Average breakdown voltage at 20°C

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Calculation of Breakdown Voltage (Test acc. to IEC 60851.5.4.2, cylinder)

Calculation of average value Ds Example
Ds=t*Vµ(volt), with
Ds : breakdown voltage
t : increase with insulation, t = da - dnom, with
da : outer diameter
dnom : bare wire diameter
Vµ : Volt per micron insulation
Test with cylindrical electrode
dnom = 0.071mm (41 AWG)
da = 0.083mm
t = da - dnom = 0.083 - 0.071 = 0.012mm = 12 µm
Vµ = 220 V/µm, therefore
Ds = 12µ * 220 V/µ = 2,640 V

 

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