Restraint current Micom p545

[Layla]

I have a question regarding the Micom P545 line differential protection. I understand that the bias current is calculated as the scalar sum of the currents at both ends, divided by 2. However, when viewing the bias current in the protection settings, specifically in the Measurement 3 section, it shows double the value I expect. I am uncertain whether the protection has a specific configuration that alters the calculation method, or if I have misinterpreted the formula. I have attached example values collected from the protection for reference.

[Gregory_Meunier · Accepted solution]

Hi Layla,

To answer your question, we need the setting files of the two relays.
We recommend that you do not share them here.

Please contact your local technical support so we can provide a dedicated answer to your issue.

https://www.se.com/ww/en/work/support/country-selector/contact-us.jsp