Easergy P3L30 line differential issue

[Milica_Repac]

According to user manual documentation for Easergy P3L30 estimated transmission length for line differential protection is 15km. We need to protect transmission line, which is 40km long. Is it possible to extend this length? Is there any additional device, which can be used with Easergy P3L30 to extend this length? 

We have considered MiCOM line differrential relays, but they don't meet other requirements. 

I'll be grateful for any suggestions.

[HenriGRASSET · Accepted solution]

Hello,

From the P3L user manual available in our website, you can find that the maximum length is 120 km with the list of accessories in clause 13.2. Accessories - Table 172 - Easergy P3L30 accessories