Is anyone aware of any actual standard(s) that cover the requirement, if any, of installing blast walls between two or more substation transformers? I'm looking for specs re. minimum distances before they are required and/or recommended. If they are required, what sort of force/overpressure must...
I am in the process of replacing and upgrading the supply transformer for a small utility of 3000 customers.
The source is 44kV delta, and the existing transformer steps down the voltage via a delta-delta connection to supply a three-wire medium voltage (26.4kV) subtransmission system.
My...
We are having a bit of a debate in my local group of utilities regarding where lightning arrestors should be placed wrt disconnect switches on radial disitrbution systems.
We all agree that the lead lengths (both 'hot' and 'ground') need to be kept to a minimum wrt the equipment being...
After consulting with two supppliers and getting three answers, I thought I'd ask the board here:
What is the recommended practice for sizing lightning arrestors for 3-wire overhead and underground distribution systems? The two voltages I have to address are 4800V?, and 26.4kV?.
I have been...
I work for a electric utility.
We have just had at least 2 occurances of severe corrosion and pinholes in copper water lines supplying residential homes in a rural subdivision that is less thna two years old.
There is a local central water system using PVC pipes for their mains, and copper...
I am planning to purchase a new three-phase and/or a new single-phase relay tester to replace our old 'dinosaur' single-phase Multi-Amp unit.
I was curious was everyone else is using, and what they thought of them.
I am particularly interested in hearing from those who purchased a 'modern'...
