Dear Sirs,
Are there available any sources which give any recommendations when plant power supply can be considered as an reliable.
For example: we have two Main Supply Points, each is supplied from: a) Local Power Plant external power supplier . Each refinery plant is supplied from two Local Supply Points which are fed from both Main Supply Points.
For a few most critical plants we have also third power supply from third, another, Local Supply Point, but still fed from two Main Supply Points , mentioned before.
Is this third power supply can be considered as an reliable?
Any help will be appreciated.
Best regards.