Boosting Voltage for Refrigeration Compressor in Mobile Unit

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SUMMARY

The discussion focuses on the challenges of operating a refrigeration compressor rated at 208/230V in a mobile unit where supply voltage can fluctuate. A step-up transformer is proposed as a solution to mitigate efficiency loss and overheating when voltage drops below 208V. It is established that the transformer will amplify any input voltage, potentially leading to saturation if the input exceeds safe levels. Recommendations include using thicker gauge supply lines to reduce voltage drop and ensuring the transformer is only used when necessary.

PREREQUISITES
  • Understanding of refrigeration compressor specifications and operation
  • Knowledge of electrical transformers and their functions
  • Familiarity with voltage drop concepts in electrical supply lines
  • Basic electrical safety and installation practices
NEXT STEPS
  • Research the specifications and installation guidelines for step-up transformers
  • Learn about voltage drop calculations and how to mitigate them in electrical systems
  • Explore the effects of transformer saturation and how to prevent it
  • Investigate thicker gauge wire options and their impact on electrical efficiency
USEFUL FOR

This discussion is beneficial for electrical engineers, refrigeration technicians, and anyone involved in the design or maintenance of mobile refrigeration units facing voltage supply issues.

Gwhaarmann
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I have a regrigeration compressor that is rated 208/230V This application is in a mobile unit so supply voltage will vary depending upon what is available.. when the supply voltage drops below 208v ( due to long supply lines) the compressor heats up at times and becomes less efficient ( at times even stopping due to internal protection). I would like to install a step-up transformer to correct this situation.
My question is, when the supply voltage IS high enough (208-230) will this affect the transformer?
 
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Yes. it would.
Step up transformer will not know what the input voltage is. It will step up whatever you feed it.
You should use the step up only if you are sure the voltage will drop below 208v.
 
I would use thicker gauge supply line. How long is it, and what is the power rating of compressor?

And yes that would. Suppose your transformer steps up from 200 to 220 , i.e. by 10% . At 220, it will step up to 242 , furthermore, it is possible for it to saturate if increase in voltage is too big.
 

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