Differential Relays for Power Transformer

Doesnt the manual tell you how to set the settings?

Can you tell the manufacturer of the relay so I can help you.

Hi Johnson,

Relay is AREVA MICOM P642 two winding Differential Relay

thanks for your interest

Regards...

Sefa ILI

do anybody calculate differantial setting values for that transformer ?

Yes, the properly trained transmission or distribution engineer in charge of protection setting and descrimination.

What should i set below values ?

Given the information in your original post above I would suggest you shouldn't even try!

If you don't know what you are doing (and this is actually a practical application and not a homework assignment, which it sound like it is given the data) you can easily cause massive damage to equipment and even loss of life if you set the protection wrong (both downstream and upstream of the transformer).

I would suggest you hire an electrical consultant and contact the local power authority regarding proper protection settings applicable to your application, the local power grid and local electrical standards and regulations.

Do you have someone at your (workplace, university) that can help you or atleast check your protection setting design? If so then I would tentevly say that you could get the information from the differential relay manuals and application notes off the protection relay manufacturer's website (the same goes if this is in fact a homework question), but you MUST get any protection scheme you come up with checked by someone more qualified and experienced (I cannot stress that enough given the application).

Thanks for your advice. Best regards.