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Re: Europa-List: OV protection

Subject: Re: Europa-List: OV protection
From: Jos Okhuijsen <josok@ukolo.fi>
Date: Fri, 18 Jul 2003 00:11:09

Following this never-ending discussion, which is generally a repetition 
of a similar thread on the electric list i still wonder why this highly 
technical subject is treated without any relevant data. What would be 
interesting to know is: What is the Mean Time Between Failure of 
alternators, regulators and do not forget, what is the MTBF of overload 
protectors? There is just too much assumption here. Assuming there is 
overload protection on electronic devices like radios, assuming they are 
not, or not reliable enough. Assuming that an OV will not induce new 
risks, like spontanious triggering, triggering on switching loads on the 
circuit, plain failure.
Adding components and circuitry adds to the failure rate of the total 
assambly. That's a fact and not an assumption.
Without proper data and  risk analyses of the different scenarios with  
and without an OV it is fairly impossible to draw conclusions.
Without conclusions it is pretty silly to change from general practice.
Please let somebody find the MTBF's

Jos Okhuijsen




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