Wow, that was bad.
Near the end of October I was shown a very poorly written Incident Energy Report. The reason that it was given to us, a competing consulting firm, was that we designed the system and on of the action items listed was regarding the size of the transformer protection. They said it was wrong, we checked and they were wrong.
For the record, the secondary circuit breaker of a transformer may be used for the transformer protection as long as it is no greater than 250% of the full load current of the transformer AND the up stream protection from the transformer is no greater than 600% that of the full load of the transformer.
We checked and we meet both of these requirements. Besides that, the breaker settings that we used, and they used in there report, were well within the transformer damage curves.
What’s this all about?
But that is NOT the reason I am writing this first entry, basically there are some things that every Incident Energy Report must include. Since this is more than can be covered in a single post I am going to write a 6 Part series explaining what I believe must be included in every IE Report.
The parts are:
- Part 1: Site Background Information and Scope
- Part 2: Description of the System
- Part 3: Short Circuit Information
- Part 4: Protection Coordination Information
- Part 5: Incident Energy Levels and associated Boundaries
- Part 6: Recommendations
Each one of these sections must be included in every report that you may write or receive from a consultant. If one is missing when a review report is issued ask why it is missing.
This is not to say that each section will have to be called out within the report, depending on the scope and size of the system they may be simply broken out into line items, but they must be included. However in this one report that I had viewed, this was not the case, and this is why I have decided to write this series of posts. I will be adding the posts through the months of January and February and will have a detailed summary post at the end.
