power transmission
power transmission
(OP)
Hi
We need to specify a cable for carrying power as well as data to approximately 10 Km distance. For data transmission over such long distances we have selected single mode fibre.
For power transmission we have to select conductors of proper gauge, transmission type like AC or DC, no of conductors to compensate voltage drops, AC/DC voltage levels etc.On the basis of these parameters we have to select proper AC-DC and DC-DC converters on both side.
The maximum total power needed at ouput(i.e. at 10Km) is less than 1 KW.Actually we need multiple voltage outputs (at different powers) at the end like +/-12V,+/-5V,+/-3.3V,+/-24V etc but net power is less than 1KW.
Theoreticaly we have done some calculations but from practical (real world) point of view can any one kindly suggest us appropriate # of conductors, conductors AWG, transmission type, Voltage level for transmission etc for our application? One constraint we have on receiving side (i.e. 10 Km) is that of size.We have a limited size box in which we have to accomodate all AC-DC or DC-DC or both converters.
We need to specify a cable for carrying power as well as data to approximately 10 Km distance. For data transmission over such long distances we have selected single mode fibre.
For power transmission we have to select conductors of proper gauge, transmission type like AC or DC, no of conductors to compensate voltage drops, AC/DC voltage levels etc.On the basis of these parameters we have to select proper AC-DC and DC-DC converters on both side.
The maximum total power needed at ouput(i.e. at 10Km) is less than 1 KW.Actually we need multiple voltage outputs (at different powers) at the end like +/-12V,+/-5V,+/-3.3V,+/-24V etc but net power is less than 1KW.
Theoreticaly we have done some calculations but from practical (real world) point of view can any one kindly suggest us appropriate # of conductors, conductors AWG, transmission type, Voltage level for transmission etc for our application? One constraint we have on receiving side (i.e. 10 Km) is that of size.We have a limited size box in which we have to accomodate all AC-DC or DC-DC or both converters.






RE: power transmission
Another option is to use undersized (for voltage drop, not ampacity)cable and put good regulation on the receiving end. At only 1000 Watts, paying for the losses in a smaller cable may be cheaper than a larger cable.
Bill
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"Why not the best?"
Jimmy Carter
RE: power transmission
If you have more space choosing 750..1500 V DC and buying a DC/DC designed as auxilliary power-suppy for light railway application might be a good choice. In this case you will need less cross section for the cable.
If you go for line frequency AC you will need a quite bulky transformer.
RE: power transmission
Keith Cress
kcress - http://www.flaminsystems.com
RE: power transmission