Compliance of IEC61010-1 and VDE0884-10

Hello,

 

I am confused about the safety ratings of the part ADuM4120. Its datasheet states reinforced insulation for a working voltage of 400Vrms to meet IEC61010-1, while the rating for reinforced insulation with VDE0884-10 is 849Vpeak.

 

According to the section 14 of IEC61010-1, this norm accepts any part meeting another recognized safety standard. This means that ADuM4120 would meet reinforced insulation for 849Vpeak because it complies with VDE0884-10. So, why the rating specified for IEC61010-1 in the datasheet is lower (400Vrms)?

 

Thank you in advance.

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  • 0
    •  Analog Employees 
    on Dec 9, 2017 2:15 AM

    Hello Victor,

    This is a complex topic.  In general you are correct, that higher frequencies will degrade the insulation faster.  However there is not a simple predictive derating formula.  Many things can affect this and we can engineer insulation that has better performance at high frequency, for example in a gate driver product.

    In general we know the performance for line frequency and for fast slewing switching applications up to about 20kHz, but not to the kind of frequencies that you are asking about.  If you want to discuss this in greater detail, we should look at your application in detail off line.

    Best Regards,

    MSCantrell

Reply
  • 0
    •  Analog Employees 
    on Dec 9, 2017 2:15 AM

    Hello Victor,

    This is a complex topic.  In general you are correct, that higher frequencies will degrade the insulation faster.  However there is not a simple predictive derating formula.  Many things can affect this and we can engineer insulation that has better performance at high frequency, for example in a gate driver product.

    In general we know the performance for line frequency and for fast slewing switching applications up to about 20kHz, but not to the kind of frequencies that you are asking about.  If you want to discuss this in greater detail, we should look at your application in detail off line.

    Best Regards,

    MSCantrell

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