Problem running 220volt motor on local electricity supply

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Discussion Overview

The discussion revolves around the challenges of operating 220V motors on a local electricity supply of 415V. Participants explore potential solutions, technical clarifications, and the implications of using equipment with mismatched voltage specifications.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that the motors and panels imported are rated for 220/110 volts, while the local supply is 415 volts, leading to tripping issues upon startup.
  • Another participant questions why incorrect equipment was purchased and suggests the possibility of exchanging it for the proper specifications.
  • A participant mentions that the equipment can be changed but cites long shipping times, which may delay the project.
  • Clarifications are sought regarding the connection of the motors, specifically whether they are star connected and if they are being run at 50Hz or 60Hz.
  • Questions arise about whether a transformer is being used to step down the voltage from 415VAC to 220VAC.
  • One participant suggests obtaining an adapter to convert the voltage to the standard 220 or 110V, although the feasibility of this is unclear.
  • Another participant expresses surprise that the facility does not have access to 220 or 240V supply, prompting inquiries about the country of operation.
  • A later reply asserts that there is no way to run the motors without a step-down transformer, indicating a limitation in potential solutions.

Areas of Agreement / Disagreement

Participants express differing views on the potential solutions to the voltage mismatch issue, with no consensus reached on how to proceed without a transformer.

Contextual Notes

The discussion highlights the limitations of operating equipment with mismatched voltage ratings and the potential need for additional equipment to resolve the issue.

hajialeem
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The local electric supply in our country is 415 volts. Our company recently imported plant and machinery. All the motors and electric panels that have been imported are on 220/110 volts specifications. The total load of the motors is 110 Kw.

The motors are now tripping as soon as they are started. Can someone please provide a solution!
 
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hajialeem said:
The local electric supply in our country is 415 volts. Our company recently imported plant and machinery. All the motors and electric panels that have been imported are on 220/110 volts specifications. The total load of the motors is 110 Kw.

The motors are now tripping as soon as they are started. Can someone please provide a solution!

Welcome to the PF.

Why was the incorrect equipment purchased? Can it be exchanged for the proper equipment?
 
berkeman said:
Welcome to the PF.

Why was the incorrect equipment purchased? Can it be exchanged for the proper equipment?

An oversight from the supplier. It can be changed but shipping times are long, approx. 25 days and the company is not ready to delay the project that long
 
Can you clarify exactly what you've got there hajialeem: Are you saying that the rated phase voltages on your machines are 220V and you want to run them on 240. I'm assuming you currently have the 220 volt windings star connected making them a nominal rating of 220*sqrt(3) = 380 volts, whereas you're actually running them from 415 volts is that correct.

BTW. Are you using 50Hz or 60Hz?
 
How did you hook up the 220VAC motor to 415VAC system? Do you have a transformer to step down 415VAC to 220VAC? What brand of inverter are you using and what is the trip alarm?
 
Hi hajialeem! :smile:

220/110 V electrical equipment is kind of an international standard.

Can you get your hands on an adapter that transforms whatever voltage you have (that's not entirely clear from your statement) to the standard 220 or 110 V?
 
Yeah, I'd be surprised if the facility didn't have 220 or 240V. What country is it?
 
uart said:
Can you clarify exactly what you've got there hajialeem: Are you saying that the rated phase voltages on your machines are 220V and you want to run them on 240. I'm assuming you currently have the 220 volt windings star connected making them a nominal rating of 220*sqrt(3) = 380 volts, whereas you're actually running them from 415 volts is that correct.

BTW. Are you using 50Hz or 60Hz?


The rated voltages on the motors are 220volt (three phase). We want to run them on the local supply (415volts - three phase). The motors are 50Hz.
Is there a way to run the motors without the need of a step down transformer?
 
hajialeem said:
The rated voltages on the motors are 220volt (three phase). We want to run them on the local supply (415volts - three phase). The motors are 50Hz.
Is there a way to run the motors without the need of a step down transformer?

No, sorry. There is no hacking way to fix this error.
 

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