| Utilization of Dielectric Properties |
| The value of η also represents the degree of utilization of the dielectric in between two elecrtodes. A higher value of η represents better utilization of the insulating properties of a dielectric. It compares the ideal condition of electric field intensity (uniform field between electrodes at the same distance d apart) with the existing actual maximum field intensity. Thus η, a dimensionless quantity enables a comparison of the degree of uniformity of field configurations formed between different electrodes. Table 2.1 gives the values of η for typical fields. The value of η lies between, 0 ≤ η ≤ 1 |
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| With the knowledge of the value of η for a particular field configuration, the maximum electric field intensity or the maximum electric stress on a dielectric can easily be estimated. η serves as a ready reference which is an important information for insulation design in equipment. However, for determining the exact magnitude of maximum electric stress, at different shapes of electrodes used in the equipment, numerical estimation techniques have to be applied . |
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