Next message: (no name): "Re: lv-ab: Deadly gas"
In a message dated 10/01/2001 10:12:51 AM Atlantic Daylight Time,
writes:
> It's not really floating then, especially for small
> voltages/currents, which will go through the bulb without lighting it.
> But if you do have a (large) fault of some sort, the light lets you know
about
> it. Neat system!
Yes, small leakages are a problem. I think the thing to do is to put a meter
*and* a bulb in the circuit so that the bulb brings my attention to any large
faults, and (hopefully) I will routinely look at the meter to check for any
small leakages. Perhaps a circuit that will light a lamp even if the leakage
is small, but will also be able to withstand 120 vac too would be best.
The systems on ships have a transformer, I presume to be a very high
impedance primary, whose secondary lights up the bulb.
I do have a habit of making more work for myself. Oh well, I suppose that's
what boats are for so they "keep us out of trouble..."
Norm
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