rojay
Senior Member
- Location
- Chicago,IL USA
Does anyone have any experience with the use of DC generators? Our company is bidding a cell site job where a DC generator is proposed to provide back up for all -48 volt DC equipment loads.
There is no transfer switch. The DC generator is to backfeed a breaker mounted to a DC power plant busbar inside an outdoor equipment cabinet. The DC power plant is derived from AC supplied rectifiers with back up batteries inside the cabinet.
I see this this as an Article 702 system. This is not a portable generator. Isn’t some sort of transfer equipment required by 702.5?
If utility power was supplied to the rectifiers and the DC generator was supplying power at the same time, would this result in a backfeed or would the rectifier diodes block a backfeed?
Any thoughts?
There is no transfer switch. The DC generator is to backfeed a breaker mounted to a DC power plant busbar inside an outdoor equipment cabinet. The DC power plant is derived from AC supplied rectifiers with back up batteries inside the cabinet.
I see this this as an Article 702 system. This is not a portable generator. Isn’t some sort of transfer equipment required by 702.5?
If utility power was supplied to the rectifiers and the DC generator was supplying power at the same time, would this result in a backfeed or would the rectifier diodes block a backfeed?
Any thoughts?