Phase indicator


Posted on May 19, 2012

The circuit provides a simple means of determining the succession of phases of a 3-phase 120 V source used in synchro work. Terminals A, BT and C are connected to the three terminals of the source to be checked. If the neon bulb lights, interchange any two leads; the light then extinguishes and A, B, and C indicate the correct sequence. If power on any one line is lost, the neon bulb will light.


Phase indicator
Click here to download the full size of the above Circuit.

This feature may be useful for monitoring purposes.




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