Hughes Autoformer

[Kevin D Pem]

Have another look at the recommendations:
View attachment 20307

so I find most equipment failures are due to focus on one line!
The part of the line you highlighted I find most telling is "although NOT preferred "! I focused In on the line further down where it talks about little holes. Then further down where it talks about "as designed "(my words).

In my book the line you highlighted says! If it's a deal breaker, we have a last ditch installation option, but we really would "prefer" you not use it.

This may be the reason I seldom had failures in my installs, but maybe I just got lucky!!!

 

[DrPhil]

so I find most equipment failures are due to focus on one line!
The part of the line you highlighted I find most telling is "although NOT preferred "! I focused In on the line further down where it talks about little holes. Then further down where it talks about "as designed "(my words).

In my book the line you highlighted says! If it's a deal breaker, we have a last ditch installation option, but we really would "prefer" you not use it.

This may be the reason I seldom had failures in my installs, but maybe I just got lucky!!!

I didn't realize you were speaking from experience or observation. Apologies. Now I am concerned that I've made a mistake in my installation, therefore I am very interested to hear more details about the failures you've observed with Hughes Autoformers laying on their sides in protected, climate controlled compartments. What happened in these events? Did they just quit working or were there more problematic demises?

 

[Kevin D Pem]

I didn't realize you were speaking from experience or observation. Apologies. Now I am concerned that I've made a mistake in my installation, therefore I am very interested to hear more details about the failures you've observed with Hughes Autoformers laying on their sides in protected, climate controlled compartments. What happened in these events? Did they just quit working or were there more problematic demises?

That statement I made is generalized! Most installations fail when we say it will work but. Most boost transformer I have had anything to do with, are in control rooms, adjustable, and open frame. Most quality outdoor transformers are potted where condensate is not a problem.

It appears from past research that there is voltage sense circuit in the box, and that tells me they need to worry about water.

Your installation will work, looks great, I frequently post warnings of possible issues so people go in with both eyes open!!! Not to detract from one's handiwork.

 

[Tnedator]

What about the "ventilated" compartment requirement? How ventilated does the compartment need to be?

 

[Kevin D Pem]

If the transformer is 99.5% efficient, at full capacity the heat dissipate would be 550watts. Depending on the wall treatment, and any insulation, you could calculate worst case scenario. Forced air vs convective transfer would determine vent size.

I would look for factory recommendations.

 

[Richpatty]

I have seen many folks put the Autoformer in the electrical bay without any issues, so it must not be a big heat generator…

 

[Kevin D Pem]

I have seen many folks put the Autoformer in the electrical bay without any issues, so it must not be a big heat generator…

When you calculate losses because energy is converted to another form, what do you think the energy converts to???

That said, I do correct my calculations, seems I was off on efficiency per this link.

Transformer - Losses and Efficiency

In any electrical machine, 'loss' can be defined as the difference between input power and output power. Losses in transformer are explained below - Just like any other electrical machine, efficiency of a transformer can be defined as the output power divided by the input power. That is...

www.electricaleasy.com

 

[Richpatty]

I was just saying that it has not appeared to be a problem with others.

 

[Kevin D Pem]

I was just saying that it has not appeared to be a problem with others.

I agree that it has not been an issue for most. This year has been a torch and has shown flaws hidden till now. Just saying!

 

[Richpatty]

I agree that it has not been an issue for most. This year has been a torch and has shown flaws hidden till now. Just saying!

Flaws? Such as? With the Autoformer? Do you have an Autoformer?