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RCD types

AJJewsbury
Is it just me or are RCD types starting to get silly. After the EVSE discussion I've looked at the data sheets for a couple of manufacturers and collected the following list of RCD types:
  • AC

  • A

  • A EV

  • A KV

  • U

  • F

  • B

  • Bfq

  • B+

  • B NK

  • B SK

  • R (for x-ray/CAT supplies)



Plus 'delay' types of:
  • (none) - instantaneous

  • G short delay (10ms)

  • S proper delay/selective


I suspect type U might now be obsolete, and  Bfq and B+ from one manufacturer might be the same/similar as B NK and B SK from another, but it's starting to smack of people just making things up as they go along.


Anyone found any more?


   - Andy.
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    I don't think it's "just you"!    Thank you for introducing me to several I hadn't yet seen.  Remarkable.  I suppose there is a point to some (all?) but it's a fast-changing set, and it's hard to see it as efficient to have the number of separate products that's entailed by (all the types)*(2 or 4 pole)*(4 or more In ratings)*(1 to 3 I{\\Delta}n ratings)*?   Some that are just limited versions of others, such as F vs B, might be able to go if the price of e.g. B were to drop due to greater use of them. There's then the question of how many are defined in standards rather than just from one or a few manufacturers. Doubtless the US and surroundings have a totally different set (it's a different approach, more content to be voltage dependent). 

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  • 0
    I don't think it's "just you"!    Thank you for introducing me to several I hadn't yet seen.  Remarkable.  I suppose there is a point to some (all?) but it's a fast-changing set, and it's hard to see it as efficient to have the number of separate products that's entailed by (all the types)*(2 or 4 pole)*(4 or more In ratings)*(1 to 3 I{\\Delta}n ratings)*?   Some that are just limited versions of others, such as F vs B, might be able to go if the price of e.g. B were to drop due to greater use of them. There's then the question of how many are defined in standards rather than just from one or a few manufacturers. Doubtless the US and surroundings have a totally different set (it's a different approach, more content to be voltage dependent). 

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