Sediver 4 inch glass suspension with clevis.

Tom Miller adds the following, " This insulator has a very high M&E rating (30,000 pounds) due to the fact that it has to hold up 3/8-inch extra high strength galvanized overhead static for long spans. Some power companies will even use a 16M Alumoweld extra high strength overhead static as it will conduct better has has a lower resistance value than the galvanized.

A few power companies will insulate their overhead static line so that it can be used as a carrier for relaying on that section of line. The 235 mile long 345kV highline running between San Antonio TX and the power generation station located in Bay City Texas, uses a static wire suspension .

Not much of a voltage rating for that suspension, but they want that suspension to flashover from lightning strikes, after all that is the purpose of the overhead static line, to protect the main conductors from direct strikes!

Other examples of similar small 'suspensions' may be seen in this [id=271282118] and the next 4 pictures.