Datasheet
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611PHOENIX CONTACT
Schematic for determining creepage
distances
Single-phase three or two-conductor AC or DC voltage
systems (extract from Table 3a)
Nominal
voltage of the
power supply
system (mains)
*)
Voltages for Table 4
For conductor-
conductor
insulation
1
)
For conductor-ground
insulation
1
)
All systems
Three-conductor
systems
center point grounded
[V] [V] [V]
12.5 12.5 –
24
25
25 –
30 32 –
42
48
50 **)
50 –
60 63 –
30-60 63 32
100 **) 100 –
110
120
125 –
150 **) 160 –
220 250 –
110-220
220-240
250 125
300 **) 320 –
220-440 500 250
600 **) 630 –
480-960 1000 500
1000 **) 1000 –
1
) Conductor-ground insulation levels for non-grounded systems or
those grounded through impedance correspond to conductor-
conductor insulation levels as the operating voltage of every
conductor to ground can, in practice, reach the conductor-
conductor voltage. This is due to the fact that the actual voltage to
ground is determined by the insulation resistance and the
capacitive reactance of each conductor to ground. A low (but
permissible) insulation resistance of one conductor can thereby
practically ground it and increase the other two to conductor-
conductor voltage to ground.
*) Refer to 2.2.1 for correlation with the rated voltage.
**) These values correspond to the values in Table 1.
Three-phase four or three-conductor AC voltage systems
(extract from Table 3b)
Nominal
voltage of
the power
supply
system
(mains) *)
Voltages for Table 4
For
conductor-
conductor
insulation
All systems
Insulation for conductor-ground
Three-phase
four-conductor
systems with
grounded
neutral
conductor
2
)
Three-phase
three-
conductor
systems non-
grounded
1
)
or
conductor
grounded
[V] [V] [V] [V]
60 63 32 63
110/120/127 125 80 125
150 **) 160 – 160
208 200 125 200
220/230/240 250 160 250
300 **) 320 – 320
380/400/415 400 250 400
440 500 250 400
480/500 500 320 500
575 630 400 630
600 **) 630 – 630
660/690 630 400 630
720/830 800 500 800
960 1000 630 1000
1000 **) 1000 – 1000
1
) Conductor-ground insulation levels for non-grounded systems or
those grounded through impedance correspond to conductor-
conductor insulation levels as the operating voltage of every
conductor to ground can, in practice, reach the conductor-
conductor voltage. This is due to the fact that the actual voltage to
ground is determined by the insulation resistance and the
capacitive reactance of each conductor to ground. A low (but
permissible) insulation resistance of one conductor can thereby
practically ground it and increase the other two to conductor-
conductor voltage to ground.
2
) For equipment designed for use in three-phase four-conductor
and three-phase three-conductor systems, grounded as well as
non-grounded, only the values for three-conductor systems may
be used.
*) Refer to 2.2.1 for correlation with the rated voltage.
**) These values correspond to the values in Table 1.
Creepage distances to prevent failures occurring due to creepage (extract from Table 4)
Voltage
1
)
r.m.s. value
Minimum creepage distances
1
) This voltage is:
a) For function insulation: the
working voltage
b) For basic and additional
insulation of a circuit supplied
directly by the low-voltage
network: either the voltage
selected from Table 3a or 3b on
the basis of the rated voltage of
the equipment or the rated
insulation voltage;
c) For basic and additional
insulation of systems,
equipment, and internal circuits
which are not supplied directly
from the mains: the highest r.m.s.
value of the voltage that, within
the bounds of the rated data, can
occur in the system, the
equipment or the internal circuit,
when supplied with rated voltage
and in the case of the most
unfavorable combination of
operating conditions.
2
) With pollution degree 3,
insulation material group IIIb is
not recommended for use if
voltages are greater than 630 V.
Printed circuits
Pollution degree Pollution degree
1 2 1 2 3
All insulation material
groups
All insulation material
groups except IIIb
All insulation material
groups
Insulation material group Insulation material group
I II III I II III
2
)
[V] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm]
10
12.5
16
0.025
0.025
0.025
0.04
0.04
0.04
0.08
0.09
0.10
0.40
0.42
0.45
0.40
0.42
0.45
0.40
0.42
0.45
1.00
1.05
1.10
1.00
1.05
1.10
1.00
1.05
1.10
20
25
32
0.025
0.025
0.025
0.04
0.04
0.04
0.11
0.125
0.14
0.48
0.50
0.53
0.48
0.50
0.53
0.48
0.50
0.53
1.20
1.25
1.30
1.20
1.25
1.30
1.20
1.25
1.30
40
50
63
0.025
0.025
0.040
0.04
0.04
0.63
0.16
0.18
0.20
0.56
0.60
0.63
0.80
0.85
0.90
1.10
1.20
1.25
1.4
1.5
1.6
1.6
1.7
1.8
1.8
1.9
2.0
80
100
125
0.063
0.10
0.16
0.10
0.16
0.25
0.22
0.25
0.28
0.67
0.71
0.75
0.95
1.00
1.05
1.3
1.4
1.5
1.7
1.8
1.9
1.9
2.0
2.1
2.1
2.2
2.4
160
200
250
0.25
0.40
0.56
0.40
0.63
1.00
0.32
0.42
0.56
0.80
1.00
1.25
1.1
1.4
1.8
1.6
2.0
2.5
2.0
2.5
3.2
2.2
2.8
3.6
2.5
3.2
4.0
320
400
500
0.75
1.00
1.30
1.60
2.00
2.50
0.75
1.00
1.30
1.60
2.00
2.50
2.2
2.8
3.6
3.2
4.0
5.0
4.0
5.0
6.3
4.5
5.6
7.1
5.0
6.3
8.0
630
800
1000
1.80
2.40
3.20
3.20
4.00
5.00
1.8
2.4
3.2
3.2
4.0
5.0
4.5
5.6
7.1
6.3
8.0
10
8.0
10.0
12.5
9
11
14
10.0
12.5
16.0
1250
1600
2000
4.2
5.6
7.5
6.3
8
10
9
11
14
12.5
16
20
16
20
25
18
22
28
20
25
32
2500
3200
4000
10
12.5
16
12.5
16
20
18
22
28
25
32
40
32
40
50
36
45
56
40
50
63
5000
6300
8000
20
25
32
25
32
40
36
45
56
50
63
80
63
80
100
71
90
110
80
100
125
10000
40 50 71 100 125 140 160
Dimensioning of creepage distances
Nominal mains
voltage of the power
supply
Rated AC/DC voltage
Pollution
degree
Minimum creepage
distance K acc. to
Table 4
Insulation
material
Clearance
L
Pollution degree 1
Yes No
Increase K
to L
Yes
K < L
K < L
acc. to case A
No No Yes
Creepage distance K
Increase K to
L acc. to case
A
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