I am U.S. based so I don't know if these will be of any help to you are not. The magazines I would recommend are:
EC&M (Electrical Construction and Maintenance)
I would recommend the IEEE Color Book series, especially the Red Book which is the "Recommended Practice for Electric Power Distribution for Industrial Plants"
I would also recommend the NEC Handbook because it provides many illustrations on how to install equipment correctly.
If you are involved in electric motor issues, another good paper magazine (not available on-line yet) is Electrical Apparatus, the magazine for the motor rewinding industry. Although oriented towards the North American market, it is a great resource for many motor and transformer issues even if you are a user instead of a service shop.
This is an excellent magazine for buildings and commercial systems, although it covers a broad range of engineering and construction topics. It has frequent articles on electrical topics.