Air insulated ring main unit

Abstract

The invention provides an air insulated ring main unit, which comprises a cabinet body, wherein the cabinet body is divided into an upper part, a middle part and a lower part; a drawer-type cabinet tank is arranged in the middle cabinet body; a guard plate and a wall-through bus are arranged in the upper cabinet body; the wall-through bus is provided with a main bus and a fixed contact; a circuit breaker, an isolating mechanism and a circuit breaker operating mechanism are arranged in the drawer-type cabinet tank; the isolating mechanism and the circuit breaker operating mechanism are located on the side surface of the circuit breaker; the circuit breaker comprises a glass fiber-reinforced nylon resin embedded pole shell; a current transformer is arranged in the lower cabinet body and is connected with the circuit breaker through a switch connection bar; the current transformer is connected with a sensor through a copper bar; and a lightning arrester is arranged at the lower part of the current transformer. The air insulated ring main unit is simple in structure, reasonable in design, low in manufacturing cost, nontoxic, odorless and good in weather fastness, can be completely recovered and recycled after being used, is harmless to the environment and meets the requirements of green power grid construction; and a product is convenient to repair.

Description

technical field [0001] The invention relates to the technical field of switch cabinets, in particular to an air-insulated 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] At present, the ring network cabinets on the market use SF6 inflatable cabinets, solid insulation cabinets and dry air and N 2 Inflatable cabinet. SF6 is a greenhouse effect gas, w...

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Problems solved by technology

[0005] The invention proposes an air-insulated ring network cabinet, which solves the problems of the prior art that the ring network cabinet will produce toxic gas, inconvenient maintenance, and high cost.

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