inverter overload (was transformer inrush) [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

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I'm pulling out one piece from Kurt's reply to make a corrective suggestion.

Kurt wrote:

>... Wire the primary side of the "T-240"
>transformer through that switch so the windings aren't a phantom load
>all day.  Best to parallel the two sets of contacts in the pressure
>switch as you'll be switching higher current at the 120 volt side of
>that transformer.  ...


It won't help much to parallel the two sides of the p. switch because 
the 2 sets of contacts don't make or break exactly simultaneously. 
One set of contacts will take the full current during the make or 
break. The only way to prevent contacts from welding or burning is to 
use a "heavy duty" p. switch (or a relay) rated for 2X the current of 
the pump.

Windy

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