I appreciate all of the input.
While for obvious reasons I cannot determine the flexibility of the thing, I do know that we have the Stockholm type on the lines coming from the powerhouse, and these other ones installed on the bus phases are different.
They are wrapped over and snug against the conductor, not suspended below it, as on the lines. They do not completely encompass the bus, they just seem terminate laterally even with the bus on either side.
They are bolted on top of the phase bus sections, and there seems to be one for every bus section, like between the support struts which hold the bus off the ground.
They are not installed on the buswork between circuit breakers and disconnect switches however, only on the east and west buses. I would paste a simple one-line of the switchyard here for your visual understanding of our system if that would help, but it will be quite a large file, in terms of megabytes.
Suffice it to say we have a "breaker and a half" scheme, with buswork on either end connecting the grid together - THERE is where these things are installed, and no where else.