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535
ANNEXES
נספחים
Ui
מרחק זחילה לפי מתח הבדדה
Minimum creepage distance mm
Rated insulation
voltage Ui
Pollution degree
3
2
1
Material group ͨ
Material group ͨ
Material group ͨ
IIIb
IIIa
II
I
IIIa and IIIb
II
I
All material groups
Vᵇ
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
32
1.8
1.8
1.6
1.5
1.5
1.5
1.5
1.5
40
1.9
1.9
1.7
1.5
1.5
1.5
1.5
1.5
50
2
2
1.8
1.6
1.5
1.5
1.5
1.5
63
2.1
2.1
1.9
1.7
1.5
1.5
1.5
1.5
80
2.2
2.2
2
1.8
1.5
1.5
1.5
1.5
100
2.4
2.4
2.1
1.9
1.5
1.5
1.5
1.5
125
2.5
2.5
2.2
2
1.6
1.5
1.5
1.5
160
3.2
3.2
2.8
2.5
2
1.5
1.5
1.5
200
4
4
3.6
3.2
2.5
1.8
1.5
1.5
250
5
5
4.5
4
3.2
2.2
1.6
1.5
320
6.3
6.3
5.6
5
4
2.8
2
1.5
400
8
8
7.1
6.3
5
3.6
2.5
1.5
500
10
10
9
8
6.3
4.5
3.2
1.8
630
ª
12.5
11
10
8
5.6
4
2.4
800
16
14
12.5
10
7.1
5
3.2
1000
20
18
16
12.5
9
6.3
4.2
1250
25
22
20
16
11
8
5.6
1600
NOTE
1
The CTI
values
refer
to
the
values
obtained
in
accordance with
IEC
60112;2003 ,
method A
,
for
the
insulating material
used
.
NOTE
2
Values
taken
from
IEC
60664-1 ,
but maintaining
a minimum
value
of
1.5
mm
.
a
-
Insulation
of material
group
IIIb
is
not
recommended
for
use
in
pollution
degree
3
above
630
V
.
b
-
As
an
exception
,
for
rated
insulation
voltages
127,208,415,440,660/690
and
830
V
,
creepage
distances
corresponding
to
the
lower
values
125,200,400,630,
and
800
V may
be
used
.
c
-
Material
groups
are
classified
as
follows
,
according
to
the
range
of
the
comparative
tracking
index
(
CTI
) (
see
3.6.16):
Material
group
I
- 600 ≤
CTI
Material
group
II
- 400 ≤
CTI
˂ 600
Material
group
IIIa
- 175 ≤
CTI
˂ 400
Material
group
IIIb
- 100 ≤
CTI
˂ 175