Stepping up/down voltage from incoming feed???

[BrianJohn]

An other option would be to utilize a buck boost transformer, MUCH cheaper, less heat gain, less exciatrion current loses and smaller foot print.

http://www.electricalpowertransformer.com/buck-boost.html


Very practical to overcome low voltage, once again you would need to arrive at an average safe voltage between no load VD and full load VD, that is acceptable to your use.

 

[Bob NH]

Doubling Voltage Cuts Power and Voltage Drop to 1/4

Increasing the transmission voltage from 240 to 480 will cut the power loss in the wire by a factor of 4. The math is as follows.

The current (amps) will be 1/2 for the same load. Power loss is Amps squared x resistance. The resistance is constant (not changing the wire) so the power loss is 1/2 squared = 1/4.

It will also cut the voltage drop as a percentage of supply voltage by a factor of 4. Since the current is 1/2 and the resistance is the same, the acutal voltage drop with a 480 supply is 1/2 of the voltage drop for the same power load on a 240 Volt supply; but 1/2 the voltage drop with twice the supply voltage (480 vs 240) is only 1/4 of the percentage voltage drop. When you convert it back to 240 you will have only 1/4 the voltage drop that you would have with the same power load on a 240 Volt transmission line.

 

[Sponsor]

 

[Poncho]

Well, in my County Sub Div in SW Indiana, every other property has a 7200 V above ground Trans, usually within 20 or 50 ft of the house. Of course, this is Under Ground Primary and the Trans steps it down to 220/240V which feeds the domicile. When I built in '85, I inquired 'bout 440/480 V feed an da questionable answer wuz a firm "hell NO"! I say questionable because if a Biz has it...why can't a resident have sammo? If I wanna pay for me own Step Down? You may ponder, what cha gonna do wit 480?...an da answer would be for me own Private Machine/Fab Shop!!!

 

[WorthFlorida]

This post is 10 years old!