When You Need It
- · The circuit has a distinct daily shape, which is normal for solar and for storage
- · You want to know whether a smaller conductor is defensible before committing to the larger one
- · An emergency or N-1 condition puts a cable above its continuous rating and you need to know for how long that is acceptable
- · A client or DNO has questioned a rating based on a load factor
Standards Applied
The report states the clause and the edition it works to, so the calculation can be reproduced by whoever reviews it.
What You Get
Small firms rarely offer this, and it is often where a conductor size is won or an N-1 argument is settled. It sits on top of the IEC 60287 model, so it is quick once the steady state case exists.
Frequently Asked Questions
What load shape do you use if we do not have one?
We will propose one appropriate to the technology and state it plainly in the report, so anyone reviewing it can see exactly what was assumed and challenge it if they disagree.
Can a cyclic rating be used for the DNO submission?
Often yes, but it depends on the operator and on how firmly the load shape can be relied on. We will tell you where the argument is strong and where it is not.
The Rest of the Cable Chain
Review, calculation, drawings, testing and fault location, from one place. See the whole picture.