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
I don’t think I could ever find anything as clear and straightforward as this. Thank you so much, @waross — you’ve explained it in a way that perfectly aligns with my limited background on the topic.
Many thanks to everyone for the valuable information and advice shared
A quick note on voltage reduction by auto-transformer.
There are two possible connections.
1. The buck connection where the secondary connections are reversed so as to subtract the secondary voltage rather than adding it.
2. The conventional auto-transformer connection where the higher voltage is connected to the end of the secondary winding and the lower voltage is pulled from the junctions of the primary windings and the secondary windings. In this case, the secondary winding carries both the load current and the primary current.
Despite that it is often preferred to the buck connection. The greatest use in North America is converting from 480 Volts t0 600 Volts and from 600 Volts to 480 Volts.
The most used transformers are 120v:480V. The buck connection would require a less common 600V:120V transformer.
Also, in the plant with the mix of 480 Volts and 600 Volts, we always had on hand 480:120 Volt transformers which could be used either way.
