Elbow Arrestors Vs. Load Break Elbows in Pad Mounted Tra

[eee]

I have an issue of deciding whether to install elbow arrestors in addition to my present load break elbows that are already in my design for my pad mounted transformer enclosure. I must install a second ground rod if I install the elbow arrestors since I am not installing a ground loop or counterpoise (in that I am grounding my concentric nuetral, XLP cable everywhere is the reason I do not need the ground loop or counterpoise). This is my understanding.

I should refer to a tech rep for transformers and probably will, but thought I would ask the forum if the elbow arrestors are the same thing as the load break elbows in the pad mounted transformer enclosure?

 

[eee]

Re: Elbow Arrestors Vs. Load Break Elbows in Pad Mounted Tra

My common sense would dictate that the elbow arrestor in the pad mounted transformer enclosure is a lighting arrestor, hence the requirement for a second ground. I know from past learning that there are dead front and live front load break elbows. Therefore, load break elbows must be for breaking the load, much like the cut-outs on the top of the utility pole.

Also I could probably save money and get by without the elbow arrestors in my pad mounted transformer enclosure if I already have a lighting arrestor installed with my cut-outs on top of the utility pole.

 

[mario]

Re: Elbow Arrestors Vs. Load Break Elbows in Pad Mounted Tra

Yo Paison, haven't you noticed that there are a few here who have a problem with your questions ???

By the way ... It's ""LIGHTNING"" ... You know that stuff that is usually associated with Rain Storms ...

 

[eeee]

Re: Elbow Arrestors Vs. Load Break Elbows in Pad Mounted Tra

OK Mario, I thought there was no such thing as a stupid question I was tought in college, both masters and bachelors in EE. I have been in this particular field for 1 year and no, I do not have any EE or electrician professionals to help me here. The review department here has no mercy on faulty designs that I submit I learned the hard way.

As Charlie says the forum is here only to assist, not to teach and I do applogize.

I will refrain from teaching questions and I appologize again. I do appreciate the assistance and your time as I know you did not have to expend the energy to read and answer my thread.

The lighting, not lightning was a simple typo.

 

[jim dungar]

Re: Elbow Arrestors Vs. Load Break Elbows in Pad Mounted Tra

eee,

I did not see a clear question in either of your two postings.

After re-reading your first post, I see you asked if load break elbows and elbow arrestors are the same thing. The simple engineering answer is "kind of".

A load break elbow is a method for making a deadfront connection to a transformer. If you want to maintain a dead front then your lightning arrestor needs to be connected using a load break elbow.

 

[bdarnell]

Re: Elbow Arrestors Vs. Load Break Elbows in Pad Mounted Tra

Originally posted by eee:
I should refer to a tech rep for transformers and probably will, but thought I would ask the forum if the elbow arrestors are the same thing as the load break elbows in the pad mounted transformer enclosure?

Elbow arrestors can be supplied as either dead break or load break, depending on your application.

I understand that you do not have a lot of guidance on the design of this system, but please be aware that designing a medium voltage system based on questions and answers in this forum would not be recommended by anyone here. I urge you to seek the services of a practicing professional engineer who specializes or at least has extensive experience in this field.

That having been said, see the link below for info on the elbows in question.

http://www.tnb.com/pubint/docs/elastimold_surge.pdf

 

[charlie]

Re: Elbow Arrestors Vs. Load Break Elbows in Pad Mounted Tra

You might find the services of one of the electrical designers from the local electric utility would be very helpful. Find someone who does URD design to help you with the layout and material choices.