ABB UniGear 500R - Technical Data; Electrical Data; Resistance to Internal Arc Faults

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3. Technical data
3.1 Electrical data
Version
[ - ]
ENA
IEC
IEC
Rated voltage
[ kV ]
12
12
17.5
Rated insulated voltage
[ kV ]
12
12
17.5
Maximum service voltage
[ kV ]
12
12
15.4
Rated power frequency withstand voltage
[ kV ]
28
38
28
38
Rated power frequency over isolation distance
[ kV ]
32
45
32
45
Rated lightning impulse withstand voltage
[ kV ]
75
95
75
95
Rated lightning impulse withstand voltage over isolation distance
[ kV ]
85
110
85
110
Rated frequency
[ Hz ]
50 / 60
50 / 60
50 / 60
Rated short time withstand current 3s
[ kA ]
25
31.5
31.5
Peak current
[ kA ]
62.5
80
80
Internal arc withstand current 1s
[ kA ]
25
31.5
31.5
Branch connection rated current
[ A ]
2000
2000
2000
Main busbar rated current
[ A ]
2000
2000
2000
3.2 Resistance to internal arc faults
The fault withstand capacity is as follows:
 IEC version: 31.5 kA x 1 s
 ENA version: 25 kA x 1 s
The switchgear units have been tested according to
IEC 62271-200 Standards (appendix A, accessibility
type A, criteria 1 to 5) and also to ENATS 41-36. In
individual cases, depending on the configuration of
the switchgear panels and/or the switchgear room
conditions (e.g. low ceiling height), additional
measures may be necessary to ensure compliance
with criterion 1.