ON x lr
0.4 + 5
0.00
50%
@6I r s
x
ln
l>.90
OFF
l>1.05
N
100%
ON lr
x
50%
l>.90
OFF
l>1.05
33