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What is Rated insulation voltage for relay?

  1. Mar 5, 2009 #1
    what is Rated insulation voltage for relay?

    On the catalogue of a relay, it says

    "Rated insulation voltage (Ui) V 250 (IEC), 300 (UL, CSA)"

    it doesnt say its AC or DC.

    it also says

    "Dielectric strength

    (rms voltage)

    Between coil and contact a V 2500
    Between poles a V 2500

    Between contacts a V 1500"

    Lets say my application involves putting 230V DC across the pole of the relay, will it work?

    For Rated insulation voltage, it doesnt says AC or DC.
     
  2. jcsd
  3. Mar 5, 2009 #2
    Probably won't work if you are opening a circuit under load.

    Contact manufacture to verify if relay will or will not work.

    Relay contacts that open in air usually won't open more than 60 or 80 volts DC when there is current through them.
    Some relays that use magnets to deflect the arc can operate at higher voltages.

    If are only using relay to discharge capacitor through resistor and not breaking current, relay may work.
     
  4. Mar 5, 2009 #3
    Isolation voltage. As long as your load in not inductive and the current it passes is within rating and all that, it will work.
     
  5. Mar 7, 2009 #4
    "Lets say my application involves putting 230V DC across the pole of the relay, will it work?"

    Depends by what you mean by putting 230V DC across the pole of the relay.
    If you mean that the pole is 350V DC above ground and you are only opening say 6 volt at say 100 mA, then it will should work.

    If you mean that you are opening 230V DC at say 100 mA, then it probably won't work.

    Let us know how you are actually operating the relay.

    Good Luck
     
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