Delta 3phase required?

alixenos

Member
Location
Florida
Occupation
Electrical Design Engineer
Hello,

I'm trying to power a machine which has the following specs
1711649275037.png


Does it matter if I provide 3 phase Y configuration to power it?

thanks
 

synchro

Senior Member
Location
Chicago, IL
Occupation
EE
Delta, 3L is describing the 3-wire loads that the machine presents to the source of power.
A 3-phase wye supply would be completely appropriate in this case, you just don't need the neutral.
 

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
+ some equipment, especially when drives are involved, doesn't play well with Delta systems...hopefully u have eye available
 

Jraef

Moderator, OTD
Staff member
Location
San Francisco Bay Area, CA, USA
Occupation
Electrical Engineer
I agree. I think this is denoting a form of ignorance in that they are trying to let you know that their machine doesn’t NEED a neutral. The fact that the neutral exists at the source transformer is irrelevant. They just misinterpreted that as being the same as “delta”. The proper way to put that is “3 phase 3 wire + ground”, no need to reference if that is derived from a delta or wye source.

This is how 99% of MCCs are denoted, because motors (almost **) never need a neutral.

** I added “almost” because if I said “never”, someone would prove me wrong with some bizarre exception…
 
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