What is the difference between RMU switchgear and SF6 switchgear?
RMU and SF6 switchgear serve different power distribution needs. RMUs are compact, medium-voltage (7.2-24kV) units ideal for urban networks, offering air/solid/SF6 insulation and ≤25kA breaking capacity. SF6 switchgear uses sulfur hexafluoride gas for superior insulation and arc quenching, handling up to 800kV/63kA in GIS systems. While RMUs are cost-effective for space-constrained applications, SF6 units excel in high-capacity scenarios but require strict gas management due to SF6's high GWP (23,500). The industry is shifting toward SF6-free RMUs and digital solutions. Choice depends on voltage needs, fault levels, space, and environmental factors.
2025/06/12
