| Property |
Requirements |
| Breakdo wn Voltage（KV） |
under normal |
≥2.5 |
| after dampening |
≥1.5 |
| after winding |
≥1.2 |
| Elasticity |
Temp:20±5degree，humidity:65±5%，the sleeving has been wound around the specified mandrel for 1 hour |
The coating should not crack or appear detached |
| The sleeving has been treated for 2hours at a temperature of 10 to 15 degree below zero.then has been around the specified mandrel immediately. |
The coating should not crack or appear detached |
| The sleeving has been treated at a temperature of 130±2degree for 24hours and is wound around a specific mandrel at the room temperature of 20±2 degree |
The coating should not crack or appear detached |
| Oil resistance |
The sleeving has been dipped in transformer oil for 24hours at a temperature of 105±2degree |
The coating should not crack or appear detached.But the colour of the sleeving is allowed to grow darker. |
| Benzene resistance |
The sleeving has been kept in methylbenzene at a normal atmospheric temperature for 4hours |
The coating should not be sticky or show delamination |
