Difference between smart diode and normal diode

Discussion in 'General Electronics Chat' started by rizwan.bashir, Aug 15, 2013.

  1. rizwan.bashir

    Thread Starter New Member

    Aug 14, 2013
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    Has anyone heard about the term "smart diode" used in earth continuity relays?

    What is the difference between a smart diode and a normal diode?
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    Could you throw us a bone and provide a link of some kind to some place where these are mentioned?
     
  3. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    Could be referring to pilot core protection, such as used in mining operations to respond to faults or damage in trailing power cables.
     
  4. rizwan.bashir

    Thread Starter New Member

    Aug 14, 2013
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    Yes, they are used in mining sector to check earth continuity. The usual idea is to check earth continuity (look for a diode or smart diode). You send a positive pulse and look for a low voltage because the diode is forward biased and then you send the negative pulse and see open circuit (as the diode is reverse biased). Then you transmit power.
    I know this much but can anyone give me any design/circuit for this smart diode stuff used to check earth continuity for equipments used in mining sector.
     
  5. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    A "Smart Diode" is one that can log on to the internet. ;)

    Oh hang on, that's an "iDiode".
    :D
     
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  6. Papabravo

    Expert

    Feb 24, 2006
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    If a diode is a poem about death, then a smart diode must be a smart poem about death -- right?
     
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  7. rizwan.bashir

    Thread Starter New Member

    Aug 14, 2013
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  8. t_n_k

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    Mar 6, 2009
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    You can either get angry or get smart.

    You were already asked by WBahn to provide some link to where such a smart diode was specifically mentioned.

    You didn't respond. It would help if you were able to provide that information or link. Then you won't have to feel you have been teased.
     
  9. rizwan.bashir

    Thread Starter New Member

    Aug 14, 2013
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  10. t_n_k

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    The relay data makes no mention of a smart diode. In fact on page 7 the data sheet suggests using a 1N4007 1000V 1A diode. That's an ordinary commonly used silicon diode.
     
  11. LDC3

    Active Member

    Apr 27, 2013
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    It appears that TI produces a "smart diode" for PV panels.
    http://www.ti.com/lit/ds/snvs903/snvs903.pdf
     
  12. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    No doubt of interest but probably not relevant to the OP's question as they have already indicated the issue is with mining cable pilot wire protection schemes.
     
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