Abstract
Test results are compared for impulse-breakdown level of the turn insulation in electrical machine coils, with and without grounded metallic sheath, using a voltage surge with a risetime of the order of 0. 2 mu s. It is found that the breakdown of the machine coil in the sheathed condition is indicated by a large drop in the first peak voltage, along with a complete change in the voltage waveform.
| Original language | English |
|---|---|
| Pages (from-to) | 663-667 |
| Number of pages | 5 |
| Journal | IEEE Transactions on Electrical Insulation |
| Volume | EI-21 |
| Issue number | 4 |
| Publication status | Published - Aug 1986 |