Summary
Due to non-biodegradable and future scarcity, the interest to find a replacement for mineral oil is increasing. One of the potential replacement for the mineral oil is natural ester. This paper investigated the formation properties of cellulose bridges and the leak current in mineral oil and natural ester under different DC electrical fields. The electrodes are spherical electrodes. When the DC voltage increased, either the velocity of cellulose particles or the formation of bridges were more rapid coupled with thicker bridges. However, owing to the larger dynamic viscosity for natural ester, cellulose particles migrated more slowly and attached to the anode easily just like some beard. As a consequence, the characteristics of bridges were different in two cases, such as the shape, thickness, etc. The leak current in contamination oil was larger than that in clean one clearly. The higher the voltage was, the larger the saturation current was. Nonetheless, for the natural ester, the current was smaller and the formation of bridges was more difficult at the same voltage, which indicates that cellulose particles have a less viscous effect on the leak current of natural ester as well as the better insulation performance.
Additional informations
| Publication type | ISH Collection |
|---|---|
| Reference | ISH2017_224 |
| Publication year | |
| Publisher | ISH |
| File size | 357 KB |
| Pages number | 5 |
| Price for non member | Free |
| Price for member | Free |
Keywords
