Why 130VDC in utility/substations?
Why 130VDC in utility/substations?
(OP)
Why are 130VDC battery banks commonly used in the utility/substation industry?
Specifically wondering why the 130VDC? Why not 120V or 48V or whatever.
Specifically wondering why the 130VDC? Why not 120V or 48V or whatever.






RE: Why 130VDC in utility/substations?
Another issue is the batteries capacity changes over the life of the battery, so does the cell voltage change over the life, and with the tempeture.
So to speak to the battery voltage, it is a complex chemical reaction, that is managed for the capacity required.
48V batteries are used, but not in large substations due to the long cable lengths, and the higher currents required for 48V applications.
One issue the was a problem, but may have been mostly solved, is contact dirt, which tends to cause an impedance in the circuit. This dirt requires a higher voltage to breakdown the dirt to the point where it conducts. Thus another reason for a higher control voltage.
RE: Why 130VDC in utility/substations?
Like http://www.ictcorporate.com/inside/bulletins/pdf/2...
RE: Why 130VDC in utility/substations?
RE: Why 130VDC in utility/substations?
I thought it might be like that but wasn't sure.
RE: Why 130VDC in utility/substations?
RE: Why 130VDC in utility/substations?
RE: Why 130VDC in utility/substations?
Thats partly what brought up my question.. We can no longer get an "up to" 175V UL rated part and the replacement was 125V max (we said NO).. Then the whole "why 130V" just got me curious.