Redundant Power Monitoring and Switching

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Discussion Overview

The discussion revolves around the monitoring and automatic switching of two 110V AC power sources, particularly focusing on solutions for seamless transition when the primary source fails. The scope includes technical considerations and practical applications related to power management systems.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about solutions for monitoring and switching between two 110V AC power sources without delay.
  • Another participant suggests using a UPS (Uninterruptible Power Supply) for loads like computers, noting that larger UPS units provide longer backup times before discharging.
  • A different participant emphasizes the complexity of the problem, highlighting the importance of understanding load requirements, sensitivity to power fluctuations, and the definition of "without delay."
  • A suggestion is made to search for "zero break static transfer switch" as a potential solution.

Areas of Agreement / Disagreement

Participants express varying opinions on the best approach to the problem, indicating that multiple competing views remain without a consensus on a single solution.

Contextual Notes

Participants have not fully defined the load specifications or the exact requirements for switching speed, leaving some assumptions unresolved.

spurscouk
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Hi,

Was wondering if anyone can help on what can be used to monitor two 110V AC power source and switching automatically when the primary source fails without delay?

Thanks in advance.
 
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How big of 110V load are you trying to carry? If it is a computer, you can usually just plug into a UPS. The bigger the UPS, the longer it will run before it runs out of battery charge. The UPS provides direct power off of the battery so that the protected device does not see any power outage until the UPS is discharged, hence bigger equals lasting longer.
 
This is not a trivial problem - that is why most critical loads are on UPS - it is far easier to have 2 AC supply to the battery and then one output.

What is the load
V and I requirements
How sensitive to transients, drop outs - etc.
What is without delay? ( within one half cycle) or sub- cycle
 
Search on "zero break static transfer switch"
 

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