Transformer Help

Employ an electrician.

thank you.....

This comes under the category of if you have to ask this fundamental question then you are not qualified to do this work. Hire a licensed local electrician. They will already know the local wiring code to select and place all of the needed circuit protection and disconnects. They will also know how to test the output phases for proper operation sequence.

thank you....

thank you.....

Bravo Gary

I look forward to helping you understand and perform an electrical engineering task one day that won't possibly endanger you and others.

You are very welcome!

i am a residential guy, I have been on several commercial jobs.. as of this date i have never installed a stepup transformer. I would never attempt to install any type of equipment without the proper knowledge necessary.. as it could possibly hurt or kill someone. and not to mention that it could do costly damage to a customers system... I have worked with several emaster electricians during the installation process. none have taken the tim to explain the task of properly phasing a 3 phase system...

I not sure of your location but, it seems to me that most states and or governments, have some very strict rules when it comes to elevators. Especially when it comes to passenger carrying devices. Before I would place myself in legal jeopardy, I would surely investigate all legal ends 1st. Let alone, not knowing how to do a simple xformer wiring.

Investigate, before you get to far in over your head.

thank you

Your gracious acceptance of (and adaptation in response to) the criticism is commendable.

.

That is an impressive bias toward getting to the right answer at the expense of false ego insurance.

That is a quality few people have enough of..

thank you for your help!!!! i will be employing a master electrician to make necessary connections!!!!

garytheelectricman should become garytheelectricstudent before he becomes garythecrispycritter.

thank you

thanks lyn I appreciate the advice..... in our area it is difficult to get into the union unless you are friend or family. thus getting commercial and or industrial experience is difficult at best....

As advised by most of those who responded to you, it is better for your frined to employ the services of a licensed electrician instead of taking chances and putting his equipment and the life of whoever will dare to take the risk of installing the transformer. Now for the sake of education, H1, H2, H3 and H0 is the standard marking on the terminals of High Voltage side of the transformer (in your case the 480V). 1, 2, 3 refers to line 1, 2 and 3 respectively while 0 (H0) is the neutral point of a wye connected winding. x1, x2 and x3 is the low voltage terminal of your transformer (208V) and since there are only 3 terminals I believe the low voltage winding is connected delta. The electrician should connect the power cable (208V) phase A to x1, phase B to x2 and phase c to x3 of the transformer. he will then have to connect the H1 to phase A, H2 to phase B and H3 to phase C of the input power of his new elevator. If the new elevator has a neutral terminal, the electrician should wire H0 to the neutral terminal otherwise, he should connect the H0 to ground. The ground terminal of hte transformer should be wired to the system ground for personal protection. Regarding the taps, normall, it is factory set at the norminal voltage which is the 480V so I would suggest that the electrician should not change it immediately. He should change it only when the output voltage (in this case the 480V is below the required value) but make sure that the transformer is fully deeenrgize before he makes any change in the connection. Hope this will help you in assessing if your friend's electrician is doing the right job.

KISS, simple answer, do the right thing, hire an elevator company to fix the problem.

Elevators transport human bodies. You never ever take any chances on transporting humans. They could be your family going up or down in them. they must be safe.

Do not screw with elevators that carry humans.

Jim makes a good point....check that the new elevator has all the required certification to carry humans.

I can relate a little story where one stopped between floors but the passengers managed to open the doors and crawl through a gap about 1 foot wide...can you imagine what could happen if it started at that time. Chopped up hotel guests!

Better stay away from this, elevator companies are specialised in all the safety aspects not only electrical. Advise your friend that although you would like to help you could not risk being involved in any consequences of what seems to most of us as reckless behaviour and he should review his hotel guest insurance cover as well as the people who supplied and fitted his new elevator

i didn't read futher this "I want to install a stepup transformer for an elevator at my friends hotel."

in this instance you are the service provider and your friend is a customer of full value - you should keep it like this (in your mind) until your job sucessfully completed

there's too many stories about friends services /!\/!\/!\

Take a look at this web page:

http://www.elec-toolbox.com/usefulinfo/xfmr-3ph.htm