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Power & Energy
Forum Overdriving relays
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  • State Not Answered
  • Replies 3 replies
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  • dc-dc
  • power_management
  • power_distribution
  • Design
  • power_supply
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Related

Overdriving relays

Catwell
Catwell over 15 years ago
Let's say I had a 3A rated relay, and I drive it with 10A. What should I expect immediately? And over time?

Cabe
 
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  • enrico.migchels
    0 enrico.migchels over 15 years ago

    Hi Cabe,

     

    Streching the limits are you? Additional interesting questions would be: AC or DC current, what kind of load and how high is the voltage on the contact if the relay is deactivated? Why is this interesting to know? inductive loads stress the contacts when opening, capacitive loads stress the contacts when closing. As all contacts bounce there is a lot of dissipation during the bounching. If the voltage is higher the contacts burn-up faster. DC is more worse than AC (arcing is difficult to stop with DC).

     

    So, no answer.... more questions.... :-)

     

    Best regards,

     

    Enrico Migchels

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  • enrico.migchels
    0 enrico.migchels over 15 years ago

    Hi Cabe,

     

    Streching the limits are you? Additional interesting questions would be: AC or DC current, what kind of load and how high is the voltage on the contact if the relay is deactivated? Why is this interesting to know? inductive loads stress the contacts when opening, capacitive loads stress the contacts when closing. As all contacts bounce there is a lot of dissipation during the bounching. If the voltage is higher the contacts burn-up faster. DC is more worse than AC (arcing is difficult to stop with DC).

     

    So, no answer.... more questions.... :-)

     

    Best regards,

     

    Enrico Migchels

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