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3 phase control circuit

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Hi, I found below circuit for controlling three phase system and detecting faults like over/under voltage and phase unbalance. But I can't understand some parts. Can anyone help me to analyze this circuit please? Its inputs are 3 phases L1, L2, L3 and control is done by micro controller that in the case of an error activate relay and LEDs.

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The schematic appears to be incomplete. And is terribly drawn.
 

Once, I made a higschool project on controlling 3 phase induction motors and I used mc3phac ic from freescale. It is very easy to control motors with that ic if you have a proper ipm. The reference design is in datasheet. But I don't know if that chip is still in production
 

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