At 08:52 AM 11/17/2009, you wrote:
>
>I investigated this earlier and this is what I found:
>
>1. No harm is done with both alternators online. The theory that
>there is a problem stems from twin engine systems with elaborate
>schemes to deal with 2 alternators.
Correct . . . and the "problem" was that light twins fitted
with alternators were plagued with inability to make two
alternators PARALLEL . . . i.e. share total loads. I've
developed several approaches to alternator paralleling. Quite
frankly, if you have TWO alternators capable of carrying
most if not all of total system loads, then Z-14 and
NO paralleling is the better way to go.
But the system is not placed at risk by having two
alternators on at the same time. Unless they are
calibrated to within millivolts of each other, the
device with the higher set-point "hogs" the load
until it reaches its output limit. The bus voltage
then sags until the alternator with the lower setpoint
picks up the difference.
Bob . . .
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