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534

ANNEXES

נספחים

רוחב מינימאלי של חריצים

לפי דרגת זיהום

TABLE

F

.1 -

Minimum width

of

grooves

Minimum

values

of width

X

of

grooves mm

Pollution

degree

0.25

1

1

2

1.5

3

2.5

4

בחירת מוליך הארקה לפי זרם נומינאלי

Cross

-

sectional

area

of

a

copper

protective

conductor

(8.4.3.2.2)

Minimum

cross

-

sectional

area

of

a

copper

protective

conductor mm

²

Rated

operational

current

Ie

Ie

≤ 20

2.5

20 ˂

Ie

≤ 25

4

25 ˂

Ie

≤ 32

6

32 ˂

Ie

≤ 63

10

63 ˂

Ie

ª S

is

the

cross

-

sectional

area

of

the

phase

conductor

(

mm

²)

Uimp

מרווח מינימאלי לפי

Minimum

clearance mm

Rated

impulse withstand

voltage Uimp

kV

1.5

≤ 2.5

3

4

5.5

6

8

8

14

12

Based

on

inhomogeneous

field

conditions

and

poiiution

degree

3

מוליך הארקה לפי שטח חתך של פזה

Minimum

cross

-

sectional

area

of

a

corresponding

protective

conductor

(

PE

,

PEN

)

Sp

ª mm

²

Cross

-

sectional

area

of

the

phase

conductor S mm

²

S

S

≤ 16

16

16 ˂

S

≤ 35

S

/2

35 ˂

S

≤ 400

200

400 ˂

S

≤ 800

S

/4

800 ˂

S

ª Current

in

the

neutral may

be

influenced where

there

are

significant

harmonics

in

the

load

..

See

8.6.1