Electrical final elements
Can anyone share their experience? Very practical two questions related to an issue which exists in many PFDavg calculations.
What's your approach to a safety loop that includes typical electrical final elements, e.g. contactors? Although the IEC61508 and IEC61511 standards apply to electrical devices, many such solutions widely used in industry lack certification and reliability data. And if the data is available, it's usually related to PFH and is based on B10d - not well suitable for demand mode of operation calculations.
Second one: how do you confirm their systematic capability?
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Electrical final elements
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