Calculate:
Breakdown
Voltage      Output
Format        Notes

Definition:

Equation

Parameters

Diagram

Calculate Breakdown Electric Field of
Acrylic:                  top

Parameter

Value

Units

Special
Values

Inputs:

t (pulse
width)

secondsmillisecondsmicrosecondsnanosecondspicosecondsminutes____________________

d (length)

meterscentimetersmillimetersmicrometersnanometersinchesfeetmilsyardsmileskilometerslightyears____________________

r (ave.
radius)

N
(#insulators)

Output:

V(breakdown)

voltskilovoltsMegavolts____________________

Output
Format:
top

Select Format:

Scientific

Engineering

Fixed

Notes:
top

Source:  1992 Pulsed Power Formulary (Power Modulator
Symposium)

For Acrylic insulators in vacuum
with 45 degree bevel

Assumes pressure below
10-4 Torr

Variations observed at pressures
as low as  10-6 Torr

Typical for 1-2" long insulators
and more that 5 insulators

Dependence of breakdown field on
angle of oiled plexiglass:

(from Pulsed Breakdown of
Insulator Surfaces in a Poor Vacuum by I.D.Smith, 1966)

Copyright ?2000  Raymond J. Allen