6): the rated impulse
voltage for the equipment;
• Other basic insulation (see 4.,
unheated rooms, workshops
and boiler rooms)
Pollution degree The pollution generates per-
sistent conductivity caused by
conductive dust, rain wet
conditions.2 1.25 0.52)
0.15
www.3.04 0.06 0.15
1.82)
0.3
3)
For printed wiring material, the values for pollution
degree apply, except that the value must not less
than 0.2.4.
This involves electric field with essentially
constant (Case non-constant (Case A)
voltage gradients between the electrodes.4.10
1 0.23)4)
0.2
5 1. Factors are divided into four classes based on
expected environmental conditions:
Examples pollution degrees
for assigned areas:
Pollution degree pollution, only dry,
non-conductive pollution
occurs.
6)
The dimensions for pollution degree are specified
for pollution degree except that the minimum clear-
ance 1.3.15)
Case B
Homogeneous Field (see 3.84)
0.5 1.5 5.4.2): the highest
impulse voltage that can occur the circuit
For reinforced insulation, see 5.
The clearances shown Table F.wago.g. However, standardization achieved using
the preferred series impulse voltage values based on
4.5 12.5
15 5.01
0.2 are appli-
cable for installation height 2000
m above sea level.3
2 0.3 0.5 1.5
62)
5.1.
2)
Preferred values specified 4.3.5 12.5 0.10 0.3.5)
• Basic insulation directly exposed significantly influ-
enced transient overvoltages from the low-voltage
mains (see 4.2 contains list information for
Case the inhomogeneous field and for
Case the homogeneous field.5 5.6.06
0.3.5 3.
Values for clearances above 2000 must be
multiplied high correction factor in
accordance with Table A.
Open, unprotected insulated
equipment for outdoor use
.5 1.5 4.6 0.1 and 5.5 0.
Pollution degree Conductive pollution occurs, or
dry, non-conductive pollution
occurs which will become con-
ductive due condensation.6 0.02
0.4 0.8
42)
3 1.2)
Select the minimum clearances accor-
dance with the rated surge voltages and pol-
lution degrees.3.3.2 0.5 5.
Open, unprotected insulated
equipment industrial, busi-
ness and farming areas e.
Equipment with clearance that dimen-
sioned per Case between and B,
requires verification the impulse voltage
test.1.
Table F.
5)
For parts circuit within equipment subject surge
voltages based 4.5 5.52)
0.15 0. maximize the operating life
of the equipment, not below these min-
imum clearances.84)
0.6 mm.
Open, unprotected insulated
equipment air-conditioned or
clean, dry rooms
Pollution degree Only non-conductive pollution
occurs.2 1.5
122)
14 4.1.52)
1.14)
Pollution Degree6
Pollution Degree6
1 3
kV mm
0.04 mm, specified Table F.3.2, interpolation values is
allowed.8 0.45 0.2.01
0.5 4.
Equipment with clearance that dimen-
sioned per Case other words rated for
the most unfavorable case, requires veri-
fication the impulse voltage test.5 1. Pollution has influ-
ence.332)
0.3, 4.com
WAGO Rail-Mount Terminal Block Systems
Technical Information
Dimensioning Clearances
(DIN 60664-1/VDE 0110-1, Table F.25 0.3.2
1.5
40 17
50 22
60 27
80 130 130 130 35
100 170 170 170 45
Pollution Degrees
Pollution factors are all solid, liquid gaseous foreign matter which may reduce the dielectric
strength the specific surface resistance.
Open, unprotected insulated
equipment occupied areas,
shops, laboratories, mechanical
workshops and medical rooms.
1)
This voltage for:
• Functional insulation: the maximum impulse voltage
expected occur across the clearance (see 5.
4)
The minimum clearances given for pollution degree 2
and are based the reduced withstand characteris-
tics the associated creepage distance under humidity
conditions (see IEC 60664-5).5
20 8
25 10
30 12.02 0.5 3.45
2.23)4)
0.5 2
82)
8 3
10 3. Occasional, temporary
conductivity caused conden-
sation can also expected.2.5 0.2 Clearances Withstand Transient Overvoltages
DIN 60664-1/VDE 0110-1
Required
Impulse
Withstand
Voltage1)5)
Minimum Clearances Air 2000 Above Sea Level
Case A
Inhomogeneous Field (see 3.4.
Table F.6
3 0.04
0
