Page 594 - Wago_Rail-MountedTerminalBlockSystems_Volume1_2015_US.pdf

14 Tests and Testing Procedures per IEC/EN Standards (continued)

592 Electrical Tests (continued)

• Insulation Parameters to IEC/EN 60664-1 (continued)
Creepage Distances, Table F.3a - Single-Phase, 3- or 2-Wire, AC or DC Systems
Rated Voltages,
Material Groups
Voltages for Table F.4
Criteria for dimensioning creepage dis-
tances are the rated voltages, pollution Nominal voltage of the supply For insulation line-to-line 1) For insulation line-to-earth 1)
degrees and material groups. system (mains) * All systems Three-wire systems
The pollution degrees specified for the mid-point grounded
clearances, and its quoted allocation to
locations, is also applicable for creepage V V V
distances.
Tables F.3 a and F.3 b of 12.5 12.5
DIN EN 60664-1/ VDE 0110, Part 1
contain the rated voltages which have to 24
be considered for dimensioning the mini- 25 25
mum creepage distance. 30 32
42
48
50 ** 50
60 63
30 - 60 63 32
100 ** 100
110 125
120
150 ** 160
200 200
110 - 200 200 100
220 250
110 - 220
120 - 240 250
300 ** 320
220 - 440 500 250
600 ** 630
480 - 960 1000 500
1000 ** 1000
1) Line-to-earth insulation level for non-grounded or impedance-grounded systems equals that for line-to-line, as the
operating voltage to ground of any line can, in practice, approach full line-to-line voltage. This is because the actu-
Table A.2: al voltage to ground is determined by the insulation resistance and capacitive reactance of each line to ground;
thus, low (but acceptable) insulation resistance of one line can in effect ground it and raise the other two to full
Height Correction Factors line-to-line voltage to ground.
(DIN EN 60664-1/VDE 0110, Part 1) * For the relationship to rated voltage see 4.3.2.
** These values correspond to the values given in Table F.1.
Height Standard Multiplier
(elevation) air pressure for
m kPa distance
2000 80 1
3000 70 1.14
4000 62 1.29
5000 54 1.48
6000 47 1.7
7000 41 1.95
8000 35.5 2.25
9000 30.5 2.62
10000 26.5 3.02
15000 12 6.67
20000 5.5 14.5