At 4:15 PM +0930 4/19/05, themacuser wrote:
2-phase power as in two phases, neutral and earth?
As in two hot and one neutral, 110VAC RMS from each hot to neutral, 220VAC RMS from hot to hot.
Bzzzzzztt. Wrong answer! What you have is plain old 220 single phase just like virtually everyone else has. Actual two-phase power hasn't been used in this country for decades, and when it was, it was for industrial use only. It was NEVER installed in homes. Where it was used was predominantly in a few New England states. I belong to an old woodworking machine Yahoo group with a couple thousand members. These guys live to collect and restore old machinery. The older and bigger, the better! To most of them, a 12" jointer or 36" bandsaw is small stuff. Out of all those folks I'm only aware of two people who actually own any two-phase powered machinery. They have had to do some fancy electrical tricks to be able to run these old machines. Makes the three-phase converters that most of us have seem like child's play! If you really want to know more about two-phase, go to the OWWM Yahoo group list achives and do a search on two-phase power. This was a topic of discussion on the email list just a few months ago. We have guys on the list who live for this kind of stuff.
JR (who has a degree in industrial maintenance, and has worked with single and three-phase for more years than I want to think about)
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