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New RV Transformers

PostPosted: Sun Jul 20, 2014 2:09 pm
by Neil Mckay
Hi All,

We had a burnt out transformer that happened halfway down in France and cost 2 arms and one leg to fix. I will never know if it was dodgy electrics on a site, reverse polarity or me being a numpty in trying to draw too much power with too many things on (iron, kettle, water heater etc). The outcome was that we had sparks flying around in the transformer and the chocky box and transformer coils melted. The transformer was in the locker under our bed and under the engine LPG tanks (very dangerous).

We have also had experienced some questionable electrics on camp sites in the last 12 months, reverse polarity, no earth etc and to avoid any more electrical issues I decided to bite the bullet and have one of the new RV transformer fitted.

I decided to have it re sited in a locker on the far side of the RV, mainly to distribute the weight more evenly, I have a tool box,on the opposite side, that gets heavier each week, so the weight is more evenly distributed .
It was installed very quickly and was wired so the EHU goes directly to transformer with the 240v wired separately with it's only small consumer unit for the six 240v sockets that we use to recharge phones, I Pads etc. The features this new unit has are numerous but to mention a few. It has a display on the transformer that shows voltage in, the voltage out, it gives about 120v consistently, is shows the amps being used plus , It can detect and automatically correct any polarity issues, it has an automatic reset if the voltage from the camp site exceeds or drops dramatically and will also auto reset if you overload it by running too much stuff. (No more, hopefully running to the back of RV to check which switch has tripped or in the rain to fix the EHU point.

Another point worth mentioning is that our air conditioning and microwave have never worked so well.

I am totally satisfied with this purchased and would have no issue recommending this to others.

Re: New RV Transformers

PostPosted: Tue Aug 12, 2014 9:31 am
by Neil Mckay
Hi,

I thought I would just give an update on the new transformer.

We have had ours up and running for just under a month now. We have the 30amp version, which is the lower price option and it works fine. The 120v appliances all work better now, the microwave sounds quieter and I guess more efficiently, the air conditioning is fine too. It also has a built in trip reboot. In my case where I had too much stuff on, it tripped the electrics, it gives you a few seconds to turn something off and then automatically re sets itself. In our case no more trips outside to manually reset our electrics. It won't reset the site EHU though, mores the pity.
We had our microwave go belly up, I don't know if it was anything to do with the difference in hertz and that has caused the ongoing damage, I am no expert on anything electrical. I just feel more comfortable with a piece of kit that does what it says on the tin.

Re: New RV Transformers

PostPosted: Wed Aug 13, 2014 6:53 am
by Groundhog
Interesting topic.

Does this new piece of kit have a name you can share with us as well as an indication of cost and competent supplier/installer.

Thanks

Re: New RV Transformers

PostPosted: Wed Aug 13, 2014 7:46 am
by micknpat
Groundhog wrote:Interesting topic.

Does this new piece of kit have a name you can share with us as well as an indication of cost and competent supplier/installer.

Thanks


Think it's a secret?? Image

Re: New RV Transformers

PostPosted: Wed Aug 13, 2014 8:47 am
by Neil Mckay
Hi

This is the link:

http://www.rvtransformers.com/

Mine cost £1,450 plus VAT plus fitting.

The people who installed mine were Mercury ARC, Conyer, Kent.

Glenn of RV transformers will put you in touch of a supplier and fitter nearer to where you are.

His e mail address is: glenn@rvtransformers.com

Hope this helps.

Hope this helps.

Re: New RV Transformers

PostPosted: Tue Aug 19, 2014 7:50 pm
by Trekkin
How do you get on with the noise

Working with industrial electronics you can hear and identify an inverter controlled motor from 100 yards, and while walking around Malvern over the weekend I heard the distinctive high pitched whine long before I saw their stall. (I did not even know they were there but curiosity got the better of me and like a bus mans holiday I had to find the source)

This is caused by the IGBT carrier frequency and usually sits in the 4-20kHz range, right in the audible range. (Depending on your age, just a fact of life you loose the higher frequencies as you get older) and current technology cannot get rid of.

There will probably be the same whine/whistle from an inverter type suitcase generator but masked by the engine noise.

Sure any motor driven applications will run better, aircon and microwave are the only two, but does it make any difference to other electric devices that are voltage/frequency independent ?

Is this noise audible in the RV as it does tend to travel well and through walls etc. or have they completely soundproofed the area. Although generates slightly less heat than a transformer it can play havoc with some hearing aids.

Interested ?

Re: New RV Transformers

PostPosted: Tue Aug 19, 2014 8:34 pm
by Neil Mckay
Hi

Most of the technical comments made on this latest post go over my head.However I can answer most of the questions.

I do wear hearing aids but my wife can hear a penny hit the floor at 100 paces and the promise of a new pair of shoes whispered at 200 yards away. We recently had cause to use the sofa bed which is directly over the locker that has the transformer and we had no noise at all.

All our main electrical appliances work off 120v. The Tv;s, the microwave, electric kettle, electrical iron, the hairdryer, the toaster and the water heater. The 120v and 240 v are completely separate circuits. We still have to watch how much stuff we run depending EHU site electrics.

We only use 240v for charging phones, cameras etc.

There is no soundproofing at all in the locker, we have a 2002 Thor Hurricane that has the smaller lockers.

Incidentally my piece of kit is a transformer not an inverter and my hearing aids aren't affected at all.

As mentioned in a previous post we had suffered reverse polarity issues and a brown out too. We were fortunate that the transformer was thoroughly encased so the sparks when it went belly up didn't cause any damage. (The transformer was directly below the LPG Engine gas tanks) In the end, like an insurance policy, I decided to have it installed just so we felt comfortable and safer. As I have said, we have insurance hoping we never need it and I treated this piece of kit in the same way. I might never have had a problem with the old transformer (I did) but this piece of kit prevents these potential problems happening.

Every one has to make their own call.

I hope this helps.

Re: New RV Transformers

PostPosted: Tue Aug 19, 2014 9:04 pm
by Trekkin
Great feedback

Thanks

Re: New RV Transformers

PostPosted: Wed Oct 01, 2014 4:48 pm
by Neil Mckay
Hi

I started this thread and whilst there seems to be some issues with Mercury and the suppliers, hence the post by Mercury, I still have the new transformer running and after the fan modification we have had we seem to have no problems to date. (4 months to date). The fan does run constantly, but quietly, we are in sunny and warm Spain.

Regards

Neil

Re: New RV Transformers

PostPosted: Thu Oct 23, 2014 7:53 am
by BBHOW
We are thinking about changing our transformer and have read your comments.

Do you know what will happen when the fan stops ? because clearly the fan is working too hard ,the cooling fans that we have on our

yacht electrical equipment do not run all the time even in the hottest weather.