Posted by JMOR on January 11, 2015 at 10:12:25 from (72.181.168.203):
In Reply to: Voltage regulator posted by MNGB on January 11, 2015 at 09:53:27:
The difference that it makes is that any loads connected to load terminal will receive generator current directly from the generator without the regulators current sensing circuits knowing anything about it. In other words the current regulator function will ONLY apply to the generator current going into the battery, totally independent of any loads being supplied via the L (load) terminal. Imagine a lighting load so large that the lighting current plus the battery charging current is so large when combined that it exceeds the regulators current limit. If those loads are connected to the battery, this combined load is the way the regulator senses and controls generator maximum current & would cut back on field current & thus generator output to stay within the design current limit. However, when those lighting loads are connected to the load terminal, the regulators current sensing function does NOT see that current, rather it sees only the current applied toward re-charging the battery and allows the generator to do its best to support both loads.
The scheme appears to do nothing to protect the generator from current overload, which may be why it fell from grace over the years.
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