The invention discloses an environment-friendly 12kV outdoor looped network
power supply unit which comprises an outer box, and an inflation compartment, a
circuit breaker operation mechanism and an isolation switch mechanism are arranged in the outer box. The inflation compartment is a sealed box body, and the box body is filled with environment-friendly gas; the
inflatable compartment is internally provided with a main
bus, a
branch bus and three groups of partition combination switches, one group of partition combination switches is arranged on the upper side of the interior of the
inflatable compartment, the other two groups of partition combination switches are arranged on the lower side of the interior of the
inflatable compartment, and the three groups of partition combination switches have the same structure; the three groups of partition combination switches are respectively connected with the cable sleeve through
branch buses; two ends of the main
bus are connected with the main bus side expansion sleeve; the isolation combination switch comprises a
solid-sealed polar pole
assembly, a three-position switch
assembly, an isolation static contact and a grounding static contact. The environment-friendly 12kV outdoor looped network
power supply unit has the remarkable advantages of being compact in structure, small in occupied area, convenient to maintain, high in reliability,
environmentally friendly, capable of saving energy and the like.