Which Voltage Should I Choose?
Which Voltage Should I Choose?
(OP)
I have a 3-phase, 440VAC, 50 Hz line supply (from a portable generator), with a load that can operate either on 380, 400, or 415, 50 Hz. I am hoping to find a "off the shelf" transformer here in the US that will step down the voltage to one of these levels. Is one of the above a better choice over the others?






RE: Which Voltage Should I Choose?
Wm
RE: Which Voltage Should I Choose?
Jim
RE: Which Voltage Should I Choose?
Wm
RE: Which Voltage Should I Choose?
The main piece of equipment will be powered by 440V. This piece of equipment will only operate at one of the stated voltages and requires roughly a 90amp service. When looking at the 60hz specifications, do I only need to worry about input voltage de-rating since I am operating at 50 hz?
RE: Which Voltage Should I Choose?
Jim
RE: Which Voltage Should I Choose?
RE: Which Voltage Should I Choose?
second way i think you can use voltage divider with series resistance.
fafa
RE: Which Voltage Should I Choose?
You are probably dealing with a piece of European equipment, but you will have to tell us what it is before we can recommend anything else about whether it is OK on the lower voltage or higher frequency. Generally, for iron-core equipment, 380V/50Hz looks the same as 480V/60Hz. Electronic equipment such as VFD's may not care what the input is, or you may just have to move a switch or something to tell it what the incoming power is. Check with the manufacturer.
Farhadkhaefi:
A voltage divider using resistance only wastes the energy in the top resistor. The same idea, only using inductance instead of resistance is accomplished with a buck/boost transformer, or an autotransformer.
Will-I-Am