Outdoor 2 multiply 27.5 kV solid-sealing vacuum modular device of electrified railway

Abstract

An outdoor 2 multiply 27.5 kV solid-sealing vacuum modular device of electrified railway includes brackets, two connection branches mounted on the brackets that are parallel and independent to each other and an integrated automation control box, a bipolar solid-sealing disjunctor is mounted onto middle part of the brackets, an outgoing line connection terminal is located on a first solid-sealing strut type transformer, moving contact of a first bipolar disconnector is located on bracket of the first solid-sealing strut type transformer, between the first bipolar disconnector and the disjunctoris provided with current transformer, stationary contact of the first bipolar disconnector is located on the current transformer which is connected with a single polar solid-sealing disjunctor; an incoming line connection terminal is located on a second solid-sealing strut type transformer, moving contact of a second bipolar disconnector is located on the second solid-sealing strut type transformer, stationary contact of the second bipolar disconnector is located on a solie-sealing polar of the disjunctor. The invention can reduce floor space efficiently and capitalized cost, and has good reliability and good prosucts reliability, which is convenient to maintain.

Description

technical field [0001] The invention relates to a special switchgear for 2×27.5kV electrified railway in AT power supply mode. Background technique [0002] At present, the switchgear of electrified railway traction substations, divisional substations and AT substations are 2×27.5kV circuit breakers, voltage transformers, current transformers, bipolar isolating switches and other main equipment except for feeder bipolar isolating switches and anti-lightning coils. Arranged outdoors, others are arranged indoors with GIS inflatable switchgear, all of which need to be equipped with production houses to meet product use requirements. The 27.5kV incoming and outgoing lines in the high-voltage room adopt the cable entry (exit) method. Since there are many high-voltage cables in the incoming and outgoing lines, it is necessary to set up a cable interlayer under the production house to meet the cable laying requirements. Although this arrangement has high power supply reliability, ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing switchgear that occupy a large area, high investment cost, low reliability, troublesome maintenance, great influence from the external environment, and poor product reliability, the present invention provides a switchgear that effectively reduces the occupied area and reduces the investment cost. , Good reliability, easy maintenance, good product reliability electrified railway outdoor 2×27.5kV solid-sealed vacuum modular electrical appliances

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