Smoke is visible or smelled
Smoke normally means the tranformer’s insulation has been damaged or weakened and failure could have already occurred. The transformer must be immediately deenergized to prevent further damage.
| Check: | Solution: |
|---|---|
| Visible signs of damaged or failed insulation. | The transformer will have to be sent back to the factory for testing and possible repair or replacement. In many cases, it may not be economically possible to repair a damaged tranformer and the unit will have to be replaced. |
| No visible signs of damage. | The transform should be meggered. If the insulation values are lower than required (consult the maintenance manual), the transformer will have to be sent back to the factory for testing and possible repair or replacement. In many cases, it may not be economically possible to repair a damaged transformer and the unit will have to be replaced. |
| No visible signs of damage. | Check vertical air ducts in the transformer. If any metallic ferrous metal (screws, nuts, washers, etc.) have fallen between the transformer coils, these will heat through eddy currents and cause insulation damage and eventual failure. |
| No visible signs of damage. | The transform should be meggered. If the insulation values are within the required range and if the transformer was just manufactured (consult the maintenance manual), the transformer may have some insulation that was not cured during the bake cycle. Please call HPS for further instructions. |