Phase sequence IC

[leonel]

Does anyone knows any IC that monitors my phase sequence?

 

[Nigel Goodwin]

How about giving some details?, your question is pretty meaningless?.

Do you mean for identifying three phase mains?, how are we supposed to know what you mean?.

 

[leonel]

Sorry...
I want to know the phase sequence, for example if two phase are reversed, L1-L3-L2, light a led, and everything is ok L1-L2-L3 my led stay off

 

[hjames]

Use a flip-flop. Connect the clock to L2, and the input to L1. If the output is high, then it's L1-L2-L3, if low it's L1-L3-L2. (Obviously condition the signals so that they are compatible with the logic level flip-flop). If you add more flipflops in the same way, you can probably detect missing phases.

 

[Hero999]

Is this mains?

You need to run this from step down transormers. Three cheep and nasty 1.2VA tranformers will work.