Heat treatment machine power supply issue

[Emad Shaaban]

Hi every one
A heat treatment machine (pro heat 35) works with power supply 470v/575v..please see attachment
What options I have to make this machine works on 380v power supply

 

[davidbeach]

A transformer.

 

[waross]

What David said.

 

[Mark_Markus]

Best for temporary or low-budget solutions: sse a Step-Up transformer. ​

 

[Emad Shaaban]

What if user the standby 380v generator and then increase its excitation,will that affect winding withstanding?

 

[waross]

What if user the standby 380v generator and then increase its excitation,will that affect winding withstanding?

You have to check the generator nameplate to see if 480 Volts is an available voltage.
It may need a change in the connections and it will need an adjustment of the AVR.
Another issue with the generator is the maximum Volts-per-Hertz of the windings.
If you try for a voltage much above the rated V/H, saturation will limit further increases of voltage.
And, the voltage based on the V/H At 60 Hz is 6/5 times the maximum voltage at 50 Hz.
You may have to adjust the governor up to 60 Hz.
While reconfiguring the generator is most likely possible it is not a simple adjustment.
Your best option is a pair of 380:110 (or the closest available ratings) transformers configured as an open delta auto-transformer.

 

[Emad Shaaban]

Thank you every one, I tried to find 380/480v step up transformer ,but it seem to be unavailable on the local markets on my region.
Can you please suggest other options please

 

[waross]

Read my bLIPs;

Your best option is a pair of 380:110 (or the closest available ratings) transformers configured as an open delta auto-transformer.

Pit falls:
Volts per Hertz.
380 Volts suggests 50 Hz.
60 Hz transformers used on 50 Hz must have the maximum allowable voltage reduced in the ratio of 50Hz/60Hz to avoid magnetic saturation.
With a maximum voltage of 575 Volts you may consider limiting 50 Hz voltage to 489 Volts.

Try a 480 Volt to 120 Volt single phase transformer configured as an auto-transformer.
480V + 120V = 600V
600v x (380V/480V) = 475 Volts. (600V x (50Hz/60Hz) = 500 Volts = Safe from saturation.

Capacity:
Assume 40 Amps.
120 Volts x 40 Amps / 1000 = 4.8 KVA minimum.
Substitute your current and do the math to determine the needed capacity.
Two such transformers are needed.
Open delta, auto-transformer boost connection.
I have used this solution many times going from 480 Volts to 600 Volts and a similar solution going from 600 Volts to 480 Volts.