DPDT relay at up to 1500VDC?

Discussion in 'General Electronics Chat' started by theeloquentmime, Nov 9, 2008.

  1. theeloquentmime

    Thread Starter New Member

    Nov 9, 2008
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    Hi all,

    I'm looking for a relay that will handle voltage up to 1500VDC at a very low current, and switching/controlling voltage has to be 5V. I've searched in most major catalogs and can't seem to find any relay that meets the spec. Does such product even exist? :confused: Thank all for your help in advance, much appreciated!
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. SgtWookie

    Expert

    Jul 17, 2007
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    [eta] After re-reading the requirements (DPDT) I realized that the switch I posted a link to doesn't meet the requirements - nor do they have any suitable relays.
    Found on this page:
    http://www.gigavac.com/products/relays/gigavac/index.htm

    Kind of a pain to find, because they don't have the coil voltage rating on the search page.
     
    Last edited: Nov 9, 2008
  4. scubasteve_911

    Senior Member

    Dec 27, 2007
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  5. John Luciani

    Active Member

    Apr 3, 2007
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    I am not sure about the 5V but Kilovac can do the high voltage ---
    http://relays.tycoelectronics.com/kilovac


    (* jcl *)
     
  6. theeloquentmime

    Thread Starter New Member

    Nov 9, 2008
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    Thank you all for your help. After reading through the pages, I have a question.

    What does the relay parameter "Contact Rating @ Voltage" mean? It seems that the relays are able to handle high voltage at low current, and high current at low voltage. In the particular application I'm interested in, it has very low current. (less than 0.5mA) Does that mean I can use a relay that is perhaps rated for 3A @ 30VDC? If not, what will happen if I use it?

    Also, how is the voltage rating on relays determined? By the amount of insulation to prevent arcing?

    Thanks again for your help.
     
  7. scubasteve_911

    Senior Member

    Dec 27, 2007
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    I believe you're right, it must be the amount of insulation that dictates the voltage rating. Remember, relay contacts can be fairly close and high voltage may arc to make contact. There is a separate switching power rating, which is in VA or watts. Clearly, you're under this rating for almost any relay.

    Steve
     
  8. theeloquentmime

    Thread Starter New Member

    Nov 9, 2008
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  9. PRS

    Well-Known Member

    Aug 24, 2008
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    The spec on one of those relays is 5 volts and the rating of the voltage between the switched contacts appears to be 10kva. So I think it will work.
     
  10. scubasteve_911

    Senior Member

    Dec 27, 2007
    1,202
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    Is your name Steve? :p

    What PRS said :D

    Steve
     
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