SF6: The Perfect Gas for the Minneapolis Utilities Industry


Toll Company seen as a key producer of dielectric gases – also known as insulating gases – for the Minneapolis electrical utilities industry. These gases are used primarily to either avert or swiftly put an end to electrical discharges, for which their dielectric characteristics render them ideal. The most prominent of these gases and the one most sought from us is sulfur hexafluoride (SF6).

Utilities apply SF6 to electrically insulate high-voltage transformers, sulfur hexafluoride circuit breakers, switchgear, and other such devices.

Where SF6 circuit breakers are concerned, they’re pretty much replacing oil-filled circuit breakers (OCBs), which, because of the fear of their being contaminated with now-banned, environmentally toxic polychlorinated biphenyls (PCBs), are no longer preferred.

The extensive use of SF6 under pressure in gas-insulated switchgear is because of its exhibiting a dielectric strength markedly higher than air or dry nitrogen (the latter another gas used widely by our utilities industry customers).

One major reward of SF6’s high electronegativity and density is that it enables the utilities industry to cut the size of electrical gear. This makes it possible to place such gear in more-manageable indoor environments, rather than air-insulating it outdoors. Gas-insulated equipment placed indoors is, of course, less subject to the damages wrought by climate and pollution. Besides that, a controlled environment also promote greater system trustworthiness and longevity.

If for any reason you’re still not acquainted with SF6 and would like to learn more about its advantages in utilities industry application, contact Toll Company, your Minneapolis PurityPlus® Partner, today.