Atmospheric pressure fully sealed air insulated RMU features air insulation and vacuum interruption. The main electric circuit is sealed in the RMU cabinet which adopts atmospheric pressure air as the insulation medium. The RMU’s high reliability and zero carbon emission are unprecedented in the field of power distribution networks. Over 10 years of its safe and stable application at home and abroad has proved that the switchgear is the right choice for those who want high reliable electricity supply and a greener environment.