Arc resistance

The aim of this test method is to make a relative distinction between solid electrical insulating materials.

The ability of the test specimens to resist an arc at a high voltage but with a weak current in the vicinity of the insulating surface is investigated. The test focuses on the time until tracking paths start to form.

Arc resistance

 

Stress table

Current

in [mA]

Total time

in [s]

Make

in [s]

Break

in [s]

10 0-60 0,25 1,75
10 60-120 0,25 0,75
10 120-180 0,25 0,25
10 180-240 60
20 240-300 60
30 300-360 60
40 360-420 60

 

Test specimen ≥20 mm x ≥15 mm x ≥3,17 mm
Test voltage 12.500 V (50 Hz) cyclical/continuous
Test current 10 mA to 40 mA
Failure criteria
  • EConductive path forms
  • Material burns
  • Material melts (hole is formed)