3phaseMarty
Member
- Location
- Quebec, Canada
Hi,
I'm helping a business purchase and install an auger filler machine.
They're in a building with 120/208 3 phase provided, and are currently have a setup with 120 & a 240 option - on these 2 leg circuits line to neutral measures 125, but between two lines reads 217 as the two legs are 120 degrees out of phase. They don't have the 3 legs set up for 3-phase on anything.
They want to install a machine requiring on 240 V, 3 phase, but don't want to have the electrical work done to connect the 3rd leg. Instead, they want to convert the electricity up with a 240 1 to 3 phase transformer, even though their electricity is actually provided on 2 legs of a 3 phase system. They don't want to do electrical work on the building to put them on their existing 3-phase, believing the manufacturer's claim they can use a transformer to provide the 3 phase.
Two questions:
-I'm looking to be confirmed in the following: Installing a 1 to 3 phase transformer won't work as they wouldn't be cleanly converting 1 phase to 3, but 2 out of sync ones. If anything they should install the 3rd leg into their existing 3 phase system and boost the voltage if necessary. Is my understanding correct? Does their solution actually work? Has anyone had a similar situation to this?
-Is there a simple way to explain to a customer what's going on with 2 out of 3 legs of 3 phase? The bicycle analogy is all I have here.
Nice to be on the forum!
Thanks,
Marty
I'm helping a business purchase and install an auger filler machine.
They're in a building with 120/208 3 phase provided, and are currently have a setup with 120 & a 240 option - on these 2 leg circuits line to neutral measures 125, but between two lines reads 217 as the two legs are 120 degrees out of phase. They don't have the 3 legs set up for 3-phase on anything.
They want to install a machine requiring on 240 V, 3 phase, but don't want to have the electrical work done to connect the 3rd leg. Instead, they want to convert the electricity up with a 240 1 to 3 phase transformer, even though their electricity is actually provided on 2 legs of a 3 phase system. They don't want to do electrical work on the building to put them on their existing 3-phase, believing the manufacturer's claim they can use a transformer to provide the 3 phase.
Two questions:
-I'm looking to be confirmed in the following: Installing a 1 to 3 phase transformer won't work as they wouldn't be cleanly converting 1 phase to 3, but 2 out of sync ones. If anything they should install the 3rd leg into their existing 3 phase system and boost the voltage if necessary. Is my understanding correct? Does their solution actually work? Has anyone had a similar situation to this?
-Is there a simple way to explain to a customer what's going on with 2 out of 3 legs of 3 phase? The bicycle analogy is all I have here.
Nice to be on the forum!
Thanks,
Marty