Transformer Capacity Remaining

GA Lyn...

WPyles,

Since you do not appear to have a basic understanding of how to work out Maximum Demand for your plant or current Operational loading, it would be in your best interest and everyone elses at the plant if you followed Lyn's advice.

Regards,
Sapper

@lyn agreed!

@wpyles dude learn some good on the subject first, try to understand the one line diagram. don't mess with electricity unless you are dead sure of what you are doing!

Poor guy.

Have we heard of transformer blows due to overload?

Most power transformer has overtemperature protection(which may also caused by overload) .

It would be helpful if your transformer feeder has load recording facility, therefore you could see the pattern of loadings in the past (week? month?). Or may be you can do this manually over acceptable interval and period.

Otherwise, you may have to figure it out again from the SLDs by factoring normally connected loads, intermittent and stand-by loads, and factor them according to your project standard, or other guidelines relevant to your project spec.

Also beware if the transformer is 2x100%, or 1x100% operation.

You won't do it by tracing the reticulation. This is good to do as part of due diligence but won't tell you anything about or quantify the actual extant loading.

Measure the current and voltage in each phase of the transformer output before it is branched off. I doubt they are single phase.

Monitoring equipment is best used for this to capture transient and short duty cycle loading.

As "the guy in charge", make hiring an electrical engineering consultant the first thing you do as part of the expansion project.

Follow the other good advice already tabled.