Self-Shut Relay

Discussion in 'General Electronics Chat' started by alphi, Oct 21, 2009.

  1. alphi

    Thread Starter New Member

    Jan 28, 2008
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    Dear all,

    What is self shut relay?
    where it can be used?
    How does it differes from the other type?

    Can anyone plz explain?

    Thanks in advance
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    282
    If a relay has normally closed contacts (NC), then those contacts will be closed and conducting with power to the coil removed.

    Some relays only have normally open (NO) contacts, and only conduct when energized. Some have both NC & NO contacts. Some only have the NC contacts.
     
  3. alphi

    Thread Starter New Member

    Jan 28, 2008
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    So it means; self-shut relay is a NO relay.
    is it correct?

    regards,
    :)
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
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    282
    It's not really a standard term. I see it as a relay that has a NC contact. - remove power and it makes the contact.
     
  5. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    If a little more context for that term were given, it would be easier to explain or to guess at what is meant. For example, is it from a motor-control circuit? Is it an English translation from another language?

    John
     
  6. alphi

    Thread Starter New Member

    Jan 28, 2008
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    I got it from some automotive circuit used as ignition relay
     
  7. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    Was it a button start relay, where a momentary push on a button causes the relay to stay pulled in?

    John
     
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