Single Phase 208V-230V

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benji93

Member
Location
NC
Occupation
Maintenance
I've got a chiller unit that is rated for 208v-230V single phase. I believe the previous owner was running two single leg 120V's to this though. Would that not over time destroy (potentially) some of the components? I realize this makes a 230/240V (depending on phase differences) single phase, but I always thought if it was clearly labeled single phase, it should stay "true" single phase.
Any insight? Thanks guys.
 
benji93 said:
I've got a chiller unit that is rated for 208v-230V single phase. I believe the previous owner was running two single leg 120V's to this though. Would that not over time destroy (potentially) some of the components? I realize this makes a 230/240V (depending on phase differences) single phase, but I always thought if it was clearly labeled single phase, it should stay "true" single phase.
Any insight? Thanks guys.
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I would contact your electrician and have that fake single phase checked out for sure!
 
fastline said:
I would contact your electrician and have that fake single phase checked out for sure!
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Its currently sitting at my place of work disconnected. The two remnant legs running to it are 10g black, hence the assumption of two 120v legs vice a true 230V single phase leg.
 
Ok, I have to go back to post #2, do you have a plant electrician? Not trying to be condescending but it appears as though you don't understand the way 208 or 240 is derived.
 
roger said:
Ok, I have to go back to post #2, do you have a plant electrician? Not trying to be condescending but it appears as though you don't understand the way 208 or 240 is derived.
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I feel I have a decent understanding.
Two 120V legs make 208 or 230/240 depending on the transformer configuration.
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What part of my question did this answer?
 
benji93 said:
I've got a chiller unit that is rated for 208v-230V single phase. I believe the previous owner was running two single leg 120V's to this though. Would that not over time destroy (potentially) some of the components? I realize this makes a 230/240V (depending on phase differences) single phase, but I always thought if it was clearly labeled single phase, it should stay "true" single phase.
Any insight? Thanks guys.
Click to expand...
The only thing that matters to your unit is that it is fed with enough voltage. L1 and L2 from a 208V wye or a 240V delta three phase, or a 240V single phase doesn't matter. Nothing in that unit can calculate a phase angle.
 
ActionDave said:
The only thing that matters to your unit is that it is fed with enough voltage. L1 and L2 from a 208V wye or a 240V delta three phase, or a 240V single phase doesn't matter. Nothing in that unit can calculate a phase angle.
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Thank you for the reply!
 
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