Chiller & UPS Power Connections

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dvcraven052256

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Location
St. Louis, missouri
Occupation
Electrical Engineer
I am working on relocation of lab equipment. Below is an excerpt from an email received relative to equipment connections required for a chiller and UPS unit. Given both are fed by e-pwr on normal circumstances, I'm unsure how the UPS feeds in the chiller.

  • Chiller #137A01 has a UPS backup
    • UPS resides on furniture dolly to allow ease of movement out of way for servicing rear of chiller
  • Chiller needs a e-pwr NEMA L15-30R on 208V 20A breaker
  • UPS needs a e-pwr NEMA 6-50R on 208V 50A breaker
 
dvcraven052256 said:
I am working on relocation of lab equipment. Below is an excerpt from an email received relative to equipment connections required for a chiller and UPS unit. Given both are fed by e-pwr on normal circumstances, I'm unsure how the UPS feeds in the chiller.

  • Chiller #137A01 has a UPS backup
    • UPS resides on furniture dolly to allow ease of movement out of way for servicing rear of chiller
  • Chiller needs a e-pwr NEMA L15-30R on 208V 20A breaker
  • UPS needs a e-pwr NEMA 6-50R on 208V 50A breaker
Click to expand...
With rubber cord connected to the
NEMA L15-30R in the UPS?
I'm assuming the chiller plugs into the ups.
 
At first I was "Funky setup, but when I was with Liebert/Emerson/Vertiv we'd also sometimes recommend an interposing transformer configuration like that on certain 1ph systems," but then... yeah... single phase UPS, three phase chiller, with no rotary MG or other phase-conversion gear in between? Something doesn't seem right about that spec.
 
Someone told you the wrong receptacles. Unless there are two power connections and the UPS is only serving certain parts of the chiller, which is not typical at all.
 
Sometimes the UPS also serves as a phase/frequency converter.

We did that for a project where we would put test hardware on an airplane. We used a double conversion UPS that would always output 120V 60Hz, but could accept input from 50-400Hz.
 
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