240 device in 208/120 panel

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nolabama

nolabama

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new orleans la
We are setting a machine for customer that requires 240vac 4 wire - service is 208/120 - machine is a currency counter - Foreman say's it wont work - Master says its fine - what do you guys think -
 
nolabama said:
We are setting a machine for customer that requires 240vac 4 wire - service is 208/120 - machine is a currency counter - Foreman say's it wont work - Master says its fine - what do you guys think -
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My guess is that "240vac 4 wire" means 120/240 1ph + EGC.

If the nameplate does not include 208v, you will need to boost the voltage.

Two questions, just to be sure:

1. Single phase or three phase?

2. Does the machine require a neutral?
 
single phase machine - yes it requires a neutral - two hots neutral and egc
tech data is very specific - machine can be set up for 220vac 230vac or 240vac
oh and i forgot to mention the machine costs $125,000
 
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You're not gonna get 120/240 from 208/120 with a single autotransformer. You'd have to boost 104v to 120v . . . twice.

This might be a case where a single 208-to-120/240v transformer is better than two autotransformers.
 
Because it's easy to presume that, to most loads, the difference between 240 and 208 is easily within tolerances. Apparently, the knowledge isn't that common.

But with a machine that costs $125,000, has 220/230/240v taps or settings, costs $125,000, requires a neutral, and costs $125,000, you don't even think about making such expensive presumptions.

Oh, did I mention that this machine costs $125,000? :cool:
 
LarryFine said:
Because it's easy to presume that, to most loads, the difference between 240 and 208 is easily within tolerances. Apparently, the knowledge isn't that common.

But with a machine that costs $125,000, has 220/230/240v taps or settings, costs $125,000, requires a neutral, and costs $125,000, you don't even think about making such expensive presumptions.

Oh, did I mention that this machine costs $125,000? :cool:
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Larry is totally right. The machine costs $125,000! For the price ($100-$200-$300) of a little xfmr against the price of a machine that costs $125,000.

We just did a big printer and had the VP of Ops double check with whether 208V was close enough. Manufacturer said nope. Installed a Xfmr.

Please let us know what happens. :grin:
 
looks like we get a deliberate callback in a month - no one is to clear at toshiba tech and were following engineer drawings - toshiba asked for a 240vac with no netural -OS is windows based with lan interface and a touch screen -
 
we will see sir - by the way have you ever been in a vault that has a need to count, sort, face, stack, and band $750,000 in one hour with one machine - unbelivable securtity - i cant even take the spec sheet out of the building
 
recieved callback today from GC he wanted us there when unit went in - machine worked fine no problems toshiba rep pluged it in an all is well :smile:
 
Ran into this problem a while back with a tanning bed of all things, called the manufacture and they insisted it had to be within the 220-V range. I ended up using a buck-boost and came out with V. Everything went fine.
 
nolabama said:
recieved callback today from GC he wanted us there when unit went in - machine worked fine no problems toshiba rep pluged it in an all is well :smile:
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It might work now, but next summer when your 208 Volts is down around 193 Volts, they might start having problems.
Depends on what's inside.
good luck
db
 
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