I mean we have not completed one cycle of seasons yet..>> not a full year completed. completed about 4/5 months with new insulators with peak loads & results are satisfactory
I have a suggestion to use silicone rubeer insulators which on our first recent experience seems to be working well.
May be you might have difficulties in expenses. But as we changed the ceramic insulators to silicone rubeer type the tripping on coastal lines (MV) (and on hills where humidity is...
To earth the LA via a separate conductor is not only realistic but also adivisable. the LA should be effectively earthed to ensure its function Actually our practice in small substations is to provide a separate earthpit.. but on line earth cable with proper earth & min resi. is OK