Larry, I wrote you back in Sept 17th about my confusion with 130vdc. Thank you for the response. I am still having problems understanding the concept of 65 volts on one side of the system and 65v on the other. The battery bank has no center tap, only pos and neg and betwn the two we get 130vdc. That is obvious. Yet in the field I get a seperation of voltage. Another stab at help from you would be appreciated. Thanks, Lee
reply to Larry Fine
- Thread starter henrylee
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LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
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- Electrical Contractor
Lee, first, what is the application? What is the equipment that requires the DC voltage? What is the current draw? How important is the exact center-voltage?
The only way to obtain half voltage from a 2-wire DC source is dividing resistors, unless you use an electronic DC-to-DC inverter. If the load on each half of the equipment is not the same, the center voltage point will drift away from 65/65 with resistors.
Are you sure you can't obtain a center tap from the battery bank? If the quantity of batteries in series is an even number, you could add a wire at the jumper between the two halves of the bank.
The only way to obtain half voltage from a 2-wire DC source is dividing resistors, unless you use an electronic DC-to-DC inverter. If the load on each half of the equipment is not the same, the center voltage point will drift away from 65/65 with resistors.
Are you sure you can't obtain a center tap from the battery bank? If the quantity of batteries in series is an even number, you could add a wire at the jumper between the two halves of the bank.
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