RS>  I've never tried this; but, it seems possible....
RS>  I would probably use a small series resistance between the
RS> main AC feed and the house.
RS>  I would apply these two samples to a comparitor. If the power
RS> co. voltage were higher, I'd assume that the power was
RS> incoming. If the generator voltage were higher, I'd assume that
RS> the power was outgoing.
AC>Technically you are quite wrong. BUT, it just might work OK at your
AC>home, Take care!
 I wasn't too clear; but, I was talking about the voltage drop across
the "resistor". This is a measure of current.
 Your point is still valid, though.
 He asked for ideas; and, I gave him this one to consider.
AC>To safely start a standby generator you need a change over contactor or
breaker and a time delayed no- volts relay. On voltage failure the utility
side breaker is tripped, proved tripped, then the generator run up. With
generator volts established, the generator AC breaker/or contactor is closed
 The type of generator that he was contemplating, is "started" by
being fed AC from the line; it REQUIRES this excitation to operate.
 He was going to have it "on line" at all times; and, he wanted to
know when power was incoming or outgoing.
 I don't think that this was pertaining to a power failure situation,
nor a generator test.
 TTYL.
 Robert
 * SLMR 2.1a * #4: Nine out of ten pitbulls prefer Jehovah's Witnesses.
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