HICO introduced their first, compact MV GIS (25.8kV, 25kA) in 1993. Did you know that their first ECO Friendly MV GIS (with SF6 Free Technology), to support their goals for a greener environment, was introduced in 2013? HICO’s line of SF6 free switchgear utilizes an insulation composition of “DRY AIR (N2 – 79% & O2 – 21%)”.
Substation space restraints are common in the mid-Atlantic and the Northeast. This is perhaps one of the biggest drivers to MV GIS. Other considerations are reduced maintenance costs and environmental concerns.