|Thread Links||Date Links|
|Thread Prev||Thread Next||Thread Index||Date Prev||Date Next||Date Index|
In previous power distribution systems my experience was similar to the suposition Rick expressed. That is that we have to satisfy two ends:
A). To insure a reasonable and reliable level of available power without overloading the power source;
B). To meet safety requirements in a fail safe manner;
will likely require a two stage approach.
For Case A some form of electronic current limiting with a sharp knee using some active device (e.g. FET or three terminal regulator). But as Roger points out silicon on a line is hazzard for failure (zap!). Therefore we employ a second limiter (e.g. big resistor, PTC, fuse) in order to meet safety regulatory requirements for fail safe in preventing overloads, fires, etc.
There's my 2¢.
P.S. Tennis? My knees can't take it no more!