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rwolf99@aol.com wrote:
Having said that, no electronic unit will work without power. Now you look at internal backup batteries, redundant power sources, multiple generators/alternators, duplicate paths for power, no single point failures, and perhaps other things which are totally separate from the unit itself. In this sense, the non-TSOd unit and the TSOd unit are equally reliable.
What you are saying is that in a system with multiple alternator/batteries and isolated/redundant busses, a TSO's system and a non-TSO's system can equally survive an adverse event like a lightning induced power surge or an alternator caused voltage surge. I would strongly disagree with your conclusion.
Hardening a system against these events requires money. It requires money in engineering resources to design it and money to test the design, all of which needs to be amortized over every unit sold. Then there is the cost of additional components added solely for hardening the system. Having been down that path a few times, having seen the bill for lab testing and the costed bill of materials, I can tell you that we are NOT talking pocket change.
Will a company that does not need to meet a TSO spend that money and increase the price of their system? How many actually do that? How many just claim that their system is "capable of meeting the TSO" but they have never actually bothered to test it?
Regards,
Hamid
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