running 480v machine on 380v
- Thread starter Emad
- Start date
MTW
Senior Member
- Location
- SE Michigan
Here is a company in Spain that lists the voltage range your looking for. 380 to 480 in an 3Φ auto transformer.
download the catalog and have a look at page 53.
download the catalog and have a look at page 53.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Is frequency a concern?
MTW
Senior Member
- Location
- SE Michigan
He would need to check with Miller on his specific model and frequency, but on the looks of it, I doubt it.
Last edited:
Birken Vogt
Senior Member
- Location
- Grass Valley, Ca
Is there a possibility of returning this one and simply buying the 400 volt version?
MTW
Senior Member
- Location
- SE Michigan
Probably could be run at 380-400 native voltage with a higher amperage, but would need to get miller's blessing with his model and frequency specifics.
The cut sheet specifications shown above show 400-460V @50/60Hz, only the input amps required varies for the voltage supplied.
The model tag shows 460-575V at both 50/60Hz I doubt that there would be a different model for 380V, likely it would just need a bit more current, the spec sheet shows 60A current @400V, you would be wise to ask Miller directly if the machine can be operated at 380V 50 Hz directly, and avoid the use of a transformer.
I have one of their older model Inverter welding power units and it will operate off of three different voltages as well as single and three phase, without changing any wiring input configurations. My guess is that this inverter heating power supply is designed very similarly. You could look in your manual, it may spell it out in there, as the nameplate tag has limited room for information.
In an inverter machine, most of the AC current is rectified into DC and then inverted into high frequency, and your nameplate implies that, but again it would be wise to check the manual or ask Miller directly, instead of making assumptions or taking my suggestions.
To be on the safe side, I recommend asking them directly or looking in the manual shipped with the unit. But I would doubt that you need the transformer as long as you provide it enough current for full output, if required.
In the American market 380-415V 50Hz is considered the universal European voltage and most things will operate fine if supplied within that range. Have you actually measured your voltage at the site where the heater will be operated, instead of just taking someones word for the standard voltage in the area?
The cut sheet specifications shown above show 400-460V @50/60Hz, only the input amps required varies for the voltage supplied.
The model tag shows 460-575V at both 50/60Hz I doubt that there would be a different model for 380V, likely it would just need a bit more current, the spec sheet shows 60A current @400V, you would be wise to ask Miller directly if the machine can be operated at 380V 50 Hz directly, and avoid the use of a transformer.
I have one of their older model Inverter welding power units and it will operate off of three different voltages as well as single and three phase, without changing any wiring input configurations. My guess is that this inverter heating power supply is designed very similarly. You could look in your manual, it may spell it out in there, as the nameplate tag has limited room for information.
In an inverter machine, most of the AC current is rectified into DC and then inverted into high frequency, and your nameplate implies that, but again it would be wise to check the manual or ask Miller directly, instead of making assumptions or taking my suggestions.
To be on the safe side, I recommend asking them directly or looking in the manual shipped with the unit. But I would doubt that you need the transformer as long as you provide it enough current for full output, if required.
In the American market 380-415V 50Hz is considered the universal European voltage and most things will operate fine if supplied within that range. Have you actually measured your voltage at the site where the heater will be operated, instead of just taking someones word for the standard voltage in the area?
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
A 480 Delta to 380Y is readily available, what about using it in reverse? Just make sure the XO floats with no supply neutral connected.
Electrical - Transformers - Page 1 - TEMCo Industrial
temcoindustrial.com
OP is in Libya. Probably not as readily available.A 480 Delta to 380Y is readily available, what about using it in reverse? Just make sure the XO floats with no supply neutral connected.
Electrical - Transformers - Page 1 - TEMCo Industrial
Been there - it is 50 Hz.
Doesn't matter. The heater will work on either.
What heat treatment device is used ?
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
The one in posts #4 and #5.
Thank you sir.