root@Omega-975A:~# uptime
14:47:02 up 5 days, 3:35, load average: 0.11, 0.04, 0.01

I think problem was solved. I have connected omega directly to stabilizer. After it omega hasn't shut down so far.
@ccs-hello Thanks a lot for suggestion.

@Douglas-Kryder USB works with direct connect to omega without any elements. I have checked it with web camera.