Oil Transformer Partial Health Index
When oil transformer is fitted with an ETE sensor, specific online monitoring is enabled. Additional analytics are received from ETE application (cloud-to-cloud integration) and are displayed on Advanced Monitoring tab.
For oil transformer asset type, the partial health index (PHI) calculation takes into account the Aging index received from ETE technical device for the following indicators:
-
Health index oil calendar aging
-
Health index winding insulation aging
PHI calculation and ETE application run compatible assessments.
The following table illustrates the adjusted values displayed after aging indexes from ETE device are taken into account. For example, for a given asset, if PHI for winding insulation aging is scored 3 by the EAA web portal, while Aging index received from ETE application is 4, the result displayed is 4 (value indicated in the following table, at the intersection of column 3 and row 4).
| PHI | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| ETE | |||||
|
1 |
1 |
2 |
3 |
4 |
5 |
|
2 |
1 |
2 |
3 |
4 |
5 |
|
3 |
1 |
2 |
3 |
4 |
5 |
|
4 |
2 |
3 |
4 |
5 |
5 |
|
5 |
2 |
3 |
4 |
5 |
5 |