[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Original poster: David Sharpe <sccr4us-at-erols-dot-com>
With large ballasted systems, with current swings, what
kind of "insertion impedance" does the ballast present
between the utility source and the load. I suspect it
will generally fall into two categories:
1. Ballast "clips" the upper peaks of current and load
sees this as a "clipped" utility voltage. This would
be a similar operation to a "Tungsol" current
regulator; and might be representative of a "L + R"
2. Ballast presents a uniform impedance between source
and load. A short circuited welder or inductive ballast
system would be representative.
I would assume what would be deisred is a constant current
characteristic that might on surface suggest that 1 is more
favorable. On negative side, I could invision an increased
risk of transformer saturation with 1 versus 2.
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA. USA