Principle
Dielectric Strength, also known as Break Down Voltage, testing is used to measure the electrical strength of a material as an insulator. Dielectric strength is defined as the maximum voltage required to produce a dielectric breakdown through the material and is expressed as Volts per unit thickness. A higher dielectric strength represents a better quality of insulator.
Capabilities
AC and DC
- ASTM D149 (AC voltage)
- ASTM D3755 (DC voltage)
- 4" square sample or larger (thicker samples are tested in oil bath to avoid corona arcing)
- Testing temperatures (lab ambient)
Equipment
| Equipment Type | Information |
|---|
| Hipotronics Model D149-DI | - Testing up to 100KV
- Open air or oil bath electrodes
- AC and DC voltage testing
- Utilizes 0.1% solution of NH4Cl
- Three methods
- Short time
- Slow rate-of-rise
- Step-by-step
|
| | - Typical oil bath fixture
- Typical open air fixture
|
