Solid insulation ring main unit

Abstract

A solid insulation ring main unit comprises an operation panel, a seal isolation chamber, a solid-sealed polar pole and a fuse unit. The fuse unit comprises a fuse barrel and a fuse barrelhead; the fuse barrel comprises an incoming line port, an outgoing line port, a ground wire interface, a front bracing frame, a rear bracing frame and an insulation sleeve arranged between the front bracing frameand the rear bracing frame; the fuse barrel is internally provided with a fuse; the front bracing frame comprises a pedestal; the pedestal is internally provided with plum blossom contacts; a reinforcing spring is arranged at the peripheries of the plum blossom contacts to ensure contact pressure; the rear bracing frame comprises a pedestal, the pedestal is internally provided with a fuse core C-type jack, and a reinforcing spring is arranged at the periphery of the fuse core C-type jack; and the pedestal is a silica gel insulation sleeve. The structure design of the fuse unit can effectivelyreduce the generation of partial discharge to allow the ring main unit not to generate partial discharge after the ring main unit powers off, and therefore the solid insulation ring main unit is muchsafer and more reliable, is all-insulated, long in service, free in maintenance, small in occupation space and safe and reliable, cannot be influence by environments, etc.

Description

technical field [0001] The invention relates to the technical field of ring network cabinets, in particular to a solid insulating ring network cabinet. Background technique [0002] Ring Main Unit (Ring Main Unit) is a group of transmission and distribution electrical equipment (high-voltage switchgear) installed in a metal or non-metallic insulated cabinet or made into an assembled interval ring network power supply unit. Its core part adopts load switches and The fuse has the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution stations and box-type substations of load centers such as urban residential quarters, high-rise buildings, large public buildings, factories and enterprises. [0003] The ring network refers to the ring distribution network, that is, the main power supply line forms a closed ring, and the power supply supplies power to the ring main line, ...

AI Technical Summary

Problems solved by technology

When the left main fails, it continues to receive power from the right main, and when the right main fails, it continues to receive power from the left main, so that although the main power supply is single, But from each power distribution branch circuit, it can get benefits similar to dual-circuit power supply, which improves the reliability of power supply, but ordinary solid-insulated ring network cabinets cannot effectively eliminate partial discharge during use.

Images