Hello

The attached file is for the wiring of a residential elevator. I bought my 30 amp breaker, 75 ft of 10 ga romex and wired 240 volts to my 6-30 p plug. The person who is going to install the elevator hands me a box and says it's a buck boost and I'll know what to do with it! Well I don't. It looks like a transformer, it has 8 wires X1 through X4 and H1 through H4. Does it go just before the 6-30 p plug?

 

Normally a buck-boost transformer uses the secondary in series with a AC supply to either lower (buck) or raise (boost) the secondary or supply voltage by the secondary value

 

It will be used to correct your supply to meet the equipment requirements. Some enlightening connection info on this datasheet:

https://library.e.abb.com/public/23...ost+datasheet+1TQC1932E0004_REVC+JAN+2021.pdf

 

It will be used to correct your supply to meet the equipment requirements. Some enlightening connection info on this datasheet:

https://library.e.abb.com/public/23...ost+datasheet+1TQC1932E0004_REVC+JAN+2021.pdf

The installer sent me this but he said he is no electrician. Could you tell me where is L1 and L2 and where the plug would go?

 

Dwg

 

The dwg is not up loading

 

Try again

 

Since I see not one word of description as to what voltages the TS has available, I am guessing that they are in the US, and getting power from the USA electrical grid. In that case, the available voltage at the TS power distribution panel, (Breaker Box) is probably in the 220 to 240 volt range. So, in that case why would a transformer be required?? In addition, if the actual system consumes anything close to 30 amps, or even 20 amps, at 240 volts, 20X240 =4800 watts, nobody is going to "Hand You" that transformer, because a 4800 watt transformer will weigh over 20 pounds, at least.

PLease let us know if your residence where this elevator is installed is equipped with a standard electrical service, which might require the addition of a dual breaker or another separate service box.
It seems that the installer has much less electrical knowledge than the average cat.

 

The requirement sheet says 220-240V 30A is acceptable, and you've got 240V, so if it can supply 30A then in theory you don't need a transformer. It says 220V is nominal so maybe the guy expects you to buck your 240 down to 220, but on paper there's no requirement for that. Did you ask him WHY he thinks you need a transformer?

Please please have the final wiring at least OK'd by a professional. Elevators can be deadly. Several years ago an elderly couple was trapped in their elevator when it got stuck between floors, they had no phone with them and no one knew they were there, and they died in the elevator.

 

Since I see not one word of description as to what voltages the TS has available, I am guessing that they are in the US, and getting power from the USA electrical grid. In that case, the available voltage at the TS power distribution panel, (Breaker Box) is probably in the 220 to 240 volt range. So, in that case why would a transformer be required?? In addition, if the actual system consumes anything close to 30 amps, or even 20 amps, at 240 volts, 20X240 =4800 watts, nobody is going to "Hand You" that transformer, because a 4800 watt transformer will weigh over 20 pounds, at least.

PLease let us know if your residence where this elevator is installed is equipped with a standard electrical service, which might require the addition of a dual breaker or another separate service box.
It seems that the installer has much less electrical knowledge than the average cat.

Hello MB2, the house has 248.2 volts ac 1 phase. The first attachment says they'll accept something between 220 vac and 240 vac. My guess is they want me to step down from the 248.2 vac. The installer said it could burn out the elevator's control board for what that's worth. So I was just looking to wire this thing I guess in buck mode and step that 248.2 down to 230 ish? So from my dbl pole breaker does L1 and L2 go to H4 and X1. And do I connect H4 and H1 to the receptacle blades?

Thanks

 

The requirement sheet says 220-240V 30A is acceptable, and you've got 240V, so if it can supply 30A then in theory you don't need a transformer. It says 220V is nominal so maybe the guy expects you to buck your 240 down to 220, but on paper there's no requirement for that. Did you ask him WHY he thinks you need a transformer?

Please please have the final wiring at least OK'd by a professional. Elevators can be deadly. Several years aagoan elderly couple was trapped in their elevator when it got stuck between floors, they had no phone with them and no one knew they were there, and they died in the elevator.

I wanted to ask him that same question but maybe the 248.2 is just too high. A local three electrician will check my work when I am done. And they are making me put a phone line he told me some law requires a phone in every elevator in the country. Thank you

 

Since I see not one word of description as to what voltages the TS has available, I am guessing that they are in the US, and getting power from the USA electrical grid. In that case, the available voltage at the TS power distribution panel, (Breaker Box) is probably in the 220 to 240 volt range. So, in that case why would a transformer be required?? In addition, if the actual system consumes anything close to 30 amps, or even 20 amps, at 240 volts, 20X240 =4800 watts, nobody is going to "Hand You" that transformer, because a 4800 watt transformer will weigh over 20 pounds, at least.

PLease let us know if your residence where this elevator is installed is equipped with a standard electrical service, which might require the addition of a dual breaker or another separate service box.
It seems that the installer has much less electrical knowledge than the average cat.

Also Mr Bill too, the installer just does the mechanical in store. My parents opted to save $2,500 by us handling the wiring. This thing does way about 20 lbs. But am I right about the wiring connections for l1 and l2

 

Ahhh finally I get it. Assuming you're correct that the guy wants you to buck your 248 to something between 220-240: for 30A you would need transformer part# K1XGF12-0.75. If you only need ~20A then you can get away with K1XGF12-0.5.

After some digging, these transformers can be used as either step-up/step-down isolation transformers, OR buck/boost when wired as autotransformers. The graphic below shows the autotransformer wiring. More info here.

Someone feel free to double check me on this.

 

A little different to what I am used to using as buck/boost, that to me is just as an auto-transformer, i.e. transformer with no isolation.

 

A little different to what I am used to using as buck/boost, that to me is just as an auto-transformer, i.e. transformer with no isolation.

The terminology threw me off too, but it seems to be industry standard.

 

Good News, Max, no need for isolation when just adjusting the voltage a bit.
NOW as fro 248.2 volts, contact your electrical utility and ask them to adjust it. Certainly that is possible, and would make a lot of sense. And probably it would be free. And that transformer cost quite a bit if it is of any good quality. AND, as it will be powered full time, it will burn a whole lot of electricity.

 

Sometimes a picture is worth 999 words.
I have some of these transformers where you can set the tap off point for the secondary.

 

Sometimes a picture is worth 999 words.
I have some of these transformers where you can set the tap off point for the secondary.
View attachment 337408

AKA a Superior Electric Powerstat!

 

AKA a Superior Electric Powerstat!

AKA a Variac !
https://variac.com/staco_Variable_Transformer_Map.htm?msclkid=8277c0f475901268238fa7a58966b871

 

We really need the TS to be a little clearer as 248.2 sounds like he measured with a meter and one wonders RMS or P-P, etc.
So let's start simple:
What country are you in?
If US, what state?
Who is your power company?

And how about info on the elevator? I see refererence to "The Cube"
Is this it?
https://www.transitionsmobility.com/node/774

This elevator is made in Florida and if you are installing in the US I doubt you need anything like a transformer.
PVE uses 220VAC incorrectly as terms like 110/220 and 115/230 are older out-of-date terms. US is standardized 120/240.

US Power companies follow ANSI C84.1 for our service voltage deliveries which specify +/-5%.
Standard Minimum Maximum 120/240 min 114/228 max 126/252